Long-term trend and characterization of Aeolian dust in east China and Japan from 2001 to 2003

• KANAI Yutaka

  Geological Survay ofJapan (GSJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba

• OHTA Atsuyuki

  Geological Survay ofJapan (GSJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba

• KAMIOKA Hikari

  Geological Survay ofJapan (GSJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba

• TERASHIMA Shigeru

  Geological Survay ofJapan (GSJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba

• IMAI Noboru

  Geological Survay ofJapan (GSJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba

• KANAI Michiyo

  Geological Survay ofJapan (GSJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba

• SHIMIZU Hiroshi

  Hiroshima University

• TAKAHASHI Yoshio

  Hiroshima University

• KAI Kenji

  Nagoya University

• HAYASHI Masahiko

  Fukuoka University

• ZHANG Renjian

  Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing

• SHENG Lifang

  Institute of Physical Oceanography, Ocean University of China, Qingdao

書誌事項

タイトル別名

• Characterization of Aeolian Dust in East China and Japan from 2001 to 2003

抄録

In order to elucidate the variation and characterization of dust particles that originate in the arid and semi-arid regions of inland Asia and are transported to Japan, we established a sampling network system in east China and Japan and collected aeolian dust under the Japan-China joint project “ADEC”. Monitoring of the total suspended particle (TSP) and size-segregated dust concentrations were carried out in Beijing, Qingdao and Hefei in China, and Fukuoka, Nagoya, Tsukuba and Naha in Japan. The seasonal variations showed the general trend that the aerosol concentration was high in spring and low in summer, though it sometimes became high in winter in Qingdao. The aerosol size distribution was bimodal. One peak at around 0.5 μm diameter corresponds to panicles of anthropogenic origin, in which the main components are black carbon, NH₄⁺ and SO₄²⁻, and some elements such as Pb, Cd, Sn, Sb and Bi are abundant. The other peak at around 4-5 μm diameter corresponds to mineral dust of soil origin, in which the main soluble components are Na⁺, Ca²⁺, NO₃⁻ and Cl⁻. The coarser particles increased when a dust event occurred. The IOP program was conducted in the spring of 2002 (IOP-1) and 2003 (IOP-2). The dust concentration during IOP-1 was high in China, particularly in Beijing. The average dust concentration during a dust event decreased in the order of Beijing > Qingdao > Hefei and Beijing > Fukuoka > Nagoya > Tsukuba > Naha. However, there were few observable dust events during IOP-2. From the results of continuous monitoring, the dust concentration during periods without dust events seemed to be almost equal at all monitoring locations in Japan. This suggests that the segregation of dust occurs in China and fine dust particles are transported to Japan. Seasonal variations of TSP, PM₁₁ (paniculate size is less than 11 μm), PM_2.1 (less than 2.1 μm) and mineral matter (larger than 2.1 μm) contents were studied. It was shown that these values decrease with distance from the source area.

収録刊行物

• 気象集誌. 第2輯

  気象集誌. 第2輯 83A 73-106, 2005

  公益社団法人 日本気象学会

キーワード

• Atmospheric Science

詳細情報

• CRID: 1390282681480506368
• NII論文ID: 110001817417
• NII書誌ID: AA00702524
• DOI: 10.2151/jmsj.83a.73
• ISSN: 21869057
• ISSN: 00261165
• NDL書誌ID: 7317233
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7317233
• Web Site: http://www.jstage.jst.go.jp/article/jmsj/83A/0/83A_0_73/_pdf
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10612454
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • NDL-Digital
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可