Climate Change Impacts on the Patagonian Shelf Break Front

被引：20

作者：

Franco, B. C. ^{[1
,2
,3
]}

Ruiz-Etcheverry, L. A. ^{[1
,2
,3
]}

Marrari, M. ^{[4
]}

Piola, A. R. ^{[1
,3
,5
]}

Matano, R. P. ^{[6
]}

机构：

[1] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Buenos Aires, DF, Argentina

[2] Univ Buenos Aires, CONICET, Ctr Invest Mar & Atmosfera CIMA, Buenos Aires, DF, Argentina

[3] Inst Franco Argentino Estudio Clima & Impacto, Buenos Aires, DF, Argentina

[4] Consejo Nacl Invest Cientif & Tecn CONICET, Buenos Aires, DF, Argentina

[5] Serv Hidrog Naval SHN, Dept Oceanog, Buenos Aires, DF, Argentina

[6] Oregon State Univ, Coll Earth & Atmospher Sci, Corvallis, OR 97331 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2022年 / 49卷 / 04期

基金：

美国国家科学基金会;

关键词：

climate change; Southwestern Atlantic Ocean; shelf break front; slip surface; Brazil Current; MALVINAS CURRENT; 41-DEGREES-S; CONFLUENCE; TRANSPORT; CURRENTS;

D O I：

10.1029/2021GL096513

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We characterize long-term trends of sea surface temperature (SST), absolute dynamic topography, and chlorophyll-a (CHL) in the Patagonian shelf break front (SBF) using 27 years (1993-2019) of satellite data. Warming of the Argentinean shelf waters and the southwestward displacement of the Brazil-Malvinas Confluence (BMC) impact the northernmost extension of the SBF. Cooling of the Malvinas Current (MC) and the concurrent warming of the adjacent shelf waters lead to a significant increase of SST gradients along the outer shelf. The southwestward displacement of the BMC implies a similar shift of the SBF. An increase in CHL trend appears to be associated with southerly wind anomalies along the shelf break. We estimate a southward shift of the northernmost penetration of the MC of -0.11 +/- 0.076 degrees/decade.

引用

页数：9

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