Why did a remarkably high PM_2.5 air pollution occur over China in the winter of 2013 ?

• Uno Itsushi

  Research Institute for Applied Mechanics, Kyushu University

• Yumimoto Keiya

  Meteorological Research Institute, Japan Meteorological Agency

• Hara Yukari

  Research Institute for Applied Mechanics, Kyushu University

• Itahashi Syuichi

  Central Research Institute of Electric Power Industry

• Kanaya Yugo

  Japan Agency for Marine-Earth Science and Technology

• Sugimoto Nobuo

  National Institute for Environmental Studies

• Ohara Toshimasa

  National Institute for Environmental Studies

Bibliographic Information

Other Title

• 何故2013 年冬季の中国でPM_2.5が高濃度になったか？
• 何故2013年冬季の中国でPM₂.₅が高濃度になったか?
• ナゼ 2013ネン トウキ ノ チュウゴク デ PM ₂.₅ ガ コウノウド ニ ナッタ カ?

Abstract

Both GEOS Chem chemical transport model and REAS emission inventory were used to analyze ten-years (2004–2013) of aerosol variation including PM_2.5 over East Asia. A remarkably high PM_2.5 concentration over central east China (CEC) in January 2013 was well simulated. We found that this heavy pollution occurred within the stable atmospheric condition due to the exceptionally weak Siberia high-pressure intensity (SHI), and pollutants were mainly trapped below the shallow PBL (< 1 km) over the CEC region. Comparison of the surface level black carbon (BC) concentration between 2012 and 2013 under fixed emission conditions shows that the BC level over the CEC in 2013 was about 30% higher than that in 2012. We also found that even if the concentration level over CEC is very high, the amount of horizontal transport flux in the region from CEC to Japan and the number of high pollution cases exceeding the threshold level did not correlate to the concentration of CEC region. The IPCC AR4 global model future prediction suggested that the SHI decreases due to global warming, and this indicated that the frequency of very high air pollution over the CEC might increase in the future if significant emission regulations over China are not conducted.

Journal

• Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi

  Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi 48 (6), 274-280, 2013

  Japan Society for Atmospheric Environment

Keywords

• PM<SUB>2.5</SUB>
• China
• REAS
• GEOS Chem chemical transport model
• global warming

Details

• CRID: 1390282679593170688
• NII Article ID: 10031197048
• NII Book ID: AN10512108
• DOI: 10.11298/taiki.48.274
• COI: 1:CAS:528:DC%2BC2cXhs1CjtLs%3D
• ISSN: 21854335
• ISSN: 13414178
• NDL BIB ID: 024998096
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024998096
• Web Site: https://search.jamas.or.jp/link/ui/2014103585
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed