气候变化领域集成服务门户(CCPortal): Anthropogenic Decline of African Dust: Insights From the Holocene Records and Beyond

CCPortal

DOI	10.1029/2020GL089711
	Anthropogenic Decline of African Dust: Insights From the Holocene Records and Beyond
	Yuan T.; Yu H.; Chin M.; Remer L.A.; McGee D.; Evan A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	African dust exhibits strong variability on a range of time scales. Here we show that the interhemispheric contrast in Atlantic SST (ICAS) drives African dust variability at decadal to millennial timescales, and the strong anthropogenic increase of the ICAS in the future will decrease African dust loading to a level never seen during the Holocene. We provide a physical framework to understand the relationship between the ICAS and African dust activity: positive ICAS anomalies push the Intertropical Convergence Zone (ITCZ) northward and decrease surface wind speed over African dust source regions, which reduces dust emission and transport. It provides a unified framework for and is consistent with relationships in the literature. We find strong observational and proxy-record support for the ICAS-ITCZ-dust relationship during the past 160 and 17,000 years. Model-projected anthropogenic increase of the ICAS will reduce African dust by as much as 60%, which has broad consequences. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Wind; African dust; Dust emission; Holocenes; Intertropical convergence zone; Proxy records; Surface wind speed; Time-scales; Unified framework; Dust; dust; Holocene; human activity; intertropical convergence zone; proxy climate record; surface wind; timescale; wind velocity; Atlantic Ocean
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169463
作者单位	Earth Sciences Division, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Joint Center for Earth Systems Technology, University of Maryland at Baltimore County, Baltimore, MD, United States; Department of Earth, Atmosphere, and Planetary Sciences, Massachusetts Institute of Technology, Boston, MA, United States; Scrips Institute of Oceanography, University of California, San Diego, CA, United States
推荐引用方式 GB/T 7714	Yuan T.,Yu H.,Chin M.,et al. Anthropogenic Decline of African Dust: Insights From the Holocene Records and Beyond[J],2020,47(22).
APA	Yuan T.,Yu H.,Chin M.,Remer L.A.,McGee D.,&Evan A..(2020).Anthropogenic Decline of African Dust: Insights From the Holocene Records and Beyond.Geophysical Research Letters,47(22).
MLA	Yuan T.,et al."Anthropogenic Decline of African Dust: Insights From the Holocene Records and Beyond".Geophysical Research Letters 47.22(2020).