The Role of Interocean Exchanges on Decadal Variations of the Meridional Heat Transport in the South Atlantic
The Role of Interocean Exchanges on Decadal Variations of the Meridional Heat Transport in the South Atlantic
复制标题
海洋间交换对南大西洋经向热传输年代际变化的作用
DOI：
10.1175/2011jpo4549.1
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发表时间：
2011
影响因子：
3.5
通讯作者：
M. Baringer
中科院分区：
文献类型：
--
作者：
S. Dong;S. Garzoli;M. Baringer
使用1980 - 2006年期间地球模拟器（OFES）海洋环流模式的输出，研究了南大西洋与太平洋和印度洋的海洋间水交换。本文的主要目的是研究大洋间交换在大西洋纬向翻转环流（AMOC）及其在南大西洋的纬向热输送（MHT）变化中的作用。AMOC强度增加1 Sv（1 Sv [ 10 6 m 3 s 21]）将导致MHT在约348 S时增加0.054 6 0.003 PW。348 S上的AMOC和MHT的主要特征是它们在1980 - 1993年期间的增长趋势。将输送分为边界流和海洋内部区域表明，输送的增加来自海洋或区域，这表明海洋或区域的监测对捕获AMOC和MHT在十年到更长时间尺度上的变化很重要。1980 - 1993年MHT的线性增加是由于太平洋和印度洋向南极辐合的平流热量增加所致，在总的热量辐合增加中，约三分之二来自印度洋通过Agulhas海流系统的贡献，这说明来自印度洋的暖水通道在研究期间348 S AMOC上分支向北流动的水中起着重要作用。
The 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 theSouthAtlantic.ThemeridionalheattransportfromOFESshowsasimilarresponseto AMOC variations to that derived from observations: a 1 Sv (1 Sv [ 10 6 m 3 s 21 ) increase in the AMOC strength would cause a 0.054 6 0.003 PW increase in MHT at approximately 348S. The main feature in the AMOC and MHT across 348S 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 oceaninteriorregion,suggestingthatitisimportanttomonitortheoceaninteriorregiontocapturechangesin the AMOC and MHT on decadal to longer time scales. The linear increase in the MHT from 1980 to 1993 is duetotheincreaseinadvectiveheatconvergedintotheSouthAtlanticfromthePacificandIndianOceans.Of the total increase in the heat convergence, about two-thirds is contributed by the Indian Ocean through the AgulhasCurrentsystem,suggestingthatthewarm-waterroutefromtheIndianOceanplaysamoreimportant role in the northward-flowing water in the upper branch of the AMOC at 348S during the study period.
影响因子：
5.2
作者：
E. van Sebille;A. Biastoch;P. V. van Leeuwen;W. D. de Ruijter
通讯作者：
E. van Sebille;A. Biastoch;P. V. van Leeuwen;W. D. de Ruijter
影响因子：
64.8
作者：
Biastoch, A.;Boening, C. W.;Lutjeharms, J. R. E.
通讯作者：
Lutjeharms, J. R. E.
影响因子：
64.8
作者：
Biastoch, A.;Boening, C. W.;Lutjeharms, J. R. E.
通讯作者：
Lutjeharms, J. R. E.