气候变化领域集成服务门户(CCPortal): Colder Eastern Equatorial Pacific and Stronger Walker Circulation in the Early 21st Century: Separating the Forced Response to Global Warming From Natural Variability

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DOI	10.1029/2022GL101020
	Colder Eastern Equatorial Pacific and Stronger Walker Circulation in the Early 21st Century: Separating the Forced Response to Global Warming From Natural Variability
	Heede, Ulla K.; Fedorov, Alexey V.
发表日期	2023
ISSN	0094-8276
EISSN	1944-8007
卷号	50 期号:3
英文摘要	Since the early 1990s the Pacific Walker circulation shows a multi-decadal strengthening, which contradicts future model projections. Whether this trend, evident in many climate indices especially before the 2015 El Nino, reflects the coupled ocean-atmosphere response to global warming or the negative phase of the Pacific Decadal Oscillation (PDO) remains debated. Here we show that sea surface temperature trends during 1980-2020 are dominated by three signals: a spatially uniform warming trend, a negative PDO pattern, and a Northern Hemisphere-Indo-West Pacific warming pattern. The latter pattern, which closely resembles the transient ocean thermostat-like response to global warming emerging in a subset of CMIP6 models, shows cooling in the central-eastern equatorial Pacific but warming in the western Pacific and tropical Indian Ocean. Together with the PDO, this pattern drives the Walker circulation strengthening in the equatorial band. Historical simulations appear to underestimate this pattern, contributing to the models' inability to replicate the Walker cell strengthening.
英文关键词	climate change; tropical Pacific; Walker circulation; climate dynamics; model projections
语种	英语
WOS研究方向	Geosciences, Multidisciplinary
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000949573100021
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/281234
作者单位	Yale University; University of Colorado System; University of Colorado Boulder; Sorbonne Universite; Museum National d'Histoire Naturelle (MNHN); Universite Paris Cite
推荐引用方式 GB/T 7714	Heede, Ulla K.,Fedorov, Alexey V.. Colder Eastern Equatorial Pacific and Stronger Walker Circulation in the Early 21st Century: Separating the Forced Response to Global Warming From Natural Variability[J],2023,50(3).
APA	Heede, Ulla K.,&Fedorov, Alexey V..(2023).Colder Eastern Equatorial Pacific and Stronger Walker Circulation in the Early 21st Century: Separating the Forced Response to Global Warming From Natural Variability.GEOPHYSICAL RESEARCH LETTERS,50(3).
MLA	Heede, Ulla K.,et al."Colder Eastern Equatorial Pacific and Stronger Walker Circulation in the Early 21st Century: Separating the Forced Response to Global Warming From Natural Variability".GEOPHYSICAL RESEARCH LETTERS 50.3(2023).