| 摘要: |
| 利用海浪模式WWIII(WaveWatch III)2008 年的模拟结果对海面Stokes 漂流、Stokes 输运、Stokes深度以及全球Langmuir 数的年平均分布特征和季节平均分布特征分别进行了详细的研究与分析。结果表明, 海面Stokes 漂流和Stokes 输运均呈现高纬度偏大的特征, 以南极绕极流海域最为突出。全球大部分海域Stokes 漂流影响深度在20 m 以内, 呈现大洋东部偏大, 西部偏小的分布特征。全球大部分海域的混合作用是剪切不稳定性和Langmuir 湍效应并存的状态, 甚至有些海域是以Langmuir 湍效应为主。因此, 在进行大尺度的海洋数值模拟时, 应该考虑波浪导致的混合效应。 |
| 关键词: Stokes 漂流 Stokes 输运 Stokes 深度 Langmuir 数 |
| DOI：10.11759/hykx20131206004 |
| 分类号: |
| 基金项目:国家重点基础研究发展计划(2013CB430304);国家高技术研究发展计划(2013AA09A505);国家科技支撑计划(2011BAC03B02);国家自然科学基金项目(41376013; 41376015; 41306006; 41206178);海洋公益性行业科研专项经费项目(20130531-8) |
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| Research on spatio-temporal characteristics of global Stokes drift in the ocean |
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| Abstract: |
| In this paper, the annual and seasonal distribution characteristics of Global Stokes drift, Stokes transport, Stokes depth and Langmuir numbers were studied. The results show that the values of Stokes drift velocity and Stokes transport were larger in the high latitudes, especially in the area of Antarctic Circumpolar Current. Most Stokes depths were not deeper than 20 m, and the depths were deeper in eastern seas than those in western seas. The analysis of Langmuir numbers show that the classical turbulence (the turbulence that driven by the shear) and Langmuir turbulence occurred together in most of global oceans, while the Langmuir turbulence was dominant in some areas. Therefore, it is suggested that the effects of Stokes drift on mixing in the oceanic mixed layer are important and should be taken into account in the parameterizations of ocean general circulation models. |
| Key words: Stokes drift Stokes transport Stokes depth Langmuir number |
