Transport of Anthropogenic and Dust Aerosol Observed at Cape Hedo, Okinawa

• TAKAMI Akinori

  Asian Environmental Research Group, National Institute for Environmental Studies

• IMAI Takanori

  Environmental Sciences, University of Tsukuba

• SHIMIZU Atsushi

  Asian Environmental Research Group, National Institute for Environmental Studies

• MATSUI Ichiro

  Atmospheric Environment Division, National Institute for Environmental Studies

• SUGIMOTO Nobuo

  Atmospheric Environment Division, National Institute for Environmental Studies

• HATAKEYAMA Shiro

  Asian Environmental Research Group, National Institute for Environmental Studies Environmental Sciences, University of Tsukuba

Bibliographic Information

Other Title

• 沖縄辺戸で観測された人為起源エアロゾルと黄砂の輸送
• オキナワ ヘド デ カンソク サレタ ジンイ キゲン エアロゾル ト コウサ ノ ユソウ

Abstract

We observed anthropogenic aerosols and dust particles (Kosa) successively from 7 to 9 November 2005 at Cape Hedo, Okinawa with high time resolution apparatuses. An aerosol mass spectrometer with the time resolution of 10 min showed that peaks due to anthropogenic aerosol appeared at 0:00 and 15:00 on November 7. The first peak was not associated with Kosa though the cold front passed. The second one was observed at the observation point just before Kosa arrived, which was measured by Lidar system with 15 min resolution. Kosa event continued after the anthropogenic aerosols decreased. The EC/OC ratio was constant at 0.2 during the whole event. This indicates that the anthropogenic aerosol continued to be transported even when Kosa dominated.<BR> The transport pattern of both anthropogenic aerosol and Kosa was as follows. The anthropogenic aerosol originated from Taiwan and southern China was transported associating with the cold front. Then, under the high pressure system moving toward east, both anthropogenic aerosol and Kosa were transported together from China. In this case, the anthropogenic aerosol arrived slightly earlier. Kosa was continuously transported under the second high pressure system. As a result, Kosa dominated the later period of this event.

Journal

• Earozoru Kenkyu

  Earozoru Kenkyu 21 (4), 341-347, 2006

  Japan Association of Aerosol Science and Technology

Keywords

• Kosa (dust)
• Anthropogenic Aerosol
• Cape Hedo
• AMS
• Lidar

Details

• CRID: 1390001204342126720
• NII Article ID: 10018792415
• NII Book ID: AN10041511
• DOI: 10.11203/jar.21.341
• COI: 1:CAS:528:DC%2BD28XhtlCqsb%2FO
• ISSN: 1881543X
• ISSN: 09122834
• NDL BIB ID: 8619314
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8619314
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed