气候变化领域集成服务门户(CCPortal): The North Atlantic Current and its Volume and Freshwater Transports in the Subpolar North Atlantic, Time Period 1993

CCPortal

DOI	10.1029/2020JC016065
	The North Atlantic Current and its Volume and Freshwater Transports in the Subpolar North Atlantic, Time Period 1993–2016
	Stendardo I.; Rhein M.; Steinfeldt R.
发表日期	2020
ISSN	21699275
卷号	125 期号:9
英文摘要	The North Atlantic Current (NAC) supplies the subpolar gyre with warm and saline water from the subtropics as part of the upper branch of the Atlantic Meridional Overturning Circulation (AMOC). In the context of climate changes, the North Atlantic Ocean is one of the key regions to investigate the variability of the overturning circulation in which salinity and freshwater variability are playing a central role. Through the gravest empirical mode (GEM) method, we reconstructed salinity and velocity fields in the same spatiotemporal resolution as the sea surface height (SSH) product. The time series of salinity, freshwater, and volume transport are characterized by strong interannual variability related to most of the recently developed subpolar gyre indices. The variability of the freshwater transport in the study area is as high or even higher than the freshwater fluxes from the Arctic Ocean and thus needs to be considered for the impact of freshwater on the subpolar North Atlantic. Our analysis also revealed that the NAC import into the subpolar gyre is not only occurring in the western Atlantic close to the western boundary current. One o the NAC branches that forms at the Mann Eddy contributes about 15% of the volume transport and 28% of the freshwater transport crossing from the western into the eastern Atlantic north of 45°N. This branch has not been subject to the strong lateral mixing with freshwater at the western boundary, and thus, the salinity of this NAC pathway is higher than the one at the western boundary. ©2020. The Authors.
英文关键词	freshwater transport; geostrophic velocity; North Atlantic Current; North Atlantic Ocean; salinity; volume transport
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186700
作者单位	Institute of Environmental Physics, University of Bremen, Bremen, Germany; MARUM—Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
推荐引用方式 GB/T 7714	Stendardo I.,Rhein M.,Steinfeldt R.. The North Atlantic Current and its Volume and Freshwater Transports in the Subpolar North Atlantic, Time Period 1993–2016[J],2020,125(9).
APA	Stendardo I.,Rhein M.,&Steinfeldt R..(2020).The North Atlantic Current and its Volume and Freshwater Transports in the Subpolar North Atlantic, Time Period 1993–2016.Journal of Geophysical Research: Oceans,125(9).
MLA	Stendardo I.,et al."The North Atlantic Current and its Volume and Freshwater Transports in the Subpolar North Atlantic, Time Period 1993–2016".Journal of Geophysical Research: Oceans 125.9(2020).