Analysis and numerical forecast of a regional fog-haze in North China plain

doi:10.7523/j.issn.2095-6134.2014.03.007

Abstract

Abstract:

We analyzed the weather situation, boundary layer structure, and PM_2.5 concentration during the haze-fog event of 27 to 31 Jan 2013 occurred in the North China plain(NCP). The weather conditions indicated that latitudinal circulation and weak pressure system controlled the NCP area during that period. There were continuous inversion layer and stable structure within the boundary layer. The surface and lower level wind was usually less 2 m/s, and relative humidity was higher. Such stable weather situation and high emissions were favorable to pollutant accumulation and fine aerosol's formation. Then, the high PM_2.5 concentration directly leaded to low visibility and heavy fog-haze. Real-time WRF-Chem model made a good forecast for the PM_2.5 concentration and the haze spatio-temporal distribution and evolution in the NCP area. The wind convergence and pollutant accumulation usually occurred along the mountain edge and in the NCP area.

Key words: North China plain, regional haze-fog, PM_2.5, meteorological condition, WRF-Chem forecast

CLC Number:

P413

ZHANG Xiaoling, TANG Yixi, XIONG Yajun, ZHANG Renjian, MENG Wei, CAO Xiaoyan. Analysis and numerical forecast of a regional fog-haze in North China plain[J]. , 2014, 31(3): 337-344.

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