Abstract:In the present paper,using the latest aerosol optical thickness(AOD) data(Collection 6) derived from the Moderate Resolution Imaging Spectroradiometer(MODIS) on board the Terra spacecraft,the National Centers for Environmental Prediction Final(NCEP FNL) Operational Global Analysis data,Climate Prediction Center(CPC) Merged Analysis of Precipitation(CMAP) data,CERES syn1deg Ed4 monthly average data,NCEP/National Center for Atmospheric Research(NCAR) reanalysis data from March 2000 to February 2017,the possible relation of AOD variations with winter monsoon is investigated.According to the AOD values,five different pollution levels are defined.The results show that the abnormally high AOD value in eastern China is related to the anomaly of wind speed.The negative correlation is most obvious in northern China.In winter,the averaged AOD over eastern China has a high negative correlation with the climatic variables.When the AOD is abnormally high(low),the short-wave solar radiation reaching the ground reduces(increases);the surface temperature declines(rises);the atmosphere is cooling(heating);the surface precipitation displays characteristics of "lower inland,and higher in the southeast" ("higher inland,lower in the southeast");and the influence of wind speed anomalies on the regional distribution of AOD anomalies is significantly different.When the AOD anomaly is high (low),the surface wind speed in northern China is small(large) and large(small) in the Jianghuai region.The case analysis shows that the anomalously high AOD in 2013 is due to the weak zonal wind and the weak Aleutian low pressure.These results have scientific significance for deepening our understanding of the relationship between the changes in winter monsoon and aerosol pollution.