气候变化领域集成服务门户(CCPortal): Geostrophic flows control future changes of oceanic eastern boundary upwelling

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DOI	10.1038/s41558-022-01588-y
	Geostrophic flows control future changes of oceanic eastern boundary upwelling
	Jing, Zhao; Wang, Shengpeng; Wu, Lixin; Wang, Hong; Zhou, Shenghui; Sun, Bingrong; Chen, Zhaohui; Ma, Xiaohui; Gan, Bolan; Yang, Haiyuan
发表日期	2023
ISSN	1758-678X
EISSN	1758-6798
英文摘要	Equatorward alongshore winds over major eastern boundary upwelling systems (EBUSs) drive intense upwelling via Ekman dynamics, surfacing nutrient-rich deep waters and promoting marine primary production and fisheries. It is generally thought, dating back to Bakun's hypothesis, that greenhouse warming should enhance upwelling in EBUSs by intensifying upwelling-favourable winds; yet this has not been tested. Here, using an ensemble of high-resolution climate simulations with improved EBUS representation, we show that long-term upwelling changes in EBUSs differ substantially, under a high-emission scenario, from those inferred by the wind-based upwelling index. Specifically, weakened or unchanged upwelling can coincide with intensified upwelling-favourable winds. These differences are linked to long-term changes of geostrophic flows that dominate upwelling changes in the Canary and Benguela currents and strongly offset wind-driven changes in the California and Humboldt currents. Our results highlight the controlling role of geostrophic flows in upwelling trends in EBUSs under greenhouse warming, which Bakun's hypothesis overlooked. Oceanic eastern boundary currents are regions with strong upwelling, which is expected to intensify with global warming through enhanced winds. Here the authors show that geostrophic flow dominates over wind effects on long-term upwelling changes for the major eastern boundary upwelling systems.
英文关键词	CLIMATE-CHANGE; COASTAL; INTENSIFICATION; WINDS
WOS研究方向	Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000928339300003
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282458
作者单位	Ocean University of China; Ocean University of China; Laoshan Laboratory
推荐引用方式 GB/T 7714	Jing, Zhao,Wang, Shengpeng,Wu, Lixin,et al. Geostrophic flows control future changes of oceanic eastern boundary upwelling[J],2023.
APA	Jing, Zhao.,Wang, Shengpeng.,Wu, Lixin.,Wang, Hong.,Zhou, Shenghui.,...&Yang, Haiyuan.(2023).Geostrophic flows control future changes of oceanic eastern boundary upwelling.Nature Climate Change.
MLA	Jing, Zhao,et al."Geostrophic flows control future changes of oceanic eastern boundary upwelling".Nature Climate Change (2023).