气候变化领域集成服务门户(CCPortal): Circulation and Cross-Shelf Exchanges in the Northern Shelf Region of the Southwestern Atlantic: Kinematics

CCPortal

DOI	10.1029/2020JC016959
	Circulation and Cross-Shelf Exchanges in the Northern Shelf Region of the Southwestern Atlantic: Kinematics
	Combes V.; Matano R.P.; Palma E.D.
发表日期	2021
ISSN	21699275
卷号	126 期号:4
英文摘要	A high-resolution ocean model is used to characterize the circulation and cross-shelf exchanges in the Brazilian/Uruguayan portion of the southwestern Atlantic shelf. Cross-shelf exchanges are strongly modulated by the bottom topography. There is ∼1.2 Sv of on-shelf transport between 21°S and 25.2°S, and ∼1.6 Sv of off-shelf transport between 35°S and 25.2°S. North of 25.2°S, the cross-shelf exchanges show a two-layer structure with an off-shelf flow in the upper 50m and on-shelf flow deep below. A Lagrangian diagnostic shows that ∼0.15 Sv of deep waters from the Brazil Current (z > 200 m) are injected into the shelf. Mixing with ambient waters produces a spicier (warmer and saltier) water mass, which is ejected into the open ocean in the southern region. Backward in-time particle's trajectories analysis reveals that 95% of the southward shelf transport at 32°S originates in the open ocean at 22°S. Our model diagnostics show that there is a very limited connectivity between the shelf regions north and south of Cabo Frio. Correlation analysis shows no significant influence of El Niño Southern Oscillation (ENSO) and Southern Annular Mode (SAM) on the time variability of the cross-shelf transport. Cross-shelf transports, however, are significantly correlated with the local wind stress variability. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Brazil Current; cross-shelf exchanges; shelf circulation
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/186383
作者单位	College of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States; Departamento de Física, Universidad Nacional del Sur e Instituto Argentino de Oceanografía (CONICET), Bahía Blanca, Argentina
推荐引用方式 GB/T 7714	Combes V.,Matano R.P.,Palma E.D.. Circulation and Cross-Shelf Exchanges in the Northern Shelf Region of the Southwestern Atlantic: Kinematics[J],2021,126(4).
APA	Combes V.,Matano R.P.,&Palma E.D..(2021).Circulation and Cross-Shelf Exchanges in the Northern Shelf Region of the Southwestern Atlantic: Kinematics.Journal of Geophysical Research: Oceans,126(4).
MLA	Combes V.,et al."Circulation and Cross-Shelf Exchanges in the Northern Shelf Region of the Southwestern Atlantic: Kinematics".Journal of Geophysical Research: Oceans 126.4(2021).