Numerical high‐resolution air‐sea coupling over the Gulf of Lions during two tramontane/mistral events
Numerical high‐resolution air‐sea coupling over the Gulf of Lions during two tramontane/mistral events
复制标题
两次特拉山/米斯特拉尔事件期间狮子湾上空的数值高分辨率海气耦合
DOI：
10.1029/2008jd011601
复制
发表时间：
2009
影响因子：
--
通讯作者：
P. Drobinski
中科院分区：
文献类型：
--
作者：
C. L. Brossier;P. Drobinski
[1] 与地中海强风事件相关的近海表面气象条件对海洋混合层构成了强大的强迫。本研究解决了高分辨率和短程大气数值模拟中使用的海面方案问题，以表示狮子湾地区这些严重密斯塔拉风事件下的海洋混合层响应。几个板片海洋模型已与天气研究和预报 (WRF) 模型结合使用，并应用于两种密斯塔拉尔情况：(1) 基于输运散度方程的板片模型，其中混合层演化仅由风应力驱动；(2) 板片模型，其中温度是唯一的预测变量并根据净表面热通量演化；(3) Price (1981) 的完整板片方案。耦合模拟还与两个基本模拟进行了比较，一个在所有模型集成过程中使用恒定的海面温度 (SST) 场，另一个使用每 6 小时更新一次的海面温度再分析。在本研究中，我们主要关注板模型的性能。我们确定了强风情况下海洋混合层响应所涉及的过程，即局部快速冷却和加深。还研究了交互式海洋混合层对大气模拟的反馈。
[1] The near-sea-surface meteorological conditions associated with strong wind events over the Mediterranean Sea constitute a strong forcing on the ocean mixed layer. The present study addresses the question of the sea surface scheme used in high-resolution and short-range atmospheric numerical modeling to represent the ocean mixed layer response under these severe mistral wind events in the Gulf of Lions area. Several slab ocean models have been used coupled with the Weather Research and Forecasting (WRF) model and applied on two mistral cases: (1) a slab model based on the transport divergence equation where the mixed layer evolution is only driven by the wind stress, (2) a slab model where the temperature is the only prognostic variable and evolves according to the net surface heat flux, and (3) a complete slab scheme from Price (1981). The coupled simulations are also compared to two basic simulations, one using a constant sea surface temperature (SST) field during all of the model integration and another using a 6-hourly update sea surface temperature reanalysis. In this study, we mainly focus on the slab model performances. We identify the processes involved in the ocean mixed layer response under strong wind situations, i.e., local and fast cooling and deepening. The feedbacks of an interactive ocean mixed layer on the atmospheric simulation are also investigated.