Abstract—

High-resolution measurements by unmanned aerial vehicles (UAVs), satellite and in-situ data are used to study the optical structure of coastal submesoscale eddies and their influence on the transport of total suspended matter (TSM). It is shown that submesoscale cyclones cause intense cross-shelf TSM fluxes and its subsequent accumulation in their cores, similar to what is observed in large mesoscale anticyclones. UAV measurements make it possible to observe intensive dynamic processes on the periphery of eddies, seen as a periodic structure with scales of 20–100 m; the spiral structure of TSM transport; and convergence of TSM in the cores of cyclones. Using UAV guidance, detailed measurements of the distribution of hydrological and hydro-optical characteristics of one of these eddies, with a diameter of about 2 km, were obtained during a scientific cruise in October 2019. Warm brackish water with a high TSM content and the descent of all isosurfaces were observed in the core of this cyclone, located near the topographic slope. We suggest that the probable reason for the convergence in such submesoscale cyclones is the interaction of radial currents with the topographic slope, which causes downwelling in the coastal part of eddies.

中文翻译：

---

基于无人机，卫星和原位测量数据的亚中尺度涡旋对克里米亚沿海地区悬浮物运输的影响

摘要—

通过无人飞行器（UAV）的高分辨率测量，卫星和现场数据来研究沿海亚中尺度涡旋的光学结构及其对总悬浮物（TSM）传输的影响。结果表明，亚中尺度旋风导致强烈的跨架TSM通量及其随后在其核心中的积聚，这与在大型中尺度反旋风中观察到的相似。无人飞行器的测量使在涡流周围观察到密集的动态过程成为可能，这种动态过程被视为规模为20–100 m的周期性结构。TSM运输的螺旋结构；和TSM在气旋核心中的融合。利用无人机的指导，详细测量了其中一个直径约2 km的涡流的水文和水光学特征的分布，是在2019年10月的一次科学巡航中获得的。在这个旋风分离器的核心（位于地形坡度附近）中，观察到高TSM含量的微咸水和所有等值面的下降。我们认为，在这种亚中尺度气旋中收敛的可能原因是径向流与地形坡度的相互作用，这会引起涡流沿岸的下沉。