Impacts of wave-induced ocean surface turbulent kinetic energy flux on typhoon characteristics
Impacts of wave-induced ocean surface turbulent kinetic energy flux on typhoon characteristics
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DOI：
10.1080/21664250.2021.2017191
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发表时间：
2022-01
影响因子：
2.4
通讯作者：
M. Takagi;J. Ninomiya;N. Mori;T. Shimura;T. Miyashita
中科院分区：
文献类型：
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作者：
M. Takagi;J. Ninomiya;N. Mori;T. Shimura;T. Miyashita
摘要利用实测资料重新讨论了波浪破碎引起的海面湍动能通量的参数化问题。结果表明，波浪能作为海面TKE通量进入海洋的比例取决于风向和波向之间的相对角度。相反的风条件下的分数往往比以下风条件下更大。基于观测结果，提出了一种新的TKE通量参数化方法。将TKE通量参数化方法应用到海气耦合模式中。利用该模式进行的台风后报试验表明，TKE通量对海面弱混合、混合层底部强混合和近惯性内波的影响取决于混合层深度（MLD）。在耦合的大气-海洋-波浪模式中，这些混合差异的影响也反馈到大气侧;取决于TKE通量参数化的台风中心气压的最大差异为10 hPa。本研究之结果显示在台风模拟中，考虑海面TKE通量中波浪的重要性。
ABSTRACT The parameterization of the sea surface turbulent kinetic energy (TKE) flux due to wave breaking was revisited using the observed data. It is found that the fraction of wave energy taken up into the ocean as sea surface TKE flux depends on the relative angle between wind and wave direction. The fraction tends to be larger under opposite wind conditions than following wind conditions. Based on the observed results, a new parameterization of TKE flux was proposed. The TKE flux parameterization was implemented into the atmosphere-ocean-wave coupled model. The experiments on typhoon hindcast using the model showed that TKE flux affects weak mixing at the ocean surface, strong mixing at the bottom of the mixed layer, and near-inertial internal waves depending on the thickness of the mixed layer depth (MLD). In the coupled atmosphere-ocean-wave model, the effects of these mixing differences are also fed back to the atmospheric side; the maximum difference in the central pressure of the typhoon depending on TKE flux parameterization is 10 hPa. The results of this study suggest the importance of considering waves in the sea surface TKE flux for typhoon simulations.