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An Unreported Asian Dust (Kosa) Event in Hokkaido, Japan: A Case Study of 7 March 2016

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/67086

Title: An Unreported Asian Dust (Kosa) Event in Hokkaido, Japan: A Case Study of 7 March 2016
Authors: Yasunari, Teppei J. Browse this author
Niwano, Masashi Browse this author
Fujiyoshi, Yasushi Browse this author →KAKEN DB
Shimizu, Atsushi Browse this author
Hayasaki, Masamitsu Browse this author
Aoki, Teruo Browse this author
da Silva, Arlindo M. Browse this author
Holben, Brent N. Browse this author
Matoba, Sumito Browse this author →KAKEN DB
Murao, Naoto Browse this author →KAKEN DB
Yamagata, Sadamu Browse this author
Kim, Kyu-Myong Browse this author
Issue Date: 1-Jun-2017
Publisher: 公益社団法人 日本気象学会
Journal Title: SOLA (Scientific Online Letters on the Atmosphere)
Volume: 13
Start Page: 96
End Page: 101
Publisher DOI: 10.2151/sola.2017-018
Abstract: Monitoring particulate matter is essential to alert the public about health risks. The Terra/MODIS true color image clearly captured a yellow band over Hokkaido prefecture in Japan on 7 March 2016. We investigated whether this event was an Asian dust (Kosa) transport or not with the ground-based observations in Sapporo and Takikawa in Hokkaido and NASA's MERRA-2 re-analysis data. The timing of increased particle number concentrations (PNCs; greater than 0.5 mu m) was clearly measured by a low-cost aerosol sensor at Sapporo and Takikawa in the early afternoon. For this particle size range, the PNC by this aerosol sensor had greater agreement with another commercial instrument for the 1-hourly mean data. The lidar data at Takikawa and NASA's AERONET at Sapporo also implied the increased dust particles (i.e., dominance of non-spherical and coarse particles, respectively), which supported that the PNC increase was due to the dust transport. The hourly PM2.5 data in Sapporo significantly increased in the evening rather than around the noon to early afternoon. We concluded that this event was judged as an Asian dust (Kosa) event in Hokkaido starting from the early afternoon, which was, however, not reported by Japan Meteorological Agency (JMA) based on their visible observations.
Type: article
URI: http://hdl.handle.net/2115/67086
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 安成 哲平

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