Updated on 2024/05/01

写真a

 
Kobayashi Hiroshi
 
Organization
Graduate Faculty of Interdisciplinary Research Faculty of Life and Environmental Sciences Environmental Science (Environmental Sciences) Associate Professor
Title
Associate Professor

Research History

  • 山梨大学大学院准教授

    2010.12

  • 山梨大学大学院助教

    2007.4

  • 山梨大学助手

    1999.4

Education

  • Hokkaido University

    - 1999.3

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    Country: Japan

  • Hokkaido University

    - 1994.3

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    Country: Japan

Degree

  • 博士(工学) ( 北海道大学 )

Research Areas

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Environmental systems for civil engineering  / Atmospheric science

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Environmental systems for civil engineering  / Ocean optics

Research Interests

  • Aerosol and cloud

  • 植物等の非破壊測定

  • Coastal pollution

  • Satellite remote sensing

Subject of research

  • Aerosol and cloud effects on climate

  • 光を利用した植物の非破壊測定

  • Remote sensing of coastal waters

Proposed theme of joint or funded research

  • 果樹の成熟度の非破壊測定

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    Possible form of cooperation:Technical Consultation, Funded Research, Cooperative Research Type of joint or funded research proposed:Wish to undertake joint research with industry and other organizations including private sector.

Research Projects

  • 船上観測による海洋性エアロゾルに関連するGCOM-Cプロダクトの検証および鉱物ダスト指数の開発

    2022.7 - 2025.3

    国立研究開発法人 宇宙航空研究開発機構  第3回地球観測研究公募 

    小林 拓

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    Authorship:Principal investigator  Type of fund::Joint research

  • 船上観測による海洋性エアロゾルに関するGCOM-Cプロダクトの検証

    2019.7 - 2022.3

    国立研究開発法人 宇宙航空研究開発機構  第2回地球観測研究公募 

    小林 拓

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    Authorship:Principal investigator  Type of fund::Joint research

  • 機械学習アルゴリズムを用いた微粒子越境輸送イベントの判定および予測手法の開発

    2018.4 - 2021.3

    基盤研究(C)

    小林 拓

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    Authorship:Principal investigator  Type of fund::Science research expense

  • 月を光源としたエアロゾル光学特性測定装置の開発に関する研究

    2017.4 - 2020.3

    基盤研究(C)

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    Authorship:Coinvestigator(s)  Type of fund::Science research expense

  • 沿岸域・湖沼の光学的性質特徴別分類に基づいた大気-水中結合アルゴリズム構築に関する現地観測

    2016.4 - 2019.3

    宇宙航空研究開発機構  地球環境変動観測ミッション(GCOM)第6回研究公募 

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    Authorship:Principal investigator  Type of fund::Joint research

  • 西太平洋~インド洋海域洋上エアロゾルの光学特性と変質

    2015.4 - 2019.3

    基盤研究(B)

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    Authorship:Coinvestigator(s)  Type of fund::Science research expense

  • 複数の山岳観測拠点をネットワーク化した越境輸送微粒子の動態監視システムの構築

    2015.4 - 2018.3

    基盤研究(C)

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    Authorship:Principal investigator  Type of fund::Science research expense

  • 富士山体を利用したエアロゾルの気候影響の研究―ラドン・イオンで気候変化を探るー

    2013.4 - 2016.3

    基盤研究(C)

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    Authorship:Coinvestigator(s)  Type of fund::Science research expense

  • 大気―海洋系を結合した沿岸域海色アルゴリズム開発のための検証手法の確立

    2013.4 - 2016.3

    宇宙航空研究開発機構  地球環境変動観測ミッション(GCOM)第4回研究公募 

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    Authorship:Principal investigator  Type of fund::Joint research

  • 個別粒子の偏光特性を利用した自由対流圏越境輸送微粒子の動態解明

    2012.4 - 2015.3

    基盤研究(C)

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    Authorship:Principal investigator  Type of fund::Science research expense

  • 北極域の混合相雲の放射・微物理特性の解明研究

    2009.4 - 2012.3

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    Authorship:Coinvestigator(s)  Type of fund::Science research expense

  • 摩周湖の透明度の低下原因解明と総合的環境保全に関する研究

    2009.4 - 2011.3

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    Authorship:Coinvestigator(s)  Type of fund::Funded research

  • 懸濁物質の非球形性を考慮した沿岸域リモートセンシングアルゴリズムの開発

    2008.4 - 2010.3

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    Authorship:Principal investigator  Type of fund::Science research expense

  • 自由対流圏を浮遊するバックグラウンド黄砂粒子の動態解析

    2007.11 - 2008.11

    2007年度住友財団環境研究助成 

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    Authorship:Principal investigator  Type of fund::Others

  • 近赤外バンドを用いた沿岸海域における衛星リモートセンシング

    2006.4 - 2008.3

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    Authorship:Principal investigator  Type of fund::Science research expense

  • 富士山山体を観測タワーとしたエアロゾル諸特性の鉛直的観測研究

    2005.4 - 2008.3

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    Authorship:Coinvestigator(s)  Type of fund::Science research expense

  • 閉鎖性水域における汚濁物質の衛星リモートセンシング

    2003.4 - 2006.3

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    Authorship:Principal investigator  Type of fund::Science research expense

  • 衛星リモートセンシングによる富士五湖の水質汚濁監視手法の開発

    2002.9 - 2003.9

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    Authorship:Principal investigator  Type of fund::Others

  • 可視域衛星データを用いた東アジア域エアロソル時空間分布の解析

    2002.4 - 2006.3

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    Authorship:Coinvestigator(s)  Type of fund::Science research expense

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Papers

  • Dithiothreitol-Measured Oxidative Potential of Reference Materials of Mineral Dust: Implications for the Toxicity of Mineral Dust Aerosols in the Atmosphere Reviewed

    Chiharu Nishita-Hara, Hiroshi Kobayashi, Keiichiro Hara, Masahiko Hayashi

    GeoHealth   7 ( 7 )   e2022GH000736   2023.7( ISSN:2471-1403 )

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1029/2022GH000736

  • Development and Classification of Japanese-Region-Specific Aerosol Models Based on 10-Year Sky Radiometer Observations Reviewed

    Hiroyasu Kobayashi, Hitoshi Irie, Masahiro Momoi, Takeru Ohno, Hirokazu Yamamoto, Pradeep Khatri, Itaru Sano, Hiroshi Okumura, Hiroshi Kobayashi

    SOLA   19   210 - 216   2023.7( ISSN:1349-6476 )

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2151/sola.2023-027

  • MODIS-derived green Noctiluca blooms in the upper Gulf of Thailand: Algorithm development and seasonal variation mapping Reviewed

    Luang-on Jutarak, Ishizaka Joji, Buranapratheprat Anukul, Phaksopa Jitraporn, Goes Joaquim I., Maúre Elígio de Raús, Siswanto Eko, Zhu Yuanli, Xu Qian, Nakornsantiphap Phattaranakorn, Kobayashi Hiroshi, Matsumura Satsuki

    Frontiers in Marine Science   10   2023.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3389/fmars.2023.1031901

  • 吸収性エアロゾルを考慮した海色リモートセンシング大気補正アルゴリズムの改良 Reviewed

    小倉 和, 小林 拓, 比嘉 紘士, 入江 仁士

    土木学会論文集b2(海岸工学)   78 ( 2 )   I_1039 - I_1044   2022.11

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    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2208/kaigan.78.2_I_1039

  • Ship-borne ceilometer measurements over the northwestern Pacific and the Indian sector of the Southern Ocean, and at Syowa Station, Antarctica, in the summers of 2010/11 to 2019/20 Reviewed

    Naohiko Hirasawa, Masataka Shiobara, Toshiyuki Murayama, Hiroshi Kobayashi

    Polar Data Journal   6   66 - 79   2022.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.20575/00000042

  • Exacerbation of PM2.5 concentration due to unpredictable weak Asian dust storm: A case study of an extraordinarily long-lasting spring haze episode in Seoul, Korea Reviewed

    Kyuseok Shim, Man-Hae Kim, Hyo-Jung Lee, Tomoaki Nishizawa, Atsushi Shimizu, Hiroshi Kobayashi, Cheol-Hee Kim, Sang-Woo Kim

    ATMOSPHERIC ENVIRONMENT   287   119261   2022.10( ISSN:1352-2310 )

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.atmosenv.2022.119261

  • Water-soluble organic nitrogen in fine aerosols over the Southern Ocean Reviewed

    Kiyoshi Matsumoto, Hiroshi Kobayashi, Keiichiro Hara, Sakiko Ishino, Masahiko Hayashi

    ATMOSPHERIC ENVIRONMENT   287   119287   2022.10( ISSN:1352-2310 )

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.atmosenv.2022.119287

  • エアロゾル集中観測dragon/J-Alpsを終えて Reviewed

    向井 苑生 , 佐野 到, 中田 真木子, Brent N. Holben & Aeronet group, 今須 良一, 岡本 渉, 梶野 瑞王, 小林 拓, 齊藤 保典, 佐藤 陽祐, 清水 厚, 高見 昭憲, 中口 譲, 西 典宏, 朴 虎東, 藤戸 俊行, 松見 豊, 溝渕 昭二, 宮原 裕一, 森山 達天喜

    エアロゾル研究   37 ( 2 )   136 - 144   2022.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.11203/jar.37.136

  • Seasonal and interannual variations of MODIS Aqua chlorophyll-a (2003–2017) in the Upper Gulf of Thailand influenced by Asian monsoons Reviewed International coauthorship

    Jutarak Luang-on, Joji Ishizaka, Anukul Buranapratheprat, Jitraporn Phaksopa, Joaquim I. Goes, Hiroshi Kobayashi, Masataka Hayashi, Elígio de Raús Maúre, Satsuki Matsumura

    JOURNAL OF OCEANOGRAPHY   2021.11( ISSN:0916-8370 )

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s10872-021-00625-2

  • 富士山体を用いた夏季自由対流圏における雲水中揮発性有機化合物の観測 Reviewed

    山脇 拓実, 大河内 博, 山本 修司, 山之越 恵理, 島田 幸治郎, 緒方 裕子, 勝見 尚也, 皆巳 幸也, 加藤 俊吾, 三浦 和彦, 戸田 敬, 和田 龍一, 竹内 政樹, 小林 拓, 土器屋 由紀子, 畠山 史郎

        55 ( 5 )   191 - 203   2020.8( ISSN:13414178 )

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:公益社団法人 大気環境学会  

    DOI: 10.11298/taiki.55.191

  • Nocturnal aerosol optical depth measurements with modified sky radiometer POM-02 using the moon as a light source Reviewed

    Uchiyama, A., Shiobara, M., Kobayashi, H., Matsunaga, T., Yamazaki, A., Inei, K., Kawai, K., Watanabe, Y.

    Atmospheric Measurement Techniques   12   6465 - 6488   2019.12( ISSN:1867-1381 )

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.5194/amt-12-6465-2019

  • Ground-based observation of lightning-induced nitrogen oxides at a mountaintop in free troposphere Reviewed

    Wada, R., Sadanaga, Y., Kato, S., Katsumi, N., Okochi, H., Iwamoto, Y., Miura, K., Kobayashi, H., Kamogawa, M., Matsumoto, J., Yonemura, S., Matsumi, Y., Kajino, M., Hatakeyama, S.,

    JOURNAL OF ATMOSPHERIC CHEMISTRY   76 ( 2 )   133 - 150   2019.5( ISSN:0167-7764 )

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s10874-019-09391-4

  • Synergistic effect of water-soluble species and relative humidity on morphological changes in aerosol particles in the Beijing megacity during severe pollution episodes Reviewed International coauthorship

    Pan, X., Ge, B., Wang, Z., Tian, Y., Liu, H., Wei, L., Yue, S., Uno, I., Kobayashi, H., Nishizawa, T., Shimizu, A., Fu, P., Wang, Z.

    ATMOSPHERIC CHEMISTRY AND PHYSICS   19 ( 1 )   219 - 232   2019.1( ISSN:1680-7316 )

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.5194/acp-19-219-2019

  • Variability of depolarization of aerosol particles in the megacity of Beijing: implications for the interaction between anthropogenic pollutants and mineral dust particles Reviewed International coauthorship

    Tian, Y., Pan, X., Nishizawa, T., Kobayashi, H., Uno, I., Wang, X., Shimizu, A., Wang, Z.

    ATMOSPHERIC CHEMISTRY AND PHYSICS   18 ( 24 )   18203 - 18217   2018.12( ISSN:1680-7316 )

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Copernicus Publications  

    DOI: 10.5194/acp-18-18203-2018

  • Humic-like substances global levels and extraction methods in aerosols Reviewed

    Katsumi, N., Miyake, S., Okochi, H., Minami, Y., Kobayashi, H., Kato, S., Wada, R., Takeuchi, M., Toda, K., Miura, K.

    Environmental Chemistry Letters   2018.10( ISSN:1610-3653 )

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s10311-018-00820-6

  • NOx酸化物質(NOz)計測手法の開発と山岳地域における実大気への応用 Reviewed

    和田, 龍一, 定永, 靖宗, 加藤, 俊吾, 勝見, 尚也, 大河内, 博, 岩本, 洋子, 三浦, 和彦, 小林, 拓, 鴨川, 仁, 松本, 淳, 米村, 正一郎, 松見, 豊, 梶野, 瑞王, 畠山, 史郎

    分析化学   67 ( 6 )   333 - 340   2018.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2116/bunsekikagaku.67.333

  • Morphometric analysis of polygonal cracking patterns in desiccated starch slurries Reviewed

    Akiba, Y., Magome, J., Kobayashi, H., Shima, H

    PHYSICAL REVIEW E   96 ( 2 )   023003   2017.8( ISSN:2470-0045  eISSN:2470-0053 )

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

    We investigate the geometry of two-dimensional polygonal cracking that forms on the air-exposed surface of dried starch slurries. Two different kinds of starches, made from potato and corn, exhibited distinguished crack evolution, and there were contrasting effects of slurry thickness on the probability distribution of the polygonal cell area. The experimental findings are believed to result from the difference in the shape and size of starch grains, which strongly influence the capillary transport of water and tensile stress field that drives the polygonal cracking.

    DOI: 10.1103/PhysRevE.96.023003

    Web of Science

  • Assessment of Chlorophyll-a Algorithms Considering Different Trophic Statuses and Optimal Bands Reviewed International coauthorship

    Salem, S.I., Higa, H., Kim, H., Kobayashi, H., Oki, K., Oki, T.

    SENSORS   17 ( 8 )   2017.7( ISSN:1424-8220 )

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:MDPI AG  

    Numerous algorithms have been proposed to retrieve chlorophyll-a concentrations in Case 2 waters; however, the retrieval accuracy is far from satisfactory. In this research, seven algorithms are assessed with different band combinations of multispectral and hyperspectral bands using linear (LN), quadratic polynomial (QP) and power (PW) regression approaches, resulting in altogether 43 algorithmic combinations. These algorithms are evaluated by using simulated and measured datasets to understand the strengths and limitations of these algorithms. Two simulated datasets comprising 500,000 reflectance spectra each, both based on wide ranges of inherent optical properties (IOPs), are generated for the calibration and validation stages. Results reveal that the regression approach (i.e., LN, QP, and PW) has more influence on the simulated dataset than on the measured one. The algorithms that incorporated linear regression provide the highest retrieval accuracy for the simulated dataset. Results from simulated datasets reveal that the 3-band (3b) algorithm that incorporate 665-nm and 680-nm bands and band tuning selection approach outperformed other algorithms with root mean square error (RMSE) of 15.87 mg.m(-3), 16.25 mg.m(-3), and 19.05 mg.m(-3), respectively. The spatial distribution of the best performing algorithms, for various combinations of chlorophyll-a (Chla) and non-algal particles (NAP) concentrations, show that the 3b_tuning_QP and 3b_680_QP outperform other algorithms in terms of minimum RMSE frequency of 33.19% and 60.52%, respectively. However, the two algorithms failed to accurately retrieve Chla for many combinations of Chla and NAP, particularly for low Chla and NAP concentrations. In addition, the spatial distribution emphasizes that no single algorithm can provide outstanding accuracy for Chla retrieval and that multi-algorithms should be included to reduce the error. Comparing the results of the measured and simulated datasets reveal that the algorithms that incorporate the 665-nm band outperform other algorithms for measured dataset (RMSE = 36.84 mg.m(-3)), while algorithms that incorporate the band tuning approach provide the highest retrieval accuracy for the simulated dataset (RMSE = 25.05 mg.m(-3)).

    DOI: 10.3390/s17081746

    Web of Science

  • Multi-Algorithm Indices and Look-Up Table for Chlorophyll-a Retrieval in Highly Turbid Water Bodies Using Multispectral Data Reviewed International coauthorship

    Salem Ibrahim Salem, Hiroto Higa, Hyungjun Kim, Komatsu Kazuhiro, Hiroshi Kobayashi, Kazuo Oki, Taikan Oki

    Remote Sensing   9 ( 6 )   556   2017.6( ISSN:2072-4292 )

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:MDPI AG  

    Many approaches have been proposed for monitoring the eutrophication of Case 2 waters using remote sensing data. Semi-analytical algorithms and spectrum matching are two major approaches for chlorophyll-a (Chla) retrieval. Semi-analytical algorithms provide indices correlated with phytoplankton characteristics, (e.g., maximum and minimum absorption peaks). Algorithms' indices are correlated with measured Chla through the regression process. The main drawback of the semi-analytical algorithms is that the derived relation is location and data limited. Spectrum matching and the look-up table approach rely on matching the measured reflectance with a large library of simulated references corresponding to wide ranges of water properties. The spectral matching approach taking hyperspectral measured reflectance as an input, leading to difficulties in incorporating data from multispectral satellites. Consequently, multi-algorithm indices and the look-up table (MAIN-LUT) technique is proposed to combine the merits of semi-analytical algorithms and look-up table, which can be applied to multispectral data. Eight combinations of four algorithms (i.e., 2-band, 3-band, maximum chlorophyll index, and normalized difference chlorophyll index) are investigated for the MAIN-LUT technique. In situ measurements and Medium Resolution Imaging Spectrometer (MERIS) sensor data are used to validate MAIN-LUT. In general, the MAIN-LUT provide a comparable retrieval accuracy with locally tuned algorithms. The most accurate of the locally tuned algorithms varied among datasets, revealing the limitation of these algorithms to be applied universally. In contrast, the MAIN-LUT provided relatively high retrieval accuracy for Tokyo Bay (R-2 = 0.692, root mean square error (RMSE) = 21.4 mg m(-3)), Lake Kasumigaura (R-2 = 0.866, RMSE = 11.3 mg m(-3)), and MERIS data over Lake Kasumigaura (R-2 = 0.57, RMSE = 36.5 mg m(-3)). The simulated reflectance library of MAIN-LUT was generated based on inherent optical properties of Tokyo Bay; however, the MAIN-LUT also provided high retrieval accuracy for Lake Kasumigaura. MAIN-LUT could capture the spatial and temporal distribution of Chla concentration for Lake Kasumigaura.

    DOI: 10.3390/rs9060556

    Web of Science

  • Significant impacts of heterogeneous reactions on the chemical composition and mixing state of dust particles: A case study during dust events over northern China Reviewed International coauthorship

    Wang, Z., X. Pan, I. Uno, J. Li, Z. Wang, X. Chen, P. Fu, T. Yang, H. Kobayashi, A. Shimizu, N. Sugimoto and S. Yamamoto

    ATMOSPHERIC ENVIRONMENT   159   83 - 91   2017.6( ISSN:1352-2310  eISSN:1873-2844 )

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    The impact of heterogeneous reactions on the chemical components and mixing state of dust particles are investigated by observations and an air quality model over northern China between March 27, 2015 and April 2, 2015. Synergetic observations were conducted using a polarization optical particle counter (POPC), a depolarized two-wavelength Lidar and filter samples in Beijing. During this period, dust plume passed through Beijing on March 28, and flew back on March 29 because of synoptic weather changes. Mineral dust mixed with anthropogenic pollutants was simulated using the Nested Air Quality Prediction Modeling System (NAQPMS) to examine the role of heterogeneous processes on the dust. A comparison of observations shows that the NAQPMS successfully reproduces the time series of the vertical profile, particulate matter concentration, and chemical components of fine mode (diameter <= 2.5 mu m) and coarse mode (2.5 mu m < diameter <= 10 mu m) particles. After considering the heterogeneous reactions, the simulated nitrate, ammonium, and sulfate are in better agreement with the observed values during this period. The modeling results with observations show that heterogeneous reactions are the major mechanisms producing nitrate reaching 19 mu g/m(3), and sulfate reaching 7 mu g/m(3), on coarse mode dust particles, which were almost 100% of the coarse mode nitrate and sulfate. The heterogeneous reactions are also important for fine mode secondary aerosols, for producing 17% of nitrate and 11% of sulfate on fine mode dust particles, with maximum mass concentrations of 6 mu g/m(3) and 4 mu g/m(3). In contrast, due to uptake of acid gases (e.g. HNO3 and SO2) by dust particles, the fine mode anthropogenic ammonium nitrate and ammonium sulfate decreased. As a result, the total fine mode nitrate decreased with a maximum of 14 mu g/m(3), while the total fine mode sulfate increased with a maximum of 2 mu g/m(3). Because of heterogeneous reactions, 15% of fine mode secondary inorganic aerosols and the entire coarse mode nitrate and sulfate were internally mixed with dust particles. The significant alterations of the chemical composition and mixing state of particles due to heterogeneous reactions are important for the direct and indirect climate effects of dust and anthropogenic aerosols. (C) 2017 The Authors. Published by Elsevier Ltd.

    DOI: 10.1016/j.atmosenv.2017.03.044

    Web of Science

  • Real-time observational evidence of changing Asian dust morphology with the mixing of heavy anthropogenic pollution Reviewed International coauthorship

    Xiaole Pan, Itsushi Uno, Zhe Wang, Tomoaki Nishizawa, Nobuo Sugimoto, Shigekazu Yamamoto, Hiroshi Kobayashi, Yele Sun, Pingqing Fu, Xiao Tang, Zifa Wang

    Scientific Reports   7   335   2017.3( ISSN:2045-2322 )

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:NATURE PUBLISHING GROUP  

    Natural mineral dust and heavy anthropogenic pollution and its complex interactions cause significant environmental problems in East Asia. Due to restrictions of observing technique, real-time morphological change in Asian dust particles owing to coating process of anthropogenic pollutants is still statistically unclear. Here, we first used a newly developed, single-particle polarization detector and quantitatively investigate the evolution of the polarization property of backscattering light reflected from dust particle as they were mixing with anthropogenic pollutants in North China. The decrease in observed depolarization ratio is mainly attributed to the decrease of aspect ratio of the dust particles as a result of continuous coating processes. Hygroscopic growth of Calcium nitrate (Ca(NO3)(2)) on the surface of the dust particles played a vital role, particularly when they are stagnant in the polluted region with high RH conditions. Reliable statistics highlight the significant importance of internally mixed, 'quasi-spherical' Asian dust particles, which markedly act as cloud condensation nuclei and exert regional climate change.

    DOI: 10.1038/s41598-017-00444-w

    Web of Science

  • Optical properties of mixed aerosol layers over Japan derived with multi-wavelength Mie-Raman lidar system Reviewed International coauthorship

    Hara, Yukari, Nishizawa, Tomoaki, Sugimoto, Nobuo, Matsui, Ichiro, Pan, Xiaole, Kobayashi, Hiroshi, Osada, Kazuo, Uno, Itsushi

    Journal of Quantitative Spectroscopy & Radiative Transfer   188   20 - 27   2017( ISSN:0022-4073 )

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jqsrt.2016.06.038

    Web of Science

  • Cloud Fractions Estimated from Shipboard Whole-Sky Camera and Ceilometer Observations Reviewed

    Makoto KUJI, Risa FUJIMOTO, Mayu MIYAGAWA, Ryoko FUNADA, Masahiro HORI, Hiroshi KOBAYASHI, Seizi KOGA, Junji MATSUSHITA, Masataka SHIOBARA

    Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan   14 ( ists30 )   Pn_7 - Pn_13   2016.12

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    DOI: 10.2322/tastj.14.Pn_7

  • Atmospheric CO, O3, and SO2 Measurements at the Summit of Mt. Fuji during the Summer of 2013 Reviewed

    Shungo Kato, Yasuhiro Shiobara, Katsumi Uchiyama, Kazuhiko Miura, Hiroshi Okochi, Hiroshi Kobayashi, Shiro Hatakeyama

    Aerosol and Air Quality Research   16 ( 10 )   2368 - 2377   2016.10( ISSN:1680-8584  eISSN:2071-1409 )

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    Atmospheric trace gases CO, O-3, and SO2 were observed at the summit of Mt. Fuji (3776 ma.s.l.) during the summer of 2013. Considerable variations were observed in the concentrations of CO and O-3; however, they were correlated in most cases. Trends analyzed through backward trajectory calculations showed lower concentrations of CO and O-3 transported from the Pacific Ocean and South East Asia directions, while higher concentrations were detected from the direction of the Asian continent. High O-3 and low CO concentrations were observed during some periods; in these air masses, water content of the air was low indicating that the air originated from high altitudes and was influenced by the stratosphere. Gaseous SO2 was mostly lower than the detection limit of the instrument used for measurement (0.06 ppbv), but on August 20-21, high SO2 spikes of about 5 ppbv were observed. Backward and forward trajectory calculations confirmed that volcanic smoke from the Sakurajima volcano was transported to the summit of Mt. Fuji.

    DOI: 10.4209/aaqr.2015.11.0632

    Web of Science

  • Polarization properties of aerosol particles over western Japan: classification, seasonal variation, and implications for air quality Reviewed International coauthorship

    Pan, X., Uno, I., Hara, Y., Osada, K., Yamamoto, S., Wang, Z., Sugimoto, N., Kobayashi, H., and Wang, Z.

    ATMOSPHERIC CHEMISTRY AND PHYSICS   16 ( 15 )   9863 - 9873   2016.8( ISSN:1680-7316 )

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    DOI: 10.5194/acp-16-9863-2016

    Web of Science

  • 東京湾における海色リモートセンシングを用いた水環境モニタリング手法の提案 Reviewed

    比嘉紘士, 鯉渕幸生, 小林拓, 虎谷充浩, 作野裕司

    土木学会論文集B2(海岸工学)   71 ( 2 )   1735 - 1740   2016.6

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  • 九州北部で2014年5月下旬から1週間継続した黄砂と高濃度大気汚染現象のオーバービュー Reviewed International coauthorship

    鵜野伊津志, Xiaole Pan, 板橋秀一, 弓本桂也, 原由香里, 栗林正俊, 山本重一, 下原孝章, 田村圭, 緒方美治, 長田和雄, 上口友輔, 山田早紀, 小林拓

    大気環境学会誌   51 ( 1 )   44 - 57   2016.1

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  • 山梨県甲府市で採取された大気エアロゾルの化学的特徴 Reviewed

    松本潔, 石井勇希, 山本裕也, 増田紀雄, 北村梨紗, 金聖彬, 坂井美紗, 橋本直樹, 勝浦玖美, 長田愛理, 篠原広徳, 小林拓, 兼保直樹

    大気環境学会誌   51 ( 1 )   64 - 76   2016.1

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  • Integrated Study of AD-Net Mie-Lidar Network and Data Assimilated CTM for Asian Dust Epidemiology in Japan Reviewed

    Shimizu A, Nishizawa T, Sugimoto N, Matsui I, Kobayashi H, Maki T, Sekiyama T.T, Kanatani K

    EPJ Web of Conferences   119   2016

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    Language:English   Publishing type:(MISC) Introduction and explanation (international conference proceedings)  

    DOI: 10.1051/epjconf/201611908007

    Scopus

    Other Link: http://orcid.org/0000-0002-1843-4291

  • 偏光光散乱式粒子数計測装置による鉱物粒子濃度推定方法の検討 Reviewed

    鷹取翔, 小林 拓, 松本潔

    エアロゾル研究   30 ( 4 )   270 - 274   2015.12

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    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.11203/jar3027

  • Development of new shipborne aureolemeter to measure the intensities of direct and scattered solar radiation on rolling and pitching vessel

    Proc. SPIE 9640, Remote Sensing of Clouds and the Atmosphere XX, 96401A   9640   2015.10

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    DOI: 10.1117/12.21956

  • 伊勢・三河湾におけるMODISとSeaWiFSのクロロフィルa濃度の検証と改善 Reviewed

    林正能, 石坂丞二, 小林拓, 虎谷充浩, 中村亨, 中嶋康生, 山田智

    日本リモートセンシング学会誌   35 ( 4 )   245 - 259   2015.9

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  • Observation of the simultaneous transport of Asian mineral dust aerosols with anthropogenic pollutants using a POPC during a long-lasting dust event in late spring 2014 Reviewed International coauthorship

    Xiaole Pan, Itsushi Uno, Yukari Hara, Masatoshi Kuribayashi, Hiroshi Kobayashi, Nobuo Sugimoto, Shigekazu Yamamoto, Takaaki Shimohara, Zifa Wang

    GEOPHYSICAL RESEARCH LETTERS   42 ( 5 )   1593 - 1598   2015.3( ISSN:0094-8276  eISSN:1944-8007 )

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    We observed a long-lasting dust event from 25 May to 2 June 2014, using a polarization optical particle counter (POPC). The transport of dust plumes over East Asia was verified on the basis of observations of Moderate Resolution Imaging Spectroradiometer, a lidar network, and surface synoptic observation stations. Mixing of dust and anthropogenic pollutants was investigated according to the variation in the depolarization ratio as a function of particle size. The nonsphericity of dust particles varied due to the impact of anthropogenic pollutants on their pathway. In the coarse mode, dust particles always had a clear nonspherical configuration, although large amounts of nitrate were also present. Supermicron particles are occasionally present in a spherical configuration, possibly due to the complex mixing of natural dust and anthropogenic particles. Statistically, similar to 64% of the total nitrate mass was deemed to be transported from outside of Japan due to a trapping effect in the dust plume.

    DOI: 10.1002/2014GL062491

    Web of Science

  • Detection of Internally Mixed Asian Dust with Air Pollution Aerosols Using a Polarization Optical Particle Counter and a Polarization-Sensitive Two-Wavelength Lidar Reviewed

    Journal of Quantitative Spectroscopy and Radiative Transfer   150   107 - 113   2015.1

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  • Numerical Simulation and Remote Sensing for the Analysis of Blue Tide Distribution in Tokyo Bay in September 2012 Reviewed

    Higa Hiroto, Koibuchi Yukio, Kobayashi Hiroshi, Toratani Mitsuhiro, Sakuno Yuji

    JOURNAL OF ADVANCED SIMULATION IN SCIENCE AND ENGINEERING   2 ( 1 )   1 - 15   2015( ISSN:2188-5303 )

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    DOI: 10.15748/jasse.2.1

    Web of Science

  • Development of new shipborne aureolemeter to measure the intensities of direct and scattered solar radiation on rolling and pitching vessel

    Hiroshi Kobayashi, Masataka Shiobara

    REMOTE SENSING OF CLOUDS AND THE ATMOSPHERE XX   9640   1A 1 - 9   2015( ISSN:0277-786X )

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    Authorship:Lead author   Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:SPIE-INT SOC OPTICAL ENGINEERING  

    New shipborne aureolemeter was developed to improve the sun-tracking performance for accurate measurements of not only direct but also circumsolar radiation, even on a vessel weltering. Sun position is determined by a real-time image processing system with a CCD camera. The accuracy of the sun position determination is finer than 0.01 degrees. The radiometer is tracked the sun under a feedback control with the derived sun position. For a sky radiance distribution measurement, the control target position on the CCD camera image is shifted a pixel corresponding to a measuring scattering angle. In the case of a scattering angle larger than 7 degrees, the radiometer's tracking is conducted under feed forward control on the basis of the angle of roll and pitch monitored with a gyroscope. The instrument constants were determined from a Langley plot method. Test observation was conducted onboard the Antarctic research vessel (R/V) Shirase during the 56th Japanese Antarctic Research Expedition (JARE-56; 2014-2015). Aerosol optical thickness (AOT) was measured. The measurement of the sky radiance distribution is being analyzed to derive the aerosol optical properties.

    DOI: 10.1117/12.2195691

    Web of Science

  • Development of a polarization optical particle counter capable of aerosol type classification Reviewed

    ATMOSPHERIC ENVIRONMENT   97   486 - 492   2014.12( ISSN:1352-2310 )

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  • Improvement of shipborne sky radiometer and its demonstration aboard the Antarctic R/V Shirase Reviewed

    Antarctic Record   58 ( 3 )   341 - 351   2014.11

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  • 衛星リモートセンシングを用いた東京湾における高濃度化したクロロフィルa分布の変動要因に関する考察 Reviewed

    比嘉紘士, 鯉渕幸生, 小林拓, 虎谷充浩, 作野裕司

    土木学会論文集B2(海岸工学)   70 ( 2 )   1091 - 1095   2014.11

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  • Water-soluble organic nitrogen in the ambient aerosols and its contribution to the dry deposition of fixed nitrogen species in Japan Reviewed

    Kiyoshi Matsumoto, Yuya Yamamoto, Hiroshi Kobayashi, Naoki Kaneyasu, Takashi Nakano

    ATMOSPHERIC ENVIRONMENT   95   334 - 343   2014.10( ISSN:1352-2310  eISSN:1873-2844 )

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    Measurements of the water-soluble organic nitrogen (WSON) in the aerosols were conducted over three years at two sites; an urban site in Kofu and a forested site in Fujiyoshida, Japan. Our preliminary experiment demonstrated that the adsorption of organic gases on the filter had little effect on the measurement of the WSON. The mean concentration of the WSON in the aerosols at the urban site was 0.221 mu g m(-3), which was higher than that of 0.101 mu g m(-3) at the forested site. Large portions of the WSON were found in the fine-mode range; 90.3% at the urban site and 86.4% at the forested site. The WSON constituted a significant fraction of the water-soluble total nitrogen (WSTN) in the aerosols; 11.1% and 16.2% of the WSTN in the coarse and fine particles, respectively, at the urban site, and 11.5% and 13.1% in the coarse and fine particles, respectively, at the forested site. The fine-mode WSON would be derived from the reaction of its basic precursor gases with particulate or gaseous acidic species. Photochemical reactions and combustion emissions could also be important sources of the fine-mode WSON. In the coarse-mode range, on the other hand, vegetation sources could be an important source of the WSON. The mean concentration of urea in the aerosols at the urban site was 1.7 ngN m(-3). A large portion (87.2%) of the urea was partitioned into the fine-mode range. Urea is a minor compound in the particulate WSON in this region with contributions to about 1% of the WSON. Approximately 26% of the dry deposition of the WSTN was attributed to the WSON in the cold season. The significant part (96.5%) of the WSON was deposited by coarse aerosols. Coarse-mode WSON is important for discussing the dry deposition fluxes of the WSON and fixed nitrogen. (C) 2014 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.atmosenv.2014.06.037

    Web of Science

  • Development and verification of GCOM-C1/SGLI ocean algorithms Reviewed

    T. Hirata, T. Hirawake, F. Sakaida, H. Yamaguchi, K. Suzuki, H. Murakami, J. Ishizaka, Hiroshi Kobayashi, A. Fujiwara, M. Toratani, S. Saitoh

    Journal of the Remote Sensing Society of Japan   34 ( 4 )   285   2014.9

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  • 2012年夏季の富士山頂および山麓における大気中揮発性有機化合物の挙動 Reviewed

    山本修司, 大河内博, 緒方裕子, 名古屋俊士, 皆巳幸也, 小林拓, 加藤俊吾

    大気環境学会誌   49 ( 1 )   34 - 42   2014.6

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  • Case study on microphysical properties of boundary layer mixed-phase cloud observed at Ny-angstrom lesund, Svalbard: Observed cloud microphysics and calculated optical properties on 9 June 2011 Reviewed

    Akihiro Uchiyama, Akihiro Yamazaki, Masataka Shiobara, Hiroshi Kobayashi

    POLAR SCIENCE   8 ( 2 )   57 - 72   2014.6( ISSN:1873-9652  eISSN:1876-4428 )

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    Cloud radiation interactions are important in the global climate system. However, an understanding of mixed-phase boundary layer clouds in the Arctic remains poor. During May-June 2011, ground-based in situ measurements were made at Zeppelin Station, operated by the Norwegian Polar Institute (altitude 474 m) in Ny-Alesund (78.9 degrees N, 11.9 degrees E), Svalbard. The instruments used comprised a Cloud, Aerosol and Precipitation Spectrometer (CAPS), and a Cloud Particle Microscope imager. The CAPS incorporated a Cloud and Aerosol Spectrometer and Cloud Imaging Probe (CIP). During the observation period, clouds associated with cyclonic disturbances and those associated with outbreaks of westerly cold air masses from the sea were observed. Atmospheric temperature during all measurements ranged from 0 to -5 degrees C. In every case, columns were the major type of ice particle measured by the CAPS-CIP. Cloud microphysical properties were observed continuously on 9 June 2011. Size spectra, liquid/ice water content, and particle effective size changed depending on progress stages. Based on the observed microphysics, optical properties were calculated and investigated. Optical properties were determined mainly by those of liquid water particles, even during periods when the relative contribution of ice particles to total water content was at the maximum. It was confirmed that the wavelength region of 1.6 and 2.2 mu m can be used in remote sensing. This study shows that it is possible to measure detailed changes of cloud properties in the Arctic region by using instruments installed at a ground-based mountain station. (C) 2013 Elsevier B.V. and NIPR. All rights reserved.

    DOI: 10.1016/j.polar.2013.11.001

    Web of Science

  • Volatility of water-soluble organic carbon in ambient aerosols Reviewed

    Kiyoshi Matsumoto, Yuki Ishii, Sungben Kim, Naoki Kaneyasu, Hiroshi Kobayashi

    JOURNAL OF AEROSOL SCIENCE   67   38 - 47   2014.1( ISSN:0021-8502  eISSN:1879-1964 )

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    To examine the evaporation and its application to understand the chemical properties, formation mechanisms, and sources of the water-soluble organic carbon (WSOC) in ambient aerosols, field measurements of carbonaceous compounds in the aerosols were conducted at an urban site in a provincial city, Kofu, Japan. The WSOC in the fine particles evaporated with heating at lower temperature than that in the coarse particles, whereas the water-insoluble organic carbon (WIOC) in the fine particles remained at higher temperature compared with that in the coarse particles. In the fine particles, the WSOC would be more volatile than the WIOC. In the coarse particles, on the other hand, the volatility of the WSOC would be similar with that of the WIOC, and both would have the volatility between the fine-mode WSOC and WIOC. Significant parts of the WSOC were not evolved at 340 degrees C in air. Adsorption of gaseous organic compounds on quartz fiber filters influenced the measurements of the total carbon and WSOC, especially the carbon evolved at and lower than 120 degrees C. The evaporation of single standards of four typical water-soluble organic compounds was also examined, of which the results indicated a significant contribution of low molecular weight organic compounds to the WSOC, especially the fine-mode WSOC. (C) 2013 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.jaerosci.2013.09.005

    Web of Science

  • 富士山山頂における雲凝結核濃度の測定 Reviewed

    長谷川朋子, 三浦和彦, 飯沼和久, 小林拓

    エアロゾル研究   27 ( 2 )   189 - 196   2012.6

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  • Development of polarization optical particle counter to detect particle shape information

    Hiroshi Kobayashi, Masahiko Hayashi, Yoshinobu Nakura, Takayuki Enomoto, Kazuhiko Miura, Hiroshi Takahashi, Yasuhito Igarashi, Hiroaki Naoe, Tomoaki Nishizawa, Nobuo Sugimoto, Naoki Kaneyasu

    Proceedings of SPIE - The International Society for Optical Engineering   8526   2012.1( ISSN:0277-786X )

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    Polarization optical particle counter (POPC) capable of measuring particle shape or sphericity was developed, which uses detection of polarization of light scattered by particles. Sensors that detected P- and S- polarization components are incorporated at scattering angle of 120° in addition to ordinary sensor located at the angle of 60°. The particle size is derived from the pulse height detected with the ordinary sensor. The size thresholds were determined by measurements of standard particles of polystyrene latex bead. Polarization of particle is calculated as the ratio of S polarization component to the sum of all components. The POPC field observations were started in Fukuoka, Japan on 22th February 2012. The mass concentration of each aerosol type such as air pollution, dust, and sea-salt particles was calculated from the POPC measurement with estimated aerosol type classification rule. The result shows apparent seasonal variation of dust mass concentration. The estimated bulk depolarization ratios of each aerosol type in all results corresponded with each other. The values of air pollution, dust, and sea-salt particles were 0.17-0.24, 0.55-0.67, and 0.06-0.12, respectively. This result will contribute the LIDAR data analysis. The POPC thus is capable of measuring particle shape as well as size for each individual particle. ©2012 SPIE.

    DOI: 10.1117/12.979634

    Scopus

    Other Link: http://orcid.org/0000-0002-6396-788X

  • Investigation on Optical Environmental Properties and Chlorophyll-a Distribution in Tokyo Bay

    HIGA Hiroto, KOIBUCHI Yukio, KOBAYASHI Hiroshi, SAKUNO Yuji, TORATANI Mitsuhiro, ISOBE Masahiko

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)   68 ( 2 )   I_1486 - I_1490   2012( ISSN:1884-2399 )

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    Remote sensing reflectance (Rrs) and absorption coefficient were measured by carrying out field observation in Tokyo bay to figure out optical properties of high eutrophicated coastal area and to develop estimated model of high concentrated Chlorophyll-a (Chl-a). It was the result that when Rrs of high concentrated Chl-a was observed, green wavelength of Rrs decreases, red wavelength of Rrs increases, and absorption coefficient of the phytoplankton of the green wavelength increases. Based on consideration, we developed estimation model for high concentrated Chl-a using the correction term of estimated error. In the result of verification of suggested model, it could appropriately improve the accuracy. Furthermore, behavior of Chl-a distribution in Tokyo Bay was discussed using the satellite data which was applied for suggested model.

    DOI: 10.2208/kaigan.68.I_1486

  • 青潮発生時における海色の定量評価の試み Reviewed

    作野裕司, 小林拓, 比嘉紘士, 鯉渕幸生, 虎谷充浩

    土木学会論文集B3(海洋開発)   67 ( 2 )   I_376 - I_381   2011.12

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  • A model for estimating Chlorophyll and SS in coastal area by Satellite Remote Sensing Reviewed

    比嘉紘士, 鯉渕幸生, 小林拓, 作野裕司, 虎谷充浩

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)   67 ( 2 )   1391 - 1395   2011.11

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  • Optical properties of inorganic suspended solids and their influence on ocean colour remote sensing in highly turbid coastal waters Reviewed International coauthorship

    Hiroshi Kobayashi, Mitsuhiro Toratani, Satsuki Matsumura, Absornsuda Siripong, Thaithaworn Lirdwitayaprasit, Pachoenchoke Jintasaeranee

    INTERNATIONAL JOURNAL OF REMOTE SENSING   32 ( 23 )   8393 - 8420   2011( ISSN:0143-1161 )

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    The influence of the optical properties of inorganic suspended solids (ISS) on in-water algorithms was evaluated using an optical model in highly turbid coastal water, whose ISS concentration reached several hundred grams per cubic metre. The measurements were conducted in the upper Gulf of Thailand. The backscattering coefficient of the ISS was calculated using the Lorenz-Mie scattering theory. On the basis of the measurement, the ISS size distribution was parameterized as a function of ISS concentration, and both the spherical and non-spherical particle shape models were evaluated. For ISS concentrations of 10 g m(-3), an estimate of the chlorophyll-a (chl-a) concentration within a factor of 2 on a logarithmic scale is possible in a [chl-a] range of 4-30 mg m(-3). The differential coefficient of remote sensing reflectance was calculated to evaluate its respective sensitivities for chl-a and ISS concentrations. The use of radiometric data at 670 nm (700-900 nm) is valid for in-water algorithms used to estimate chl-a (ISS) concentration in highly turbid coastal waters.

    DOI: 10.1080/01431161.2010.542193

    Web of Science

  • 昭和基地における地上エアロゾルモニタリング Reviewed

    林政彦, 長田和雄, 原圭一郎, 矢吹正教, 小林拓, 猪原哲, 和田誠, 山内恭, 橋田元, 塩原匡貴

    南極資料   Vol.54   2011

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  • 海洋観測専用船による南極海の大気エアロゾル観測 Reviewed

    長田和雄, 原圭一郎, 矢吹正教, 西田千春, 小林拓, 三浦和彦, 上田紗也子, 林政彦, 橋田元, 塩原匡貴, 和田誠, 山内恭

    南極資料   Vol.54   2011

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  • 摩周湖水中ニッケルおよびバナジウム濃度の深度プロファイルと大気経由人為起源ニッケルおよびバナジウム供給の可能性 Reviewed

    南尚嗣, 坂上寛敏, 白俊玲, 万德佳菜子, 原田大資, 高橋信夫, 厚谷郁夫, 深澤達矢, 濱田浩美, 五十嵐聖貴, 藤江晋, 小林拓, 田中敦, 神和夫

    分析化学   59 ( 12 )   1105 - 1111   2010.12

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  • 海鷹丸南極海研究航海で観測された海洋性エアロゾルの光学的厚さ Reviewed

    小林拓, 平譯享, 矢吹正教, 上田紗也子, 長田和雄, 塩原匡貴, 福地光男

    南極資料   54   465 - 473   2010.12

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  • 夏季富士山頂で測定された不溶性粒子の粒径分布 Reviewed

    小林拓,三浦和彦,兼保直樹,五十嵐康人

    エアロゾル研究   25 ( 2 )   167 - 176   2010.6

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  • Observations of atmospheric aerosol particles over the Antarctic Ocean by ocean research vessels Reviewed

    Osada, Kazuo, Hara, Keiichiro, Yabuki, Masanori, Nishita-Hara, Chiharu, Kobayashi, Hiroshi, Miura, Kazuhiko, Ueda, Sayako, Hayashi, Masahiko, Hashida, Gen, Shiobara, Masataka, Wada, Makoto, Yamanouchi, Takashi

    Antarctic Record   54 ( Sp. Iss. SI )   2010

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  • ニーオルスンでのスカイラジオメータ観測に基づく2006年および2007年の春季エアロゾルの光学特性

    塩原匡貴, 矢吹正教, 山野牧, 青木一真, 小林拓

    南極資料   54, 890-898   2010

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  • 昭和基地マイクロパルスライダーによって観測された非地形性慣性重力波起源の南極極成層圏雲

    柴田隆, 佐藤薫, 小林拓, 矢吹正教, 塩原匡貴

    南極資料   54, 779-792   2010

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  • 昭和基地で観測された大気エアロゾル中の金属成分および炭素成分の季節変動

    小林拓, 原圭一郎, 塩原匡貴, 山内恭, 長田和雄, 太田幸雄

    南極資料   54, 554-561   2010

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • Size Distribution of Water-Insoluble Particles Measured at the Summit of Mt. Fuji in Summer Reviewed

    KOBAYASHI Hiroshi, MIURA Kazuhiko, KANEYASU Naoki, IGARASHI Yasuhito

    Earozoru Kenkyu   25 ( 2 )   167 - 176   2010( ISSN:0912-2834 )

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japan Association of Aerosol Science and Technology  

    Filter sampling was conducted at the summit of Mt. Fuji to observe microphysical properties of Asian dust in the free troposphere. In order to avoid influence of local mineral dust elevated from near the summit, the filter sampling was conducted only during the nighttime from 0:00 to 6:00. Volume-size distribution of water-insoluble aerosol particles was measured by using a Coulter Multisizer. The samples with the minimum local influence showed the size distributions with the mode diameters of 3.1 and 4.5 μm. These mode diameters correspond to those measured on the ground during Asian dust event. Therefore, the measured water-insoluble aerosol particles were of background Asian dust in the free troposphere. In addition, a narrow size distribution with a mode diameter of 1.8 μm which could be the contribution of inorganic ash spheres also appeared. The measurement of sample which was separated by wind direction and speed during 2006 summer showed the mode diameter of around 5-6 μm, which would be of the mineral dust elevated from near the summit. For proper observation of mineral dust (water-insoluble particle) in the free troposphere, it is required to adopt the sampling time from 0:00 till sunrise.

    DOI: 10.11203/jar.25.167

    CiNii Books

  • GEOSS-SKYNETエアロゾル・インレットの設計と多分散フライアッシュ粒子による特性評価 Reviewed

    兼保直樹, 山形定, 小林拓

    エアロゾル研究   24 ( 3 )   201 - 208   2009.9

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • 富士山の谷風によるエアロゾルの輸送 Reviewed

    藤代恵史, 三浦和彦, 藤田慎一, 小林拓

    エアロゾル研究   24 ( 2 )   123 - 128   2009.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • Factors controlling sea salt modification and dry deposition of nonsea-salt components to the ocean Reviewed

    Kawakami, N., Osada, K., Nishita, C., Yabuki, M., Kobayashi, H., Hara, K., Shiobara, M.

    Journal of Geophysical Research-Atmospheres   113 ( D14 )   2008

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1029/2007JD009410

    Web of Science

  • Optical and chemical properties of the marine boundary layer aerosol around Japan from the R/V Shirase 2002 shipboard measurement Reviewed

    M. Shiobara, K. Hara, M. Yabuki, H. Kobayashi

    Atmospheric Environment   41 ( 22 )   4638 - 4652   2007.7

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  • High-resolution measurement of size distributions of Asian dust using a coulter multisizer Reviewed

    Hiroshi Kobayashi, Kimio Arao, Toshiyuki Murayama, Kengo Iokibe, Ryuji Koga, Masataka Shiobara

    JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY   24 ( 2 )   194 - 205   2007.2( ISSN:0739-0572 )

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER METEOROLOGICAL SOC  

    A Coulter Multisizer, which is based on the electrical sensing zone (ESZ) or the Coulter principle, was used to measure the size distribution of Asian dust. Coulter Multisizer analysis provides high-resolution size measurements of water-insoluble aerosol particles (WIPs) and the number concentration at each size bin. Aerosol filter sampling was conducted at four sites in Japan during spring 2003. The measured volume size distributions fit fairly well with a lognormal distribution. The results show that the WIP size distributions of the same Asian dust air mass varied at each sampling site and the volume mode diameter at the sites reduced from west to east. The derived volume mode diameter ranged from 1.4 to 2.2 mu m and was comparatively smaller than those in previous studies on Asian dust. This can be explained by the possible internal mixing of Asian dust with other components and by the breaking of particles and dispersion of aggregations by ultrasonification during extraction. The analysis method was improved by washing the aerosol particles collected on a filter using a magnetic stirrer, instead of an ultrasonic cleaner. As a result, the WIP size distribution can be measured in the range of 1-10 mu m. The measured mode diameters were 2.6-3.1 and 4.3-5.6 mu m in 2 Asian dust phenomena at Kofu, Japan, in 2004. It is demonstrated that the Coulter Multisizer method can furnish detailed information regarding the spatial and temporal variations in the mineral dust size distribution.

    DOI: 10.1175/JTECH1965.1

    Web of Science

  • Optical properties of inonorganic suspended solid based on the ship observations conducted around the estuary of Banpakong River

    123 - 130   2006.12

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  • Estimation of chlorophyll-a concentration from satellite ocean color data in Upper Gulf of Thailand

    M. Toratani,H. Kobayashi,S. Matsumura,A. Siripong,T. Lerdwithayaprasith

    Proceedings of SPIE, Remote Sensing of the Marine Environment   6406   64060   2006.11

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  • Characteristics of sulfate haze over East Asia retrieved with satellite and ground-based remote sensing data

    Makoto Kuji,Sachiko Hayashida,Masataka Shiobara,Masanori Yabuki,Keiichiro Hara,Hiroshi Kobayashi,Tadahiro Hayasaka,Shinsuke Satake

    Proceedings of SPIE, Remote Sensing of the Atmosphere and Clouds   6408   64080   2006.11

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  • Optical properties of Asian dust measured at several sites in Japan Reviewed

    H.Kobayashi,K.Arao,T.Murayama,K.Iokibe,R.Koga,M.Yabuki,M.Shiobara

    IRS2004 : Current Problems in Atmospheric Radiation : Proceedings of the International Radiation Symposium, Busan, Korea, 23-28 August 2004   315 - 318   2006.6

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)  

  • Atmospheric aerosol deposition on snow surfaces and its effect on albedo Reviewed

    Teruo Aoki, Hiroki Motoyoshi, Yuji Kodama, Teppei J. Yasunari, Konosuke Sugiura, Hiroshi Kobayashi

    SOLA   2   13 - 16   2006.2

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

  • Characteristics of sulfate haze over East Asia retrieved with satellite and ground-based remote sensing data Reviewed

    Makoto Kuji, Sachiko Hayashida, Masataka Shiobara, Masanori Yabuki, Keiichiro Hara, Hiroshi Kobayashi, Tadahiro Hayasaka, Shinsuke Satake

    REMOTE SENSING OF THE ATMOSPHERE AND CLOUDS   6408   2006( ISSN:0277-786X  eISSN:1996-756X )

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:SPIE-INT SOC OPTICAL ENGINEERING  

    Optical observation around near UV spectral region potentially enables us to retrieve light absorbing features of aerosol, such as type as well as optical thickness. We analyzed near UV observation data to identify haze properties around Japan in the autumn of 2003, using Global Imager onboard Advanced Earth Observing Satellite-II (ADEOS-II/GLI), which has 380nm and 400nm window channels. At the same time, we had optical observation, such as a ground-based LIDAR measurement and a shipborne skyradiometer measurement, so as to retrieve vertical profile, particle sphericity, particle size distribution, and optical thickness of the haze.Based upon the three kinds of analyses with remotely sensed data, such as satellite, LIDAR, and skyradiometer, we have the following characteristics of the haze: little UV absorbing, of optical thickness 0.5 (around 500nm), within lower boundary layer (less than around 1km a.s.l.), and of spherical and fine particles (0.2 mu m in radius).We also have some direct sampling measurements onboard Research Vessel Shirase, such as integrated nephelometer, particle soot/absorption photometer, and optical particle counter, so as to identify optical and microphysical properties of the haze as well as chemical composition analyses. The results of the surface direct sampling showed the dense haze dominantly consisted of smaller (0.2 mu m in radius) and sulfate particulates, which is consistent to the remotely sensed results.Backward trajectory simulations also indicate that the hazy air mass had arrived from/through some mega cities over East Asia. Further, we are going to investigate the consistency between optical, microphysical, chemical, and dynamical aspects using a chemical transport model.

    DOI: 10.1117/12.693033

    Web of Science

  • Estimation of chlorophyll-a concentration from satellite ocean color data in Upper Gulf of Thailand International coauthorship

    Mitsuhiro Toratani, Hiroshi Kobayashi, Satsuki Matsumurai, Absonsuda Siripong, Thaithaworn Lerdwithayaprasith

    REMOTE SENSING OF THE MARINE ENVIRONMENT   6406   2006( ISSN:0277-786X )

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:SPIE-INT SOC OPTICAL ENGINEERING  

    This study shows match-up analysis of chlorophyll-a concentration in coastal area in Upper Gulf of Thailand. An applicability of atmospheric correction are investigated in turbid area. When a suspended matter concentration is over 7 g/m(3) in a mouth of Bangpakong river, atmospheric correction was failed, then chlorophyll-a concentration could not be estimated. Three algorithms which are MODIS (Moderate Resolution Imaging Spectroradiometer) standard, neural network for GLI (Global Imager) and regional empirical algorithm are compared using match-up data set. The regional algorithm has better correlation than other algorithms and its RMSE was minimum in three algorithms. MODIS standard algorithm has good performance in higher than 1 mg/m(3), however, CHL was overestimated in lower concentration.

    DOI: 10.1117/12.693999

    Web of Science

  • Atmospheric correction scheme for GLI in consideration of absorptive aerosol

    M.Toratani,H.Fukushima,H.Murakami,H.Kobayashi

    Proceedings of SPIE, Active and Passive Remote Sensing of the Oceans   5656   45 - 53   2005.1

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  • Optical properties of aerosols in the marine boundary layeraround Japan

    Yabuki, M, M. Shiobara, K. Hara, H. Kobayashi

    Nucleation and atmospheric aerosols, Kyoto Univ. Press.   772 - 775   2004

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    Language:English   Publishing type:(MISC) Introduction and explanation (international conference proceedings)  

  • A polar cloud analysis based on Micro-pulse Lidar measurements at Ny-Alesund, Svalbard and Syowa, Antarctica Reviewed

    M.Shiobara, M.Yabuki, H.Kobayashi

    Physics and Chemistry of the Earth   28 ( 28-32 )   1205 - 1212   2003.12

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    Language:English   Publishing type:Research paper (scientific journal)  

  • Optical properties of Asian dust aerosol by SeaWiFS and contemporaneous ground observation data

    H.Kobayashi,H.Fukushima,T.Murayama ,H.Yuichiro,S.Ohta

    Proceedings of SPIE, Ocean Remote Sensing and Imaging II   5155   124 - 131   2003.11

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    Language:English  

  • Seasonal variation of chemical composition of aerosols at Syowa Station, Antarctica in 2001 Reviewed

    H.Kobayashi, K.Hara, M.Shiobara, T.Yamanouchi, K.Osada, S.Ohta

    Polar Meteorology and Glaciology   17   68 - 80   2003.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  • Optical properties of aerosols in the marine boundary layer during a cruise from Tokyo, Japan to Fremantle, Australia Reviewed

    Masanori YABUKI, Masataka SHIOBARA, Hiroshi KOBAYASHI, Masahiko HAYASHI, Keiichiro HARA, Kazuo OSADA, Hiroaki KUZE, Nobuo TAKEUCHI

    Journal of the Meteorological Society of Japan   81 ( 1 )   151 - 162   2003.3

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    Language:English   Publishing type:Research paper (scientific journal)  

  • The Antarctic polar stratospheric clouds under the temperature perturbation by non-orographic inertia gravity waves observed by micro pulse lidar at Syowa station Reviewed

    T.Shibata, K.Sato, H.Kobayashi, M.Yabuki, M.Shiobara

    Journal of Geophysical Research   108 ( D3 )   4105 - 4113   2003.2

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    Language:English   Publishing type:Research paper (scientific journal)  

  • Optical properties of aerosols in the marine boundary layer during a cruise from Tokyo, Japan to Fremantle, Australia Reviewed

    Yabuki, M, Shiobara, M, Kobayashi, H, Hayashi, M, Hara, K, Osada, K, Kuze, H, Takeuchi, N

    Journal of the Meteorological Society of Japan   81 ( 1 )   151 - 162   2003

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2151/jmsj.81.151

    Web of Science

  • Atmospheric correction algorithm for satellite ocean color data over the Asian waters

    H.Fukushima,M.Toratani,H.Kobayashi,W.Takahashi,その他2名

    Proceedings of SPIE, Hyperspectral Remote Sensing of the Ocean   4154   18 - 30   2001.1

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    Language:English  

  • Radiative transfer model for satellite remote sensing of ocean colors in coastal zones Reviewed

    Journal of Global Environment Engineering   6   13 - 31   2000.12

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  • Radiative transfer model for satellite remote sensing of ocean color in coastal zone

    H Kobayashi, S Ohta, N Murao, H Tachibana, S Yamagata

    HYPERSPECTRAL REMOTE SENSING OF THE OCEAN   4154   193 - 203   2000( ISSN:0277-786X )

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:SPIE-INT SOC OPTICAL ENGINEERING  

    A radiative transfer model for a coupled atmosphere-ocean system was developed for satellite remote sensing of coastal pollution to estimate water-leaving radiance from polluted sea surfaces. The optical properties of suspended substances in the ocean such as phytoplankton (Skeletonema costatum and Heterosigma akashiwo), detritus, submicron particles, and inorganic particles were measured or estimated. The equation of radiative transfer in the coupled atmosphere-ocean system was solved by using the invariance imbedding method. The water-leaving radiance in clear and Case Il waters, turbid waters with soil particles, and red tide waters, were calculated. It was possible to estimate the soil particle concentration of water by using the ratio of the upward radiance at different wavelengths with a high resolution sensor for the land like the Landsat TM. However, estimating the red tide phytoplankton concentration using Landsat TM was difficult, because the water-leaving radiance varies little with phytoplankton concentration, and is affected by assumed amounts of detritus.

    Web of Science

  • リモートセンシングによる赤潮プランクトン濃度推定のための基礎的研究 Reviewed

    小林拓,太田幸雄,村尾直人,橘治国,山形定

    環境工学研究論文集   33   85 - 93   1996.11

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

  • Spectral changes of laser induced chlorophyll fluorescence in crop leaves by temperature, air-pollutants and genetic inheritances

    961 - 968   1994.1

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    Language:English   Publishing type:(MISC) Introduction and explanation (international conference proceedings)  

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Books and Other Publications

  • 富士山測候所のはなし

    佐々木一哉,片山葉子,松田千夏,土器屋由紀子( Role: Contributor2.1 鉱物粒子)

    成山堂書店  2022.7   ISBN:978-4-425-51481-6

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    Total pages:234   Language:Japanese   Book type:Scholarly book

  • 山岳科学

    松岡憲知, 泉山茂之, 楢本正明, 松本潔( Role: Contributorコラム:日本最高所の研究拠点-富士山測候所での研究活動-)

    古今書院  2020.9   ISBN:9784772242172

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    Total pages:127   Language:Japanese   Book type:Scholarly book

Presentations

  • 船上観測および衛星データから推定した南大洋における鉱物粒子負荷量

    小林拓,柴田風衣,原圭一郎,林政彦

    日本気象学会2023年度秋季大会  2023.10 

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    Event date: 2022.10

    Language:Japanese   Presentation type:Oral presentation(general)  

    Venue:仙台国際センター(宮城県仙台市)  

  • 偏光OPCで測定された南極観測船しらせ航路上の鉱物粒子濃度

    小林拓,近藤光,齋藤大河,平沢尚彦,小林史尚,石野咲子,柴田和宏,猪股弥生,原圭一郎,林政彦

    日本気象学会2022年度秋季大会  2022.10 

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    Event date: 2022.10

    Language:Japanese   Presentation type:Oral presentation(general)  

    Venue:北海道大学(北海道札幌市)  

  • 南極昭和基地においてスカイラジオメータで観測された大気エアロゾルの光学的厚さおよび光学特性の長期変動

    小林拓, 田中典章, 塩原匡貴, 平沢尚彦, 山内恭, 入江仁士, 日暮明子, 原圭一郎, 矢吹正教, 長田和雄, 林政彦

    エアロゾル科学・技術研究討論会  2021.8 

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    Language:Japanese   Presentation type:Oral presentation(general)  

    Venue:オンライン  

  • Maritime aerosol optical properties measured on the Korean R/V Araon in both Antarctic and Arctic regions International coauthorship International conference

    Hiroshi Kobayashi, Seohee Ahn, Young Jun Yoon, Masataka Shiobara

    The Ninth Symposium on Polar Science  2018.12 

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    Language:English   Presentation type:Poster presentation  

    Venue:Tokyo, Japan  

  • 新型船舶用オリオールメータによる海洋上大気エアロゾル観測

    小林拓, 野村勇介, 塩原匡貴

    第8回極域科学シンポジウム  2016.12 

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    Language:Japanese   Presentation type:Poster presentation  

    Venue:立川,東京  

  • DEVELOPMENT OF A NEW SHIPBORNE AUREOLEMETER TO MEASURE THE DIRECT- AND CIRCUM-SOLAR RADIATION International conference

    Hiroshi Kobayashi, Yusuke Nomura, Masataka Shiobara

    The 22nd International Symposium on Polar Sciences  2016.5 

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    Language:English   Presentation type:Poster presentation  

    Venue:Incheon, Korea  

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Industrial Property Rights

  • ブドウ評価デバイス及びその方法

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    Application no:特願2022-011331  Date applied:2022.1

  • 雲粒子観測用顕微鏡

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    Applicant:University of Yamanashi

    Application no:特願2015-61820  Date applied:2015.3

    Announcement no:特開2016-180714  Date announced:2016.10

  • 粒子測定装置

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    Application no:特願2011-103666  Date applied:2011.5

    Patent/Registration no:特許第5717136号  Date issued:2015.3

Teaching Experience (On-campus)

  • Practice in Atmospheric science

    2023Year  Type of subject:Professional education (undergraduate)

  • Environmental Science Laboratory

    2023Year  Type of subject:Professional education (undergraduate)

  • Meteorology

    2023Year  Type of subject:Professional education (undergraduate)

  • 教職履修カルテ

    2023Year

  • Research on Regional Environment Management A

    2023Year

  • Seminar on Regional Environment Management A

    2023Year

  • Dynamics of Atmospheric Environment

    2023Year  Type of subject:Master's (Graduate School)

  • Dynamics of Atmosphere and Hydrosphere

    2023Year  Type of subject:Master's (Graduate School)

  • Meteorology Major achievement

    2021Year

  • Earth Science

    2021Year

  • Meteorology Major achievement

    2020Year  Type of subject:Professional education (undergraduate)

  • Earth Science

    2020Year  Type of subject:Common education (undergraduate)

  • Dynamics of Atmosphere and Hydrosphere Major achievement

    2016Year  Type of subject:Master's (Graduate School)

  • Environmental Science Laboratory II Major achievement

    2016Year  Type of subject:Professional education (undergraduate)

  • 地球科学 Major achievement

    2016Year  Type of subject:Professional education (undergraduate)

  • Meteorology Major achievement

    2016Year  Type of subject:Professional education (undergraduate)

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Social Activities

  • 南極から探る地球の環境

    Role(s): Lecturer

    大学コンソーシアムやまなし  小学生・中学生のための生涯学習講座  山梨県立博物館  2023.8

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    Audience: General

    Type:Lecture

  • 南極からみる地球

    Role(s): Lecturer

    山梨県立博物館  かいじあむ南極教室  山梨県立博物館  2022.7

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    Audience: General

    Type:Lecture

  • 南極からみる地球環境

    Role(s): Lecturer

    山梨大学,読売新聞甲府支局  第14回連続市民講座  山梨大学  2022.4

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    Audience: General

    Type:Lecture

  • SSH高大連携講座

    Role(s): Lecturer

    山梨県立巨摩高等学校  SSH高大連携講座  2020.11

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    Audience: High school students

    Type:Visiting lecture

  • SSH高大連携講座

    Role(s): Lecturer

    山梨県立巨摩高等学校  SSH高大連携講座  2020.11

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    Audience: High school students

    Type:Visiting lecture

    講義全般を担当した

  • 南極からみる気候変動

    Role(s): Lecturer

    山梨県生涯学習推進センター  現代的課題講座  2019.5

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    Audience: General

    Type:Lecture

  • 宇宙からの地球環境監視

    Role(s): Lecturer

    山梨大学教育学部附属小学校  あおぎり講座  山梨大学  2018.10

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    Audience: Schoolchildren, Guardians

    Type:Visiting lecture

  • 降水のメカニズム

    Role(s): Lecturer

    山梨大学  山梨大学公開授業  山梨大学  2018.8

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    Audience: High school students

    Type:Visiting lecture

  • 南極から地球環境を考える

    Role(s): Lecturer

    放送大学  公開講演会  山梨県立図書館  2018.6

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    Audience: General

    Type:Lecture

  • 南極観測と地球環境

    Role(s): Lecturer

    山梨県立日川高等学校  総合的な学習の時間  2017.12

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    Audience: High school students

    Type:Visiting lecture

  • 降水のメカニズム

    Role(s): Lecturer

    2017.8

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    Audience: High school students

  • 南極へのバーチャルルアー

    Role(s): Lecturer

    放送大学  公開講演会  韮崎市立大村記念図書館  2017.6

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    Audience: General

    Type:Lecture

  • 南極から観る気候変動

    Role(s): Panelist, Lecturer

    2016.11

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    Audience: General

    Type:Lecture

  • ペンギンがすむ水の色

    Role(s): Lecturer

    広島大学  2016.9

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    Audience: General

    Type:Lecture

  • 南極での観測や生活の様子

    Role(s): Lecturer

    2016.7

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    Audience: General

    Type:Lecture

  • 南極から地球環境を考える

    Role(s): Lecturer

    2016.6

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    Audience: General

    Type:Lecture

  • 南極の海から地球の環境を探るしくみ

    海洋教育フォーラム  2015.12

  • 光を利用した環境計測

    山梨工業会神奈川支部電気情報会  2015.10

  • 一研究者からみた南極観測

    第8回アカデミックサロン  2015.10

  • 南極ってどんなところ?

    竜王図書館講演会  2015.8

  • PM2.5について

    山梨日日新聞  2013.3

  • 偏光光散乱式粒子計測器のソフトウェア開発

    Role(s): Advisor

    山梨技術工房  2009.4 - 2019.3

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    Audience: Company

    Type:Research consultation

    (製品名/商品名)
    偏光光散乱式粒子計測器
    (支援の種類)
    工業技術支援
    (貢献の度合い)
    ソフトウェア全般を開発している

  • NPO法人富士山測候所を活用する会

    Role(s): Organizing member

    富士山  2004.8 - 2019.3

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    Audience: Scientific

    富士山測候所を観測や教育など様々な目的に活用する

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