典型文献
Seasonal to sub-seasonal variations of the Asian Tropopause Aerosols Layer affected by the deep convection,surface pollutants and precipitation
文献摘要：
The Asian Tropopause Aerosols Layer(ATAL)refers to an accumulation of aerosols in the upper troposphere and lower stratosphere during boreal summer over Asia,which has a fundamental impact on the monsoon system and climate change.In this study,we primar-ily analyze the seasonal to sub-seasonal variations of the ATAL and the factors potentially influencing those variations based on MERRA2 reanalysis.The ability of the reanalysis to reproduce the ATAL is well validated by CALIPSO observations from May to October 2016.The results reveal that the ATAL has a synchronous spatiotemporal pattern with the devel-opment and movement of the Asian Summer Monsoon.Significant enhancement of ATAL intensity is found during the prevailing monsoon period of July-August,with two maxima centered over South Asia and the Arabian Peninsula.Owing to the fluctuations of deep con-vection,the ATAL shows an episodic variation on a timescale of 7-12 days.Attribution analy-sis indicates that deep convection dominates the variability of the ATAL with a contribution of 62.7％,followed by a contribution of 36.6％from surface pollutants.The impact of precip-itation is limited.The ATAL further shows a clear diurnal variation:the peak of ATAL inten-sity occurs from 17:30 to 23:30 local time(LT),when the deep convection becomes strongest;the minimum ATAL intensity occurs around 8:30 LT owing to the weakened deep convection and photochemical reactions in clouds.The aerosol components of the ATAL show different spatiotemporal patterns and imply that black carbon and organic carbon come mainly from India,whereas sulfate comes mainly from China during the prevailing monsoon period.
文献关键词：
中图分类号：
作者姓名：
Dongyou Wu;Tenglong Shi;Xiaoying Niu;Ziqi Chen;Jiecan Cui;Yang Chen;Xueying Zhang;Jun Liu;Mingxia Ji;Xin Wang;Wei Pu
作者机构：
College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China;Jilin Weather Modification Office,Changchun 130000,China;School of Earth System Science,Tianjin University,Tianjin 300072,China
文献出处：
引用格式：
[1]Dongyou Wu;Tenglong Shi;Xiaoying Niu;Ziqi Chen;Jiecan Cui;Yang Chen;Xueying Zhang;Jun Liu;Mingxia Ji;Xin Wang;Wei Pu-.Seasonal to sub-seasonal variations of the Asian Tropopause Aerosols Layer affected by the deep convection,surface pollutants and precipitation)[J].环境科学学报（英文版）,2022(04):53-65
A类：
Tropopause,ATAL,primar
B类：
Seasonal,sub,seasonal,variations,Asian,Aerosols,Layer,affected,by,deep,convection,surface,pollutants,precipitation,refers,accumulation,aerosols,upper,troposphere,lower,stratosphere,during,boreal,summer,over,which,has,fundamental,impact,monsoon,system,climate,change,this,study,ily,analyze,factors,potentially,influencing,those,MERRA2,reanalysis,reproduce,well,validated,CALIPSO,observations,from,May,October,results,reveal,that,synchronous,spatiotemporal,devel,opment,movement,Summer,Monsoon,Significant,enhancement,intensity,found,prevailing,period,July,August,two,maxima,centered,South,Arabian,Peninsula,Owing,fluctuations,shows,episodic,timescale,days,Attribution,indicates,dominates,variability,contribution,followed,limited,further,clear,diurnal,peak,occurs,local,LT,when,becomes,strongest,minimum,around,owing,weakened,photochemical,reactions,clouds,components,different,patterns,imply,black,carbon,organic,mainly,India,whereas,sulfate,China
AB值：
0.490563
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