Submesoscale coherent vortices (SCVs) are numerous in high‐resolution numerical simulations, but their observations are scarce. Among the few in situ available measurements of SCVs, a vast majority concern anticyclones. No cyclonic SCV with large dynamical Rossby number (|ζ /f | > 1) has ever been sampled. This suggested that such small cyclones may lack robustness. Here, we present in situ measurements of an intense cyclonic SCV in the Arabian Sea. This eddy lay at 600 m depth, with a Rossby number and a dynamical Rossby number |ζ /f | > 1.5. This cyclone was most likely generated at the mouth of the Gulf of Aden. It trapped and advected Red Sea Water, from there on. This highlights the role of deep SCVs in the spreading of salty waters across the Arabian Sea.

中文翻译：

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阿拉伯海深亚中尺度气旋涡的观测

在高分辨率数值模拟中，亚中尺度相干涡（SCV）众多，但它们的观测很少。在SCV的少数几个可用的现场测量中，绝大多数涉及反气旋。从未采样到具有大动态Rossby数（| ζ / f |> 1）的气旋SCV 。这表明这种小型旋风分离器可能缺乏鲁棒性。在这里，我们介绍了阿拉伯海强烈旋风SCV的原位测量。该涡流位于600 m深度，具有Rossby数和动态Rossby数| ζ / f | > 1.5。这种气旋很可能是在亚丁湾口产生的。从那里开始，它困住并推平了红海水。这突出了深层SCV在咸水在阿拉伯海中扩散中的作用。