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首页> 外文期刊>Journal of Marine Research >The equatorial thermostad and subsurface countercurrents in the light of the dynamics of atmospheric Hadley cells
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The equatorial thermostad and subsurface countercurrents in the light of the dynamics of atmospheric Hadley cells

机译：根据大气Hadley细胞的动力学，赤道热区和地下逆流

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摘要

The simple Held and Hou (1980) nearly inviscid model of the axisymmetric atmospheric circulation, rationalizing the existence of Hadley cells, Jet Streams, and tropical homogenization of potential temperature and vorticity, is adapted to the oceanic subthermocline region. The meridional profile of radiative equilibrium temperature, which provides the driving in the atmospheric case, is replaced, in the oceanic case, by the large-scale equatorial doming of the thermocline. The meridiional structure of the equatorial thermostad and the existence, at its poleward flanks, of eastward subsurface countercurrents coincident with sharp potential vorticity gradients are thus explained via angular momentum redistribution by secondary ageostrophic over-turning cells in the meridional plane. Taking into account the existence of the equatorial undercurrent within the thermocline has little effect on the overall structure of the subthermocline solution at a given longitude, even though homogenization of properties is less efficient.
机译：简单的Held and Hou（1980）近似于轴对称的大气环流的无粘性模型，合理化了Hadley细胞，射流的存在以及潜在的温度和涡度的热带均质化，适合于大洋热线以下地区。辐射平衡温度的子午线轮廓在大气情况下提供了驱动力，在海洋情况下，则由温跃层的大规模赤道隆起所代替。因此，赤道热区的子午构造及其在极向侧翼处存在着与尖锐的潜在涡度梯度相吻合的东向地下逆流，这是通过子午面子午转折的次级子午角动量重新分布来解释的。考虑到温跃线内赤道暗流的存在，在给定的经度下，对亚温跃层溶液的整体结构影响很小，即使特性的均质化效率较低。

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