Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1029/2011JD017219 |
Numerical simulation of spatial-temporal distribution of dust aerosol and its direct radiative effects on East Asian climate | |
Sun, Hui2,3; Pan, Zaitao1; Liu, Xiaodong2,4 | |
通讯作者 | Pan, Zaitao |
来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2012 |
卷号 | 117 |
英文摘要 | The latest regional climate model version 4 (RegCM4) coupled with a dust module developed at the International Center for Theoretical Physics (ICTP, Italy) is used to simulate the spatial-temporal distribution of dust aerosol and its climatic impact through direct radiative forcing over East Asia. Dust coupled and uncoupled experiments are carried out for the past decade (2000-2009). Comparison with satellite observed aerosol optical depth (AOD) shows that the coupled RegCM4 better reproduces spatial distribution of Asian dust loading that has been poorly resolved by general circulation models (GCM), capturing three surface dust concentration (SDC) centers in the Taklimakan desert, western Inner Mongolia, and northern Xinjiang respectively, with maximum values greater than 1000 mu g m(-3) in spring. The negative surface shortwave (SW) irradiance is strongest in spring over East Asia. Its -20 W m(-2) forcing near dust source centers results in surface temperature cooling by 0.8 degrees C from spring through summer. SW irradiance at the top of the atmosphere (TOA) is also negative with a minimum value of up to -8 W m(-2) in North China. Dust aerosol induced cooling leads to the formation of a cyclonic circulation in the lower troposphere in Northwest China that further excites downstream an anticyclonic circulation (the Yellow River Loop) and a cyclonic circulation (East China Sea, ECS). The northeasterly flow in southern China straddled by the anticyclone and cyclone acts to weaken the southwest monsoon in southeastern China and the surrounding sea. Supported by the dust-induced circulations, precipitation increases in cyclonic regions in Northwest China and ECS and decreases in the anticyclonic north-central China. |
类型 | Article |
语种 | 英语 |
国家 | USA ; Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000306237700004 |
WOS关键词 | REGIONAL CLIMATE ; MINERAL DUST ; OPTICAL-PROPERTIES ; SAHARAN DUST ; CHEMISTRY/AEROSOL MODEL ; FORECASTING SYSTEM ; NORTHERN CHINA ; SOIL-MOISTURE ; PRECIPITATION ; EMISSION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
来源机构 | 中国科学院地球环境研究所 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/173610 |
作者单位 | 1.St Louis Univ, Dept Earth & Atmospher Sci, St Louis, MO 63108 USA; 2.Chinese Acad Sci, SKLLQG, Inst Earth Environm, Xian, Peoples R China; 3.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China; 4.Xi An Jiao Tong Univ, Dept Environm Sci & Technol, Sch Human Settlements & Civil Engn, Xian 710049, Peoples R China |
推荐引用方式 GB/T 7714 | Sun, Hui,Pan, Zaitao,Liu, Xiaodong. Numerical simulation of spatial-temporal distribution of dust aerosol and its direct radiative effects on East Asian climate[J]. 中国科学院地球环境研究所,2012,117. |
APA | Sun, Hui,Pan, Zaitao,&Liu, Xiaodong.(2012).Numerical simulation of spatial-temporal distribution of dust aerosol and its direct radiative effects on East Asian climate.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,117. |
MLA | Sun, Hui,et al."Numerical simulation of spatial-temporal distribution of dust aerosol and its direct radiative effects on East Asian climate".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 117(2012). |
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