DOI: 10.1029/2018JC013907
Scopus记录号: 2-s2.0-85050799600
论文题名: Strong Mixing and Recirculation in the Northwestern Argentine Basin
作者: Valla D. ; Piola A.R. ; Meinen C.S. ; Campos E.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 7 起始页码: 4624
结束页码: 4648
语种: 英语
英文关键词: general circulation
; meridional overturning circulation
; South Atlantic
; water masses
; western boundary current
英文摘要: The Atlantic component of the Meridional Overturning Circulation (AMOC) is a key contributor to the global meridional transport of volume, salt, and heat, and thus plays a central role in global climate. As part of ongoing efforts to monitor the intensity and variability of the AMOC in the South Atlantic, hydrographic sections have been regularly occupied since 2009 near the western boundary along a zonal line at 34.5°S. Here this high-quality, high-resolution data set is analyzed to establish the average hydrographic conditions of the northwestern Argentine Basin and the water mass spatial and temporal variability. The water mass analysis also reveals the pathways of the flow in this region, which are further corroborated by full-depth direct velocity measurements. The repeated hydrographic sections capture an extremely rich vertical structure, characterized by seven distinct water mass layers of northern and southern origin, each with unique property signatures. Almost all of these layers exhibit a sharp zonally banded structure, which is indicative of recirculation cells offshore from the western boundary. The circulation at intermediate levels includes a previously undetected recirculation cell confined very close to the western boundary and superimposed on the classical intermediate water pathway beneath the South Atlantic subtropical gyre. The deep level flow is characterized by the Deep Western Boundary Current (DWBC) and a northward recirculation ~500 km east from the slope. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113563
Appears in Collections: 气候减缓与适应
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作者单位: Departamento Oceanografía, Servicio de Hidrografía Naval, Departamento Ciencias de la Atmósfera y los Océanos, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, and UMI/IFAECI, CONICET, Buenos Aires, Argentina; Atlantic Oceanographic and Meteorological Laboratory, Miami, FL, United States; Instituto Oceanográfico, Universidade de São Paulo, São Paulo, Brazil
Recommended Citation:
Valla D.,Piola A.R.,Meinen C.S.,et al. Strong Mixing and Recirculation in the Northwestern Argentine Basin[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(7)