气候变化领域集成服务门户(CCPortal): Mechanisms of future changes in equatorial upwelling: CMIP5 intermodel analysis

CCPortal

DOI	10.1175/JCLI-D-19-0128.1
	Mechanisms of future changes in equatorial upwelling: CMIP5 intermodel analysis
	Terada M.; Minobe S.; Deutsch C.
发表日期	2020
ISSN	0894-8755
起始页码	497
结束页码	510
卷号	33 期号:2
英文摘要	The future change in equatorial upwelling between 1971-2000 and 2071-2100 is investigated using data from 24 coupled climate models. The multimodel ensemble (MME) mean exhibits substantial equatorial upwelling decrease in the eastern Pacific and weaker decrease in the western Atlantic Ocean. The MME mean of upwelling change and intermodel variation of that are decomposed into distinct isopycnal and diapycnal components. In the Pacific, the diapycnal upwelling decreases near the surface, associated with a weakened Ekman pumping. The isopycnal upwelling decreases at depths of 75-200 m around the core of the Equatorial Undercurrent (EUC) due to flattening of the density layer in which it flows. Both the weakened Ekman pumping and the EUC flattening are induced by the locally weakened trade wind over the eastern Pacific basin. In the equatorial Atlantic, both the change in MME mean and the intermodel variation of upwellings are significantly related to the weakened trade wind and enhanced stratification, although these drivers are not independent. The results for the Pacific Ocean imply that future reduction in upwelling may have impacts at different depths by different mechanisms. In particular, the rapid warming of sea surface temperature in the eastern Pacific basin may be mainly caused by the near-surface diapycnal upwelling reduction rather than isopycnal upwelling reduction associated EUC flattening, which is important at deeper levels. © 2019 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Climate change; Climate models; Commerce; Surface waters; Coupled climate model; Different mechanisms; Eastern pacific; Equatorial undercurrents; Equatorial upwelling; Multi-model ensemble; Sea surface temperature (SST); Western Atlantic; Oceanography; climate change; climate modeling; Ekman pumping; ensemble forecasting; sea surface temperature; stratification; trade wind; undercurrent; upwelling; warming; Atlantic Ocean; Atlantic Ocean (West); Pacific Ocean; Pacific Ocean (East)
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171492
作者单位	Natural History Sciences, Graduate School of Science, Hokkaido University, Sapporo, Japan; Natural History Sciences, Graduate School of Science, and Earth and Planetary Sciences, Faculty of Science, Hokkaido University, Sapporo, Japan; School of Oceanography, University of Washington, Seattle, WA, United States
推荐引用方式 GB/T 7714	Terada M.,Minobe S.,Deutsch C.. Mechanisms of future changes in equatorial upwelling: CMIP5 intermodel analysis[J],2020,33(2).
APA	Terada M.,Minobe S.,&Deutsch C..(2020).Mechanisms of future changes in equatorial upwelling: CMIP5 intermodel analysis.Journal of Climate,33(2).
MLA	Terada M.,et al."Mechanisms of future changes in equatorial upwelling: CMIP5 intermodel analysis".Journal of Climate 33.2(2020).