Climate modulation of the Tibetan Plateau on haze in China

Atmospheric Chemistry and Physics

F.Liu¹  Y.Guo¹  G.Ding¹  X.Cheng¹  Y.Wang¹  X.Xu¹  C.Lu¹  D.Kristovich¹  T.Zhao¹  S. L.Gong¹ 

DOI  :  10.5194/acp-16-1365-2016

学科分类：大气科学

来源: Copernicus Publications

【 摘 要 】

Rapid increases in pollutant emissions in conjunction with stagnantmeteorological conditions result in haze pollution in China. Recent frequenthaze in China has attracted worldwide attention. Here we show a relationshipbetween the haze events and Tibetan Plateau (TP)'s environment and climatechanges. Based on observational data taken over recent decades, we identifycentral-eastern China (CEC) as a climatological large-scale “susceptibleregion” of frequent haze, which is harbored by the TP with its impact onmidlatitude westerly winds. The observational and modeling studiesdemonstrate that the interannual variations in the thermal forcing of TP arepositively correlated with the incidences of wintertime haze over CEC.Further analysis indicates that the climate warming of the TP induced changesin atmospheric circulation, driving frequent haze events in CEC. The frequenthaze occurrences in CEC are consistent with decreasing winter monsoon winds,intensifying downward air flows and increasing atmospheric stability in thelower troposphere over the CEC in association with upstream plateau's thermalanomalies. Therefore, variations of haze in China are related to mechanicaland thermal forcing by the TP. Our results also suggest that implications ofthe large TP topography for environment and climate changes should be takeninto account for air pollution mitigation policies in China.

【 授权许可】

Unknown