Ocean viscosity and climate
Ocean viscosity and climate
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海洋粘度和气候
DOI：
10.1029/2007jc004515
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发表时间：
2008
影响因子：
--
通讯作者：
W. Large
中科院分区：
文献类型：
--
作者：
M. Jochum;G. Danabasoglu;M. Holland;Young‐Oh Kwon;W. Large
[1]利用一个完全耦合的气候模式的三个120年积分，探讨了参数化侧向海洋粘性对气候的影响。降低粘度导致海洋环流的普遍改善，但代价是增加了数值噪声。文中详细讨论了五个领域：赤道太平洋，热带不稳定波的出现减少了寒冷舌头的偏向；南大洋，南极绕极洋流增加了动能，但减少了输送；北冰洋，大西洋流入的情况有所改善，导致海冰分布更好；北太平洋，黑潮的路径更加现实，导致中纬度太平洋的温度更接近实际；北部边缘海，边界流较强，导致海冰明显减少。虽然大洋环流和海冰分布有所改善，但海洋吸热量、极地热量输送和大尺度大气环流没有明显变化。特别是，赤道冷舌的改进并没有更好地反映热带降水或厄尔尼诺现象。
[1] The impacts of parameterized lateral ocean viscosity on climate are explored using three 120-year integrations of a fully coupled climate model. Reducing viscosity leads to a generally improved ocean circulation at the expense of increased numerical noise. Five domains are discussed in detail: the equatorial Pacific, where the emergence of tropical instability waves reduces the cold tongue bias; the Southern Ocean, where the Antarctic Circumpolar Current increases its kinetic energy but reduces its transport; the Arctic Ocean, where an improved representation of the Atlantic inflow leads to a better sea-ice distribution; the North Pacific, where the more realistic path of the Kuroshio leads to more realistic temperatures across the midlatitude Pacific; and the northern marginal seas, where stronger boundary currents lead to significantly less sea-ice. Although the ocean circulation and sea-ice distribution improve, the oceanic heat uptake, the poleward heat transport, and the large scale atmospheric circulation are not changed significantly. In particular, the improvements to the equatorial cold tongue did not lead to better representation of tropical precipitation or El Nino.