Local Air‐Sea Interactions at Ocean Mesoscale and Submesoscale in a Western Boundary Current
Local Air‐Sea Interactions at Ocean Mesoscale and Submesoscale in a Western Boundary Current
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DOI：
10.1029/2021gl097003
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发表时间：
2022-03
影响因子：
5.2
通讯作者：
E. Strobach;P. Klein;A. Molod;A. A. Fahad-A.;A. Trayanov;D. Menemenlis;H. Torres
中科院分区：
文献类型：
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作者：
E. Strobach;P. Klein;A. Molod;A. A. Fahad-A.;A. Trayanov;D. Menemenlis;H. Torres
我们展示了新的全球高分辨率（海洋约 3 公里，大气约 6 公里）现实地球系统模拟的结果。这种模拟使我们能够检查小规模海气相互作用的各个方面，超出了以前的研究报告。我们的研究重点是墨西哥湾流地区反复出现的间歇性风事件。这些事件会导致水平尺度小于 500 公里的海面温度 (SST) 异常之上的局部海气热通量。特别是，在这些风事件期间，观察到在温暖的海表温度异常上方出现强烈的潜热爆发。我们表明，此类风事件与二次环流有关，二次环流通过将干燥空气和动量传递到地表来为潜热爆发提供燃料。这种次级环流的强度与与海温异常接壤的小规模海温锋的强度有关。对此类现象的研究需要模型的大气和海洋部分具有高分辨率。
We present results from a new, global, high‐resolution (∼3‐km for ocean and ∼6‐km for atmosphere) realistic earth system simulation. This simulation allows us to examine aspects of small‐scale air‐sea interaction beyond what previous studies have reported. Our study focuses on recurring intermittent wind events in the Gulf Stream region. These events induce local air‐sea heat fluxes above Sea Surface Temperature (SST) anomalies with horizontal scales smaller than 500‐km. In particular, strong latent heat bursts above warm SST anomalies are observed during these wind events. We show that such wind events are associated with a secondary circulation that acts to fuel the latent heat bursts by transferring dry air and momentum down to the surface. The intensity of this secondary circulation is related to the strength of small‐scale SST fronts that border SST anomalies. The study of such phenomena requires high‐resolution in both the atmospheric and oceanic components of the model.