气候变化领域集成服务门户(CCPortal): The South Atlantic Meridional Overturning Circulation and Mesoscale Eddies in the First GO-SHIP Section at 34.5°S

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DOI	10.1029/2020JC016962
	The South Atlantic Meridional Overturning Circulation and Mesoscale Eddies in the First GO-SHIP Section at 34.5°S
	Manta G.; Speich S.; Karstensen J.; Hummels R.; Kersalé M.; Laxenaire R.; Piola A.; Chidichimo M.P.; Sato O.T.; Cotrim da Cunha L.; Ansorge I.; Lamont T.; van den Berg M.A.; Schuster U.; Tanhua T.; Kerr R.; Guerrero R.; Campos E.; Meinen C.S.
发表日期	2021
ISSN	21699275
卷号	126 期号:2
英文摘要	The variability of the Atlantic meridional overturning circulation (AMOC) has considerable impacts on the global climate system. Past studies have shown that changes in the South Atlantic control the stability of the AMOC and drive an important part of its variability. That is why significant resources have been invested in a South (S)AMOC observing system. In January 2017, the RV Maria S. Merian conducted the first GO-SHIP hydrographic transect along the SAMOC-Basin Wide Array (SAMBA) line at 34.5°S in the South Atlantic. This paper presents estimates of meridional volume, freshwater (MFT), and heat (MHT) transports through the line using the slow varying geostrophic density field and direct velocity observations. An upper and an abyssal overturning cell are identified with a strength of 15.64 ± 1.39 Sv and 2.4 ± 1.6 Sv, respectively. The net northward MHT is 0.27 ± 0.10 PW, increasing by 0.12 PW when we remove the observed mesoscale eddies with a climatology derived from the Argo floats data set. We attribute this change to an anomalous predominance of cold core eddies during the cruise period. The highest velocities are observed in the western boundary, within the Brazil and the Deep Western Boundary currents. These currents appear as a continuous deep jet located 150 km off the slope squeezed between two cyclonic eddies. The zonal changes in water masses properties and velocity denote the imprint of exchange pathways with both the Southern and the Indian oceans. © 2020. American Geophysical Union. All Rights Reserved.
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/186503
作者单位	Laboratoire de Météorologie Dynamique, LMD-IPSL, École Polytechnique, ENS, CNRS, Paris, France; Departamento de Ciencias de la Atmósfera, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay; GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Cooperative Institute for Marine and Atmospheric Studies, University of Miami, Miami, FL, United States; NOAA Atlantic Oceanographic and Meteorological Laboratory, Miami, FL, United States; Center for Ocean-Atmospheric Prediction Studies, Florida State University, Tallahassee, FL, United States; Departamento de Oceanografía, Servicio de Hidrografía Naval (SHN), Buenos Aires, Argentina; Departamento de Ciencias de la Atmósfera y los Océanos, Universidad de Buenos Aires, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina; Instituto Franco-Argentino Sobre Estudios de Clima y Sus Impactos, CNRS-CONICET-UBA, Buenos Aires, Argentina; Oceanographic Institute, University of São Paulo, Sã...
推荐引用方式 GB/T 7714	Manta G.,Speich S.,Karstensen J.,et al. The South Atlantic Meridional Overturning Circulation and Mesoscale Eddies in the First GO-SHIP Section at 34.5°S[J],2021,126(2).
APA	Manta G..,Speich S..,Karstensen J..,Hummels R..,Kersalé M..,...&Meinen C.S..(2021).The South Atlantic Meridional Overturning Circulation and Mesoscale Eddies in the First GO-SHIP Section at 34.5°S.Journal of Geophysical Research: Oceans,126(2).
MLA	Manta G.,et al."The South Atlantic Meridional Overturning Circulation and Mesoscale Eddies in the First GO-SHIP Section at 34.5°S".Journal of Geophysical Research: Oceans 126.2(2021).