气候变化领域集成服务门户(CCPortal): Poleward shift and intensified variability of Kuroshio-Oyashio extension and North Pacific Transition Zone under climate change

CCPortal

DOI	10.1007/s00382-021-05677-0
	Poleward shift and intensified variability of Kuroshio-Oyashio extension and North Pacific Transition Zone under climate change
	Navarra G.G.; Di Lorenzo E.
发表日期	2021
ISSN	0930-7575
卷号	56 期号:2021-07-08
英文摘要	The climate variability of the Kuroshio-Oyashio Extension (KOE) and North Pacific Transition Zone (NPTZ) exerts a strong control on marine populations that are sensitive to the strong productivity gradients between the subtropical and subpolar recirculation gyres. In observations, the relationship between KOE, NPTZ and productivity is evident in the first two dominant covariability modes between sea surface height and Chlorophyll-a anomalies, which are associated with a meridional shift in the location of the KOE (e.g. shift mode 1) and an intensification of the mean circulation of the KOE (e.g. intensification mode 2). To understand the projected impacts of anthropogenic forcing on the NPTZ, we examine these two dominant modes of variability in the Community Earth System Model Large Ensemble (CESM-LE) and an ensemble of climate models from the Coupled Model Intercomparing Project (CMIP5-E) under the Representative Concentration Pathways (RCP8.5). A significant poleward shift has been found in the KOE mean location associated with an equivalent shift of the Aleutian Low atmospheric pressure system. Superimposed to the changes of the mean, we find a significant increase (15–20%) in the variability of the shift mode in both the CESM-LE and CMPI5-E suggesting that variation in the meridional position of the NPTZ are also becoming stronger. These changes in variance of the shift mode are linked to an increase variability of the atmospheric forcing. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.
英文关键词	Climate change; Kuroshio-oyashio extension; Marine ecosystem variability; North pacific transition zone; Western boundary current
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183320
作者单位	Program in Ocean Science and Engineering, Georgia Institute of Technology, 311 First Drive NE, Atlanta, GA 30332, United States
推荐引用方式 GB/T 7714	Navarra G.G.,Di Lorenzo E.. Poleward shift and intensified variability of Kuroshio-Oyashio extension and North Pacific Transition Zone under climate change[J],2021,56(2021-07-08).
APA	Navarra G.G.,&Di Lorenzo E..(2021).Poleward shift and intensified variability of Kuroshio-Oyashio extension and North Pacific Transition Zone under climate change.Climate Dynamics,56(2021-07-08).
MLA	Navarra G.G.,et al."Poleward shift and intensified variability of Kuroshio-Oyashio extension and North Pacific Transition Zone under climate change".Climate Dynamics 56.2021-07-08(2021).