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Rainfall effect on wind waves and the turbulence beneath air-sea interface

ISSN号：0253-505X
期刊名称：Acta Oceanologica Sinica
时间：2013
页码：10-20
分类：TN929.12[电子电信—通信与信息系统;电子电信—信息与通信工程] P716.22[天文地球—海洋科学]
作者机构：[1]Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China, [2]Department of Marine, Earth and Atmospheric Sciences, North Carolina State University,Raleigh 27695-8208, USA
相关基金：The National Basic Research Program of China under contract Nos 2009CB421201 and 2005CB422301; the National Natural Science Foundation of China under contract Nos 41076007, 40676014, 40490263 and 40830959.
相关项目：基于现场观测和海洋遥感的气体交换速率研究

关键词：风浪水槽, 降雨影响, 湍流效应, 实验室实验, 界面, 高风速, 耗散率, 湍流动能, rainfall, wind wave, wave age, turbulence, turbulent kinetic energy

中文摘要：

风波浪和骚乱上的降雨效果在一辆大风波浪坦克通过实验室实验被调查。风波浪以低风速度总体上被抑制，这被发现，但是以高风速度被提高。风上的雨的这双效果随雨率的增加挥动增加，当降雨区域长度的影响不是看得见的时。以低风速度，当波浪严重地被抑制，相应骚乱显著地由降雨以驱散率是的狂暴的动能(TKE ) 提高了。以高风速度，当风波浪同时被提高时， TKE 驱散率的 augment 被压制。在这块地里，然而，降雨通常妨碍波浪的发展。为了解释降雨的这个矛盾，在波浪上完成，关于到波浪在的情况下的从骚乱的精力转移的可能性光谱波浪重叠的山峰骚乱的惯性的子域被假定。在实验室实验解释煤气的转移速度的抑制现象能被使用，并且 TKE 驱散的变化与墙的法律相比在海表面附近评价。

英文摘要：

Rainfall effects on wind waves and turbulence are investigated through the laboratory experiments in a large wind-wave tank. It is found that the wind waves are damped as a whole at low wind speeds, but are enhanced at high wind speeds. This dual effect of rain on the wind waves increases with the increase of rain rate, while the influence of rainfall-area length is not observable. At the low wind speed, the corresponding turbulence in terms of the turbulent kinetic energy （TKE） dissipation rate is significantly enhanced by rain- fall as the waves are damped severely. At the high wind speed, the augment of the TKE dissipation rate is suppressed while the wind waves are enhanced simultaneously. In the field, however, rainfall usually hin- ders the development of waves. In order to explain this contradiction of rainfall effect on waves, a possibility about energy transfer from turbulence to waves in case of the spectral peak of waves overlapping the inertial subrange of turbulence is assumed. It can be applied to interpret the damping phenomenon of gas trans- fer velocity in the laboratory experiments, and the variation of the TKE dissipation rates near sea surface compared with the law of wall.

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