Ground-based network observation of Asian dust events of April 1998 in east Asia

Toshiyuki Murayama, Nobuo Sugimoto, Itsushi Uno, Kisei Kinoshita, Kazuma Aoki, Naseru Hagiwara, Zhaoyan Liu, Ichiro Matsui, Tetsu Sakai, Takashi Shibata, Kimio Arao, Byung Ju Sohn, Jae Gwang Won, Soon Chang Yoon, Tao Li, Jun Zhou, Huanling Hu, Makoto Abo, Kengo Iokibe, Ryuji KogaYasunobu Iwasaka


264 被引用数 (Scopus)


We coordinated a ground-based network that has been in use since 1997 to observe Asian dust during springtime. Huge Asian dust events that occurred in the middle of April 1998 were captured by this network. In this paper we present the organization of the network; a description of the instruments, including the lidar, sky radiometer, and optical particle counter; and the results of the observation, and offer discussions regarding the transport mechanism of Asian dust in east Asia using an on-line tracer model. We discussed the time series of the surface concentration and the height distribution of the dust. A cutoff cyclone generated during the dust episode was responsible for trapping and sedimentation during the transportation of the Asian dust, particularly in the southern parts of China and Japan. Horizontal dust images derived from NOAA/AVHRR clearly revealed the structure of the vortex. The lidar network observation confirmed the general pattern of dust height distribution in this event; the height of the major dust layer was about 3 km over Japan but was higher (4 to 5 km) in Seoul and Hefei. A thin dust layer in the upper troposphere was also commonly observed in Hefei and Japan. Evidence of the coexistence of dust and cirrus was shown by the polarization lidar. The lidar network observation of Asian dust and satellite remote sensing provide key information for the study of the transport mechanism of Asian dust. Further extension of the lidar network toward the interior of the continent and the Pacific Rim would reveal the greater global mechanism of the transportation.

ジャーナルJournal of Geophysical Research Atmospheres
出版ステータスPublished - 8月 27 2001

ASJC Scopus subject areas

  • 地球物理学
  • 海洋学
  • 林業
  • 水圏科学
  • 生態学
  • 水の科学と技術
  • 土壌科学
  • 地球化学および岩石学
  • 地表過程
  • 大気科学
  • 宇宙惑星科学
  • 地球惑星科学(その他)
  • 古生物学


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