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首页> 外文期刊>The Global Atmosphere and Ocean System >IMPLEMENTATION OF A COUPLED ATMOSPHERE-WAVE-OCEAN MODEL IN THE MEDITERRANEAN SEA: SENSITIVITY OF THE SHORT TIME SCALE EVOLUTION TO THE AIR-SEA COUPLING MECHANISMS
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IMPLEMENTATION OF A COUPLED ATMOSPHERE-WAVE-OCEAN MODEL IN THE MEDITERRANEAN SEA: SENSITIVITY OF THE SHORT TIME SCALE EVOLUTION TO THE AIR-SEA COUPLING MECHANISMS

机译：地中海海中大气-海洋耦合模型的实现：短期尺度演化对海-海耦合机制的敏感性

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In this study a coupled regional atmosphere-wave-ocean model has been implemented in the Mediterranean Sea and applied to the simulation of the atmospheric circulation and of the upper ocean structure on the short time scale range typical of regional meteorological predictions. The coupling accounts for the feedback of the upper ocean on the atmospheric circulation, that is for the variation of the SST (Sea Surface Temperature) during the development of the cyclones and for the dependence of the SSR (Sea Surface Roughness) on the wind-wave spectrum. The model can operate also in uncoupled mode, with prescribed SST and SSR computed using the Charnock formula (depending on wind speed only). Six case-studies, characterized by strong cyclones and intense air-sea interaction, have been analyzed. A sensitivity analysis is carried out by comparing uncoupled and coupled simulations, carried out including the SST and SSR-feedbacks both separately and simultaneously. The feedbacks have systematic effects on the atmospheric precipitation, on heat and momentum fluxes, and, consequently, on MLD (Mixed Layer Depth), SST, and SWH (Significant Wave Height). For all these quantities, except for SWH, the two feedbacks act in opposite directions. The effect of the SST feedback is larger on latent heat flux, precipitation, sea surface cooling, and, marginally, on mixed layer growth and it determines their reduction when the two feedbacks act simultaneously. The SSR and SST-feedbacks have comparable effect on the SWH field and they both contribute to the SWH reduction. Though the SLP (Sea Level Pressure) and Geopotential minima of single "fall" case-studies can be appreciably modified by the inclusion of the feedbacks, no systematic effect has been identified in these fields, presumably because of the intrinsic unpredictability of the atmospheric circulation.
机译：在这项研究中，已在地中海地区实施了一个耦合的区域海浪-海洋模型，并将其用于模拟区域气象预报的短时标范围内的大气环流和上层海洋结构。这种耦合解释了上层海洋对大气环流的反馈，即旋风形成过程中SST（海表温度）的变化以及SSR（海面粗糙度）对风的依赖性。波谱。该模型还可以在非耦合模式下运行，并使用Charnock公式（仅取决于风速）计算指定的SST和SSR。对六个案例研究进行了分析，这些案例的特点是强旋风和强烈的海-气相互作用。通过比较非耦合和耦合仿真来进行灵敏度分析，仿真分别包括同时进行的SST和SSR反馈。反馈对大气降水，热量和动量通量有系统的影响，因此对MLD（混合层深度），SST和SWH（有效波高）也有影响。对于所有这些数量，除了SWH，两个反馈的作用方向相反。 SST反馈对潜热通量，降水，海面冷却以及混合层生长的影响更大，并且当两个反馈同时起作用时，它决定了它们的减少。 SSR和SST反馈对SWH场的影响相当，它们都有助于减少SWH。尽管可以通过包含反馈明显地修改单个“下降”案例研究的SLP（海平面压力）和地势极小值，但是在这些领域中尚未发现系统性的影响，大概是因为大气环流的内在不可预测性。

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