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ZHANG Xiaoshuang,WANG Zhifeng,WANG Bin,WU Kejian,HAN Guijun,LI Wei. 2014. A numerical estimation of the impact of Stokes drift on upper ocean temperature. Acta Oceanologica Sinica, 33(7):48-55
A numerical estimation of the impact of Stokes drift on upper ocean temperature
Stokes漂对上层海洋温度变化影响的数值研究
Received:June 26, 2013  Revised:January 17, 2014
DOI:10.1007/s13131-014-0507-5
Key words:sea surface waves  Stokes drift  mixed layer temperature
中文关键词:  海表面波浪,Stokes漂,混合层温度
基金项目:The National Basic Research Program of China under contract No. 2013CB430304;the National High-Tech R&D Program of China under contract No. 2013AA09A505;the National Natural Science Foundation and Science and Technology Support Key Project Plan of China under contract No. 2011BAC03B02;the National Natural Science Foundation of China under contract Nos 41376013, 41376015, 41306006 and 41206178;the open Fundation of the key layboratory of Digital Ocean under contract No. KLDO 201406.
Author NameAffiliationE-mail
ZHANG Xiaoshuang Key Laboratory of Marine Environmental Information Technology, National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171, China  
WANG Zhifeng Ocean University of China, Qingdao 266100, China  
WANG Bin National Ocean Technology Center, State Oceanic Administration, Tianjin 300112, China  
WU Kejian Ocean University of China, Qingdao 266100, China kejianwu@ouc.edu.cn 
HAN Guijun Key Laboratory of Marine Environmental Information Technology, National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171, China  
LI Wei Key Laboratory of Marine Environmental Information Technology, National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171, China  
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Abstract:
      The impact of Stokes drift on the mixed layer temperature variation was estimated by taking into account an advective heat transport term induced by the Stokes drift in the equation of mixed layer temperature and using the oceanic and wave parameters from a global ocean circulation model (HYCOM) and a wave model (Wave Watch Ⅲ). The dimensional analysis and quantitative estimation method were conducted to assess the importance of the effect induced by the Stokes drift and to analyze its spatial distribution and seasonal variation characteristics. Results show that the contribution of the Stokes drift to the mixed layer temperature variation at mid-to-high latitudes is comparable with that of the mean current, and a substantial part of mixed layer temperature change is induced by taking the Stokes drift effect into account. Although the advection heat transport induced by the Stokes drift is not the leading term for the mixed layer temperature equation, it cannot be neglected and even becomes critical in some regions for the simulation of the upperocean temperature.
中文摘要:
      海表面波浪在上层海洋能够诱导产生Stokes漂流,其对上层海洋温度场存在平流热输送贡献,而已有的混合层温度变化方程忽略了Stokes漂流的影响,仅考虑了上层海洋平均流的平流热输送贡献,因此,利用已有的混合层温度变化方程对海洋温度场进行模拟存在一定的缺陷。本文将Stokes漂流所诱导的平流热输送项引入混合层温度变化方程中,利用改进后的混合层温度变化方程分析Stokes漂流对混合层温度变化影响的时空分布特征,以及影响的相对重要性。根据改进后的混合层温度变化方程进行量纲分析,结果表明,在南北半球中高纬度区域浪致平流热输送项的贡献比较显著,能够达到与平均流诱导的平流热输送项和热通量项同等量级。定量计算的结果表明,对于混合层温度变化,Stokes漂流与平均流的贡献具有同等的重要性,并且,引入Stokes漂流诱导的平流热输送项后,整体混合层温度变化率的改变是显著的。虽然浪致平流热输送项并非混合层温度变化方程的主导项,但是其作用是不可忽视的,其对上层海洋温度场的模拟和气候研究具有关键性的影响。因此,在混合层温度变化方程中考虑波浪的影响是必要的。
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