The spacing of Langmuir circulation under modest wind
The spacing of Langmuir circulation under modest wind
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DOI：
10.1007/s00343-012-1201-0
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发表时间：
2012-07
影响因子：
--
通讯作者：
Shuang Li;Jinbao Song
中科院分区：
文献类型：
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作者：
Shuang Li;Jinbao Song
利用大涡模拟（LES）模式计算了中等风场下朗缪尔环流（LC）的空间分布特征。LC是一种有组织的垂直运动，表现为浮力物质形成几乎与风向平行的线。大涡模拟计算的速度水平分布显示出LC形成的清晰的线条。这些线生长并彼此平行一段时间，我们称之为稳定状态，然后它们最终形成Y结。在稳定状态下，我们通过平均每两条平行线的间距来计算它们之间的间距。从统计学上看，154次试验（7个风速情况，每个22次试验运行）的间距结果显示间距与风速以及混合层深度之间的高度相关性。空间和风的关系是重要的，未来的LC参数化的上层海洋混合。
Spacing characteristics of Langmuir circulation (LC) are computed by large eddy simulation (LES) model under modest wind. LC is an organized vertical motion, evidenced as buoyant materials forming lines nearly parallel to the wind direction. The horizontal distribution of velocity computed by LES shows clear lines formed by LC. These lines grow and parallel to each other for a while, which we call the stable state, before they finally form Y-junctions. We computed spacing between every two parallel lines by averaging them under the stable state. Statistically, spacing results of 154 tests (seven wind speed cases of 22 test runs each) show high correlations between spacing and wind speed, as well as mixed layer depth. The relationship of spacing and wind is important for future LC parameterization of upper-ocean mixing.