記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.atmosenv.2022.119261

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.atmosenv.2022.119287

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.11203/jar.37.136

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s10872-021-00625-2

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：公益社団法人 大気環境学会  

DOI： 10.11298/taiki.55.191

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5194/amt-12-6465-2019

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s10874-019-09391-4

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5194/acp-19-219-2019

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Copernicus Publications  

DOI： 10.5194/acp-18-18203-2018

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s10311-018-00820-6

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.2116/bunsekikagaku.67.333

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1103/PhysRevE.96.023003

Web of Science

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/s17081746

Web of Science

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/rs9060556

Web of Science

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.atmosenv.2017.03.044

Web of Science

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1038/s41598-017-00444-w

Web of Science

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jqsrt.2016.06.038

Web of Science

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.2322/tastj.14.Pn_7

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.4209/aaqr.2015.11.0632

Web of Science

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5194/acp-16-9863-2016

Web of Science

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：（MISC）総説・解説（国際会議プロシーディングズ）  

DOI： 10.1051/epjconf/201611908007

Scopus

その他リンク： http://orcid.org/0000-0002-1843-4291

担当区分：責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.11203/jar3027

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1117/12.21956

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER GEOPHYSICAL UNION  

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

担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.15748/jasse.2.1

Web of Science

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：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

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：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

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

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

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCI LTD  

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

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE  

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

その他リンク： http://orcid.org/0000-0002-6396-788X

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：公益社団法人 土木学会  

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

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：TAYLOR & FRANCIS LTD  

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

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：日本語   掲載種別：（MISC）速報，短報，研究ノート等（大学，研究機関紀要）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：日本エアロゾル学会  

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

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1029/2007JD009410

Web of Science

記述言語：英語   掲載種別：研究論文（学術雑誌）  

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：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

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：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

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：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

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

記述言語：英語   掲載種別：（MISC）総説・解説（国際会議プロシーディングズ）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語  

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.2151/jmsj.81.151

Web of Science

記述言語：英語  

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：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

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：（MISC）総説・解説（国際会議プロシーディングズ）  

記述言語：英語   会議種別：ポスター発表  

開催地：Incheon, Korea  

対象： 社会人・一般

種別：講演会

対象： 小学生,　保護者

種別：出前授業

対象： 高校生

種別：出前授業

対象： 社会人・一般

種別：講演会

対象： 高校生

種別：出前授業

対象： 高校生

対象： 社会人・一般

種別：講演会

対象： 社会人・一般

種別：講演会

対象： 社会人・一般

種別：講演会

対象： 社会人・一般

種別：講演会

対象： 社会人・一般

種別：講演会

対象： 企業

種別：研究指導

（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

対象： 学術団体

富士山測候所を観測や教育など様々な目的に活用する