Study of asian dust phenomena in 2001-2003 using a network of continuously operated polarization lidars

Nobuo Sugimoto, Atsushi Shimizu, Ichiro Matsui, Itsushi Uno, Kimio Arao, Xuhui Dong, Shuli Zhao, Jun Zhou, Choo Hie Lee

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

We have conducted dust observations at a number of locations including Beijing, Hefei, Suwon, Fukue, Nagasaki, Tsukuba, and Sapporo using automated two-wavelength polarization lidars o study Asian dust phenomena, including generation, transport, and change during transport. We developed a method using the depolarization ratio for estimating the contributions of Asian dust and spherical air-pollution aerosols in observed aerosol mixtures. We analyzed the dust profiles statistically to derive climatological characteristics and year-on-year variations. We also studied dust source and transport path for each dust event using the regional chemical transport model CFORS. The statistical analysis clearly demonstrated the year-on-year variation of dust phenomena and the characteristics depending on the locations of the observational sites. Most major dust events in 2001 and 2002 originated in Inner Mongolia and/or Mongolia at the southern edge of a low-pressure area located in Siberia and were transported by strong westerlies. In 2003, the typical meteorological pattern for heavy dust cases accompanying a strong low in Siberia was not seen, except for one case in April. Furthermore, the lidar observation in Beijing suggests that less dust was generated in the source regions in Inner Mongolia and/or Mongolia, probably due to higher precipitation in 2003.

Original languageEnglish
Pages (from-to)145-157
Number of pages13
JournalWater, Air, and Soil Pollution: Focus
Volume5
Issue number3-6
DOIs
Publication statusPublished - Jan 1 2005

All Science Journal Classification (ASJC) codes

  • Water Science and Technology
  • Pollution
  • Earth-Surface Processes
  • Earth and Planetary Sciences(all)

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