The role of meso-scale eddies in mixed layer deepening and mode water formation in the western North Pacific
The role of meso-scale eddies in mixed layer deepening and mode water formation in the western North Pacific
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DOI：
10.1007/s10872-011-0049-9
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发表时间：
2012-02-01
影响因子：
2.3
通讯作者：
Sato, Kanako
中科院分区：
文献类型：
--
作者：
Kouketsu, Shinya;Tomita, Hiroyuki;Sato, Kanako
利用卫星海面高度异常数据和Argo剖面浮标数据合成了北太平洋反气旋和气旋涡中心周围的混合层深度分布。复合分布表明，在冬末，与外部相比，在反气旋（气旋）涡流核心内部更频繁地（更少）观察到更深的混合层。这种关系在 140A 度 E-160A 度 W 和 35A 度 N-40A 度 N 的区域最为明显，这里深层混合层的温度和盐度与较轻的中心模式水 (L-CMW) 相似。一个简单的一维整体混合层模型表明，强的海面热量和动量通量以及弱的预先存在的分层都有助于深层混合层的形成。这些条件与反气旋涡流有关，表明这些涡流对于模式水域（特别是 L-CMW）的形成很重要。
Distributions of mixed layer depths around the centers of anti-cyclonic and cyclonic eddies in the North Pacific Ocean were composited by using satellite-derived sea surface height anomaly data and Argo profiling float data. The composite distributions showed that in late winter, deeper mixed layers were more (less) frequently observed inside the cores of the anti-cyclonic (cyclonic) eddies than outside. This relationship was the clearest in the region of 140A degrees E-160A degrees W and 35A degrees N-40A degrees N, where the temperature and salinity of the deep mixed layers were similar to those of the lighter variety of central mode water (L-CMW). A simple one-dimensional bulk mixed layer model showed that both strong sea-surface heat and momentum fluxes and weak preexisting stratification contributed to formation of the deep mixed layer. These conditions were associated with the anti-cyclonic eddies, suggesting that these eddies are important in the formation of mode waters, particularly L-CMW.