气候变化领域集成服务门户(CCPortal): Global Impact of ENSO on Dust Activities with Emphasis on the Key Region from the Arabian Peninsula to Central Asia

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DOI	10.1029/2020JD034068
	Global Impact of ENSO on Dust Activities with Emphasis on the Key Region from the Arabian Peninsula to Central Asia
	Huang Y.; Liu X.; Yin Z.-Y.; An Z.
发表日期	2021
ISSN	2169897X
卷号	126 期号:9
英文摘要	The El Niño-Southern Oscillation (ENSO) has been found to be closely related to dust aerosol activities in many parts of the world. However, previous studies have rarely explored the ENSO’s impacts in the global context. In this study, the responses of the interannual variability of global atmospheric dust content to the ENSO cycle (including the eastern Pacific and central Pacific types) are examined using the MERRA-2 atmospheric aerosol reanalysis data. The ENSO-related tropical eastern Pacific sea surface temperature (SST) anomalies in the antecedent winter (November to January) have the most significant effect on the airborne dust content in a region from the Arabian Peninsula to Central Asia during the following spring and summer (April to July), which is identified as the key region (KR) of the ENSO’s impacts. The positive (negative) tropical eastern Pacific SST anomalies in the preceding winter during the El Niño (La Niña) years correspond to significantly reduced (increased) dust column content in the following spring and summer over the KR, which was confirmed using singular value decomposition. With the above (below)-normal winter SST anomalies in the tropical eastern Pacific, the Walker Circulation weakens (strengthens), and the divergence (convergence) over the western tropical Pacific and the convergence (divergence) over the southern tropical Indian Ocean in the lower troposphere are strengthened, which facilitate (restrain) the southward diffusion of airborne dust in the KR. Meanwhile, the increased (decreased) precipitation and soil moisture and the corresponding vegetation conditions help limit (promote) the dust emission in the KR during the El Niño (La Niña) years. © 2021. The Authors.
英文关键词	Arabian Peninsula; Central Asia; dust aerosol; ENSO; MERRA-2 reanalysis; singular value decomposition (SVD)
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185245
作者单位	Interdisciplinary Research Center of Earth Science Frontier, Beijing Normal University, Beijing, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China; Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China; Department of Environmental & Ocean Sciences, University of San Diego, San Diego, United States
推荐引用方式 GB/T 7714	Huang Y.,Liu X.,Yin Z.-Y.,et al. Global Impact of ENSO on Dust Activities with Emphasis on the Key Region from the Arabian Peninsula to Central Asia[J],2021,126(9).
APA	Huang Y.,Liu X.,Yin Z.-Y.,&An Z..(2021).Global Impact of ENSO on Dust Activities with Emphasis on the Key Region from the Arabian Peninsula to Central Asia.Journal of Geophysical Research: Atmospheres,126(9).
MLA	Huang Y.,et al."Global Impact of ENSO on Dust Activities with Emphasis on the Key Region from the Arabian Peninsula to Central Asia".Journal of Geophysical Research: Atmospheres 126.9(2021).