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contributor authorDong, Shenfu
contributor authorGarzoli, Silvia
contributor authorBaringer, Molly
date accessioned2017-06-09T16:40:45Z
date available2017-06-09T16:40:45Z
date copyright2011/08/01
date issued2011
identifier issn0022-3670
identifier otherams-72080.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4214043
description abstracthe interocean exchange of water from the South Atlantic with the Pacific and Indian Oceans is examined using the output from the ocean general circulation model for the Earth Simulator (OFES) during the period 1980?2006. The main objective of this paper is to investigate the role of the interocean exchanges in the variability of the Atlantic meridional overturning circulation (AMOC) and its associated meridional heat transport (MHT) in the South Atlantic. The meridional heat transport from OFES shows a similar response to AMOC variations to that derived from observations: a 1 Sv (1 Sv ≡ 106 m3 s?1) increase in the AMOC strength would cause a 0.054 ± 0.003 PW increase in MHT at approximately 34°S. The main feature in the AMOC and MHT across 34°S is their increasing trends during the period 1980?93. Separating the transports into boundary currents and ocean interior regions indicates that the increase in transport comes from the ocean interior region, suggesting that it is important to monitor the ocean interior region to capture changes in the AMOC and MHT on decadal to longer time scales. The linear increase in the MHT from 1980 to 1993 is due to the increase in advective heat converged into the South Atlantic from the Pacific and Indian Oceans. Of the total increase in the heat convergence, about two-thirds is contributed by the Indian Ocean through the Agulhas Current system, suggesting that the warm-water route from the Indian Ocean plays a more important role in the northward-flowing water in the upper branch of the AMOC at 34°S during the study period.
publisherAmerican Meteorological Society
titleThe Role of Interocean Exchanges on Decadal Variations of the Meridional Heat Transport in the South Atlantic
typeJournal Paper
journal volume41
journal issue8
journal titleJournal of Physical Oceanography
identifier doi10.1175/2011JPO4549.1
journal fristpage1498
journal lastpage1511
treeJournal of Physical Oceanography:;2011:;Volume( 041 ):;issue: 008
contenttypeFulltext


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