Chemical and Meteorological Feedbacks in the Formation of Intense Haze Events

Meng Gao, Gregory R. Carmichael, Yuesi Wang, Pablo E. Saide, Zirui Liu, Jinyuan Xin, Yunpeng Shan, Zifa Wang

Research output: Chapter in book/report/conference proceedingChapterpeer-review

Abstract

Intense haze events in China provide ideal opportunities to study meteorological and chemical feedbacks due to extremely high aerosol loadings. In this chapter, an online coupled meteorology-chemistry model, WRF-Chem, is applied to simulate impacts of aerosol feedbacks on meteorology and air quality during the January 2010 haze event over the North China Plain (NCP). The results show that the model reasonably reproduces well most meteorological, chemical and optical variables. Aerosols during this haze event can reduce surface downward shortwave radiation by 25.7% and planetary boundary layer height by 14.9%. Due to aerosol feedbacks, PM2.5 concentrations in urban Beijing increase by 11.2% at 14:00. The severe haze also enhances cloud droplet number concentrations, which can further affect cloud chemistry. These results indicate that aerosol feedbacks in the NCP, especially in urban regions, are important and should be considered when develop air pollution control and climate mitigation strategies.
Original languageEnglish
Title of host publicationAir Pollution in Eastern Asia
Subtitle of host publicationAn Integrated Perspective
EditorsIdir Bouarar, Xuemei Wang, Guy P. Brasseur
PublisherSpringer, Cham
Pages437–452
Number of pages16
Edition1st
ISBN (Electronic)9783319594897
ISBN (Print)9783319594880, 9783319866345
DOIs
Publication statusPublished - 19 Aug 2017

Publication series

NameISSI Scientific Report Series
Volume16

User-Defined Keywords

  • Aerosol feedbacks
  • Haze
  • PM2.5
  • WRF-Chem

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