气候变化领域集成服务门户(CCPortal): Variability and Trends of the South Atlantic Subtropical Gyre

CCPortal

DOI	10.1029/2020JC016405
	Variability and Trends of the South Atlantic Subtropical Gyre
	Drouin K.L.; Lozier M.S.; Johns W.E.
发表日期	2021
ISSN	21699275
卷号	126 期号:1
英文摘要	Previous studies have suggested that the South Atlantic subtropical gyre has been expanding, shifting poleward, and intensifying. We investigate these possibilities from an observational standpoint by analyzing the seasonal and interannual variability, and the long-term trends, in sea surface height, steric height, and ocean mass. For our analysis, we employ satellite altimetry from AVISO (1993–2018), steric height fields reconstructed from the Roemmich-Gilson Argo Climatology (2004–2016), and ocean mass fields from GRACE (2002–2019). Seasonal variabilities in the gyre position and size are influenced by the positions of the northern and eastern boundaries, as well as the Brazil-Malvinas Confluence. The gyre strength follows the seasonal heating and cooling of the upper ocean and is largely influenced by variability in the sea surface height gyre maximum. Variability in the ocean mass is driven by the wind stress curl and out of phase with the steric signal. Interannual changes to the southern boundary and strength of the gyre are related to the wind stress curl. We find a significant southward migration of the southern gyre boundary but no trends in the gyre size or gyre strength from 1993 to 2018. © 2020. The Authors.
英文关键词	ocean mass; sea surface height; South Atlantic; South Atlantic surface circulation; steric height; subtropical gyre
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/186534
作者单位	Earth and Ocean Sciences Department, Nicholas School of the Environment, Duke University, Durham, NC, United States; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Miami, FL, United States
推荐引用方式 GB/T 7714	Drouin K.L.,Lozier M.S.,Johns W.E.. Variability and Trends of the South Atlantic Subtropical Gyre[J],2021,126(1).
APA	Drouin K.L.,Lozier M.S.,&Johns W.E..(2021).Variability and Trends of the South Atlantic Subtropical Gyre.Journal of Geophysical Research: Oceans,126(1).
MLA	Drouin K.L.,et al."Variability and Trends of the South Atlantic Subtropical Gyre".Journal of Geophysical Research: Oceans 126.1(2021).