Significant impacts of heterogeneous reaction on the chemico-physical properties of dust particles during severe dust events over East Asia in 2015

• Wang Zhe

  Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences (CAS) | Research Institute for Applied Mechanics, Kyushu University

• Pan Xiaole

  Center for Integrated Atmospheric Research, Kyushu University

• Li Jie

  Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences (CAS)

• Wang Zifa

  Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences (CAS)

• Fu Pingqing

  Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences (CAS)

• Yang Ting

  Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences (CAS)

• Kobayashi Hiroshi

  University of Yamanashi

• Shimizu Atsushi

  National Institute for Environmental Studies

• Sugimoto Nobuo

  National Institute for Environmental Studies

• Yamamoto Shigekazu

  Fukuoka Institute of Health and Environmental Sciences

• Uno Itsushi

  Research Institute for Applied Mechanics, Kyushu University

Abstract

Heterogeneous processes play an important role in changing the chemical, physical, optical, and radiative characters of dust particles at regional and global scales, especially in East Asia, where both the emissions of mineral dust and anthropogenic pollutants are huge. To investigate the chemical and physical impacts of heterogeneous reactions on dust particles, three dust and/or air pollution episodes were observed and simulated in Beijing, China and Fukuoka, Japan during 27 March and 2 April, 2015. The results confirmed that heterogeneous reactions were the major mechanisms producing coarse mode nitrate reaching 19 μg/m^3 in Beijing and 4 μg/m^3 in Fukuoka. We also found that heterogeneous processes and subsequent hygroscopic growth significantly changed the mixing state and size of dust particles. As a result of the internal mixing of nitrate, sulfate, and aerosol liquid water, the volume concentration of dust doubled when the relative humidity (RH) was relatively high (>80%), and the dust particles tended to be spherical when the volume fraction of dust coatings reached 20%.

Journal

• 九州大学応用力学研究所所報

  九州大学応用力学研究所所報 150 14-24, 2016-03

  Research Institute for Applied Mechanics, Kyushu University

Keywords

• Dust
• heterogeneous reaction
• hygroscopic growth
• mixing state
• particle size
• depolarization
• sphericity

Details

• CRID: 1390290699741340672
• NII Article ID: 120005817876
• NII Book ID: AA11459359
• DOI: 10.15017/1660358
• HANDLE: 2324/1660358
• ISSN: 13455664
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • CiNii Articles
• Abstract License Flag: Allowed