Warm-Route versus Cold-Route Interbasin Exchange in the Meridional Overturning Circulation
Warm-Route versus Cold-Route Interbasin Exchange in the Meridional Overturning Circulation
复制标题
经向翻转环流中的暖路与冷路跨流域交换
DOI:
10.1175/jpo-d-16-0249.1
复制
发表时间:
2017
影响因子:
3.5
通讯作者:
Jones, C. S.
中科院分区:
文献类型:
--
作者:
Cessi, Paola;Jones, C. S.
The interbasin exchange of the meridional overturning circulation (MOC) is studied in an idealized domain with two basins connected by a circumpolar channel in the southernmost region. Gnanadesikan’s conceptual model for the upper branch of the MOC is extended to include two basins of different widths connected by a reentrant channel at the southern edge and separated by two continents of different meridional extents. Its analysis illustrates the basic processes of interbasin flow exchange either through the connection at the southern tip of the long continent (cold route) or through the connection at the southern tip of the short continent (warm route). A cold-route exchange occurs when the short continent is poleward of the latitude separating the subpolar and subtropical gyre in the Southern Hemisphere (the zero Ekman pumping line); otherwise, there is warm-route exchange. The predictions of the conceptual model are compared to primitive equation computations in a domain with the same idealized geometry forced by wind stress, surface temperature relaxation, and surface salinity flux. Visualizations of the horizontal structure of the upper branch of the MOC illustrate the cold and warm routes of interbasin exchange flows. Diagnostics of the primitive equation computations show that the warm-route exchange flow is responsible for a substantial salinification of the basin where sinking occurs. This salinification is larger when the interbasin exchange is via the warm route, and it is more pronounced when the warm-route exchange flows from the wide to the narrow basin.
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DOI:
--
发表时间:
1961
期刊:
影响因子:
--
作者:
J. Reid
通讯作者:
J. Reid
影响因子:
3.2
作者:
R. Ferrari;S. Griffies;A. Nurser;G. Vallis
通讯作者:
G. Vallis
影响因子:
3.7
作者:
A. T. Parsons
通讯作者:
A. T. Parsons
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
C. Wolfe;P. Cessi
通讯作者:
P. Cessi
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
A. D. Boer;J. Toggweiler;D. Sigman
通讯作者:
D. Sigman