A remote effect of geothermal heat on the global thermohaline circulation
A remote effect of geothermal heat on the global thermohaline circulation
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DOI：
10.1029/2008jc005192
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发表时间：
2009-07
影响因子：
--
通讯作者：
L. S. Urakawa;H. Hasumi
中科院分区：
文献类型：
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作者：
L. S. Urakawa;H. Hasumi
[1]利用海洋环流模式（OGCM）数值模拟了地热对全球热盐环流（THC）的影响。地热强烈地增强了涡旋翻转环流（MOCs）。虽然早期的研究表明，地热可以产生大量的重力势能（GPE），但地热如何影响MOC的强度还有待澄清。这项研究表明，印度-太平洋的地热对大西洋MOC有远程影响，而大西洋的地热对印度-太平洋MOC的强度没有贡献。这种远程效应可以解释为GPE的跨流域运输及其能量转换为动能（KE），补偿与MOC增强相关的额外粘性耗散的结果。MOCs对地热的非对称响应可以用环流模式来解释。
[1] The effect of the geothermal heat on the global thermohaline circulation (THC) is numerically investigated with an ocean general circulation model (OGCM) under a realistic configuration. It is known that the geothermal heat strongly intensifies meridional overturning circulations (MOCs). Although earlier studies show that the geothermal heat can produce a significant amount of gravitational potential energy (GPE), it is left to be clarified how the geothermal heat affects the intensity of MOCs in terms of energetics. This study shows that the geothermal heat in the Indo-Pacific has a remote effect on the Atlantic MOC while that in the Atlantic does not contribute to the intensity of MOC in the Indo-Pacific. This remote effect can be accounted for as a result of an interbasin transport of GPE and its energy conversion to kinetic energy (KE) that compensates additional viscous dissipation associated with the MOC enhancement. The asymmetric response of MOCs to the geothermal heat can be explained by the circulation pattern.