气候变化领域集成服务门户(CCPortal): The Circumglobal Transport of Massive African Dust and Its Impacts on the Regional Circulation in Remote Atmosphere

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DOI	10.1175/BAMS-D-23-0072.1
	The Circumglobal Transport of Massive African Dust and Its Impacts on the Regional Circulation in Remote Atmosphere
	Bi, Hongru; Chen, Siyu; Zhang, Daizhou; Wang, Yong; Kang, Litai; Alam, Khan; Tang, Mingjin; Chen, Yu; Zhang, Yue; Wang, Danfeng
发表日期	2024
ISSN	0003-0007
EISSN	1520-0477
起始页码	105
结束页码	3
卷号	105 期号:3
英文摘要	Atmospheric dust from North Africa, the largest and most persistently active dust source over the world, spreads widely in the Northern Hemisphere and plays essential roles in the Earth environment evolution. During 7-24 June 2020, an extremely strong dust event occurred with its westward spreading modulated by the North Atlantic Oscillation (NAO) and its eastward spreading regulated by European blocking, ultimately resulting in the circumglobal transport of African dust. The Mediterranean low pressure linked to the European blocking dipole was the key to facilitating the eastward transport of dust. This record -breaking African dust episode caused a notable diurnal precipitation decrease of 0.98 mm day-1 over northeastern India and a decrease of 1.55 mm day-1 over central North America, which was ascribed to the effect of dust -induced radiative heating on large-scale circulation. It triggered a Rossby wave train and caused anomalous high pressure over northeastern India, which weakened the India summer monsoon and consequently inhibited the occurrence of precipitation. Dust -induced radiative heating also supported the stability in the anomalous warm high over North America, further repressing import of moisture from Atlantic. Ambient moisture and atmospheric instability also presented consistent variation over North America and India characterized as strengthen descending motion and sharply reduced moist convection. This study reports, for the first time, the strong modulation of regional circulation by circumglobally transported African dust, especially in Asia and North America. The new aspects on the unexpected consequences on moisture convection indicate broader roles that the dust may play in the global climate change.
英文关键词	Africa; Atmospheric circulation; Transport; Dust or dust storms; Radiative forcing
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001188237700001
来源期刊	BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299305
作者单位	Lanzhou University; Tsinghua University; Tsinghua University; University of Washington; University of Washington Seattle; Lanzhou University; University of Peshawar; Chinese Academy of Sciences; Guangzhou Institute of Geochemistry, CAS; Chinese Academy of Sciences; Guangzhou Institute of Geochemistry, CAS
推荐引用方式 GB/T 7714	Bi, Hongru,Chen, Siyu,Zhang, Daizhou,et al. The Circumglobal Transport of Massive African Dust and Its Impacts on the Regional Circulation in Remote Atmosphere[J],2024,105(3).
APA	Bi, Hongru.,Chen, Siyu.,Zhang, Daizhou.,Wang, Yong.,Kang, Litai.,...&Wang, Danfeng.(2024).The Circumglobal Transport of Massive African Dust and Its Impacts on the Regional Circulation in Remote Atmosphere.BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY,105(3).
MLA	Bi, Hongru,et al."The Circumglobal Transport of Massive African Dust and Its Impacts on the Regional Circulation in Remote Atmosphere".BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY 105.3(2024).