A prototype system for observing the Atlantic Meridional Overturning Circulation – scientific basis, measurement and risk mitigation strategies, and first results
A prototype system for observing the Atlantic Meridional Overturning Circulation – scientific basis, measurement and risk mitigation strategies, and first results
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用于观测大西洋经向翻转环流的原型系统——科学基础、测量和风险缓解策略以及初步结果
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发表时间：
2008
期刊：
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通讯作者：
M. Baringer
中科院分区：
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作者：
T. Kanzow;J. Hirschi;C. Meinen;D. Rayner;S. Cunningham;J. Marotzke;W. Johns;H. Bryden;L. Beal;M. Baringer
大西洋经向翻转环流（MOC）携带了全球北向热量输送的四分之一。自2004年4月以来，一个监测主运行中心货运量的系统一直在运行。该系统的核心是一系列测量密度、海底压力和洋流的系泊传感器。一个战略，以减轻风险的可能部分故障的阵列，依靠备份和补充措施。MOC分解为五个组成部分，利用连续系泊观测，电缆测量横跨佛罗里达海峡，风应力数据。各部件相互补偿，表明系统工作可靠。MOC的全年平均强度为18.7±5.6 Sv，风驱动和密度推断输送对变化的贡献相等。数值模拟表明，西边界令人惊讶的快速密度变化部分与向西传播的行星波有关
The Atlantic Meridional Overturning Circulation (MOC) carries up to one quarter of the global northward heat transport in the Subtropical North Atlantic. A system monitoring the strength of the MOC volume transport has been operating since April 2004. The core of this system is an array of moored sensors measuring density, bottom pressure and ocean currents. A strategy to mitigate risks of possible partial failures of the array is presented, relying on backup and complementary measurements. The MOC is decomposed into five components, making use of the continuous moored observations, and of cable measurements across the Straits of Florida, and wind stress data. The components compensate for each other, indicating that the system is working reliably. The year-long average strength of the MOC is 18.7±5.6 Sv, with wind-driven and density-inferred transports contributing equally to the variability. Numerical simulations suggest that the surprisingly fast density changes at the western boundary are partially linked to westward propagating planetary waves