气候变化领域集成服务门户(CCPortal): Atlantic Ocean influence on Middle East summer surface air temperature

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DOI	10.1038/s41612-020-0109-1
	Atlantic Ocean influence on Middle East summer surface air temperature
	Ehsan M.A.; Nicolì D.; Kucharski F.; Almazroui M.; Tippett M.K.; Bellucci A.; Ruggieri P.; Kang I.-S.
发表日期	2020
ISSN	23973722
卷号	3 期号:1
英文摘要	Middle East surface air temperature (ME-SAT), during boreal summer (June to August: JJA), shows robust multidecadal variations for the period 1948−2016. Here, using observational and reanalysis datasets, as well as coupled atmosphere–ocean model simulations, we linked the observed summer ME-SAT variability to the multidecadal variability of sea surface temperature (SST) in the North Atlantic Ocean (AMV). This Atlantic−ME connection during summer involves ocean–atmosphere interactions through multiple ocean basins, with an influence from the Indian Ocean and the Arabian Sea. The downstream response to Atlantic SST is a weakening of the subtropical westerly jet stream that impacts summer ME-SAT variability through a wave-like pattern in the upper tropospheric levels. The Atlantic SST response is further characterized by positive geopotential height anomalies in the upper levels over the Eurasian region and a dipole-like pressure distribution over the ME in lower levels. For positive Atlantic SST anomalies this pressure gradient initiates anomalous low-level southerly flow, which transports moisture from the neighboring water bodies toward the extremely hot and dry ME landmass. The increase in atmospheric moisture reduces the longwave radiation damping of the SAT anomaly, increasing further ME-SAT. A suite of Atlantic Pacemaker experiments skillfully reproduces the North Atlantic–ME teleconnection. Our findings reveal that in observations and models the Atlantic Ocean acts as a critical pacemaker for summer ME-SAT multidecadal variability and that a positive AMV can lead to enhanced summer warming over the Middle East. © 2020, This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.
语种	英语
scopus关键词	air temperature; air-sea interaction; data set; decadal variation; jet stream; sea surface temperature; summer; troposphere; Arabian Sea; Atlantic Ocean; Atlantic Ocean (North); Indian Ocean; Middle East
来源期刊	npj Climate and Atmospheric Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178066
作者单位	International Research Institute for Climate and Society (IRI), Earth Institute at Columbia University, Palisades, NY, United States; Earth System Physics Section, International Centre for Theoretical Physics (ICTP), Trieste, Italy; Center of Excellence for Climate Change Research (CECCR), King Abdulaziz University, Jeddah, Saudi Arabia; Fondazione CMCC—Centro Euro-Mediterraneo sui Cambiamenti Climatici, Bologna, Italy; Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Indian Ocean Operational Oceanography Research Center, SOED, Second Institute of Oceanography, Hangzhou, China
推荐引用方式 GB/T 7714	Ehsan M.A.,Nicolì D.,Kucharski F.,et al. Atlantic Ocean influence on Middle East summer surface air temperature[J],2020,3(1).
APA	Ehsan M.A..,Nicolì D..,Kucharski F..,Almazroui M..,Tippett M.K..,...&Kang I.-S..(2020).Atlantic Ocean influence on Middle East summer surface air temperature.npj Climate and Atmospheric Science,3(1).
MLA	Ehsan M.A.,et al."Atlantic Ocean influence on Middle East summer surface air temperature".npj Climate and Atmospheric Science 3.1(2020).