Observed flow compensation associated with the MOC at 26.5°N in the Atlantic
Observed flow compensation associated with the MOC at 26.5°N in the Atlantic
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DOI：
10.1126/science.1141293
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发表时间：
2007-08-17
期刊：
影响因子：
56.9
通讯作者：
Marotzke, Jochem
中科院分区：
文献类型：
--
作者：
Kanzow, Torsten;Cunningham, Stuart A.;Marotzke, Jochem
大西洋纬向翻转环流（MOC）提供了全球纬向热量输送的四分之一，它由许多独立的流动分量组成。由于缺乏足够的数据，这些组成部分中每一个的强度变化如何影响其他组成部分的强度尚不清楚。我们连续观察了1年的MOC在26.5度N使用密度，底压和洋流的终点测量;电缆测量横跨佛罗里达海峡;和风应力。不同的传输组件在很大程度上相互补偿，从而证实了我们的监测方法的有效性。MOC在观测期间的变化为+/- 5.7 x 10（6）立方米/秒，密度推断和风驱动的输送对MOC的贡献相等。
The Atlantic meridional overturning circulation (MOC), which provides one-quarter of the global meridional heat transport, is composed of a number of separate flow components. How changes in the strength of each of those components may affect that of the others has been unclear because of a lack of adequate data. We continuously observed the MOC at 26.5 degrees N for 1 year using end-point measurements of density, bottom pressure, and ocean currents; cable measurements across the Straits of Florida; and wind stress. The different transport components largely compensate for each other, thus confirming the validity of our monitoring approach. The MOC varied over the period of observation by +/- 5.7 x 10(6) cubic meters per second, with density-inferred and wind-driven transports contributing equally to it. We find evidence for depth-independent compensation for the wind-driven surface flow.