To study the water dynamics in the western Bering Sea, the time series of geostrophic velocities derived from satellite altimetry, Global total current (Copernicus Globcurrent) velocities, Argo buoys, and ship, borne data are analyzed. We demonstrate that the surface currents in the study area are characterized by a significant seasonal and interannual variability. In January, the southwestern currents are prevailing in the western Bering Sea, the geostrophic currents are connected to the continental slope, and mesoscale anticyclonic movement of waters is observed on the shelf. In July, the surface flow is oriented to the northeast along the continental slope, and cyclonic water movement prevails on the shelf. The formation of mesoscale anticyclones in late winter – early spring – is related to the supply of low-temperature and low-salinity Bering Sea shelf water. The temporal variability of the direction and current velocity in the western part of the Bering Sea during the summer period is associated with the wind and coastal upwelling. The presence of coastal upwelling and eddies should be considered as one of the factors leading to the high concentration of chlorophyll a on a shelf and continental slope in the summer.

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白令海西部的水动力学及其对叶绿素a浓度的影响

为了研究白令海西部的水动力学，分析了来自卫星测高仪的地转速度的时间序列，全球总水流（Copernicus Globcurrent）的速度，Argo浮标以及船载数据。我们证明研究区域的地表电流具有明显的季节和年际变化特征。1月，西南流在白令海西部盛行，地转流与大陆坡相连，并且在架子上观察到水的中尺度反气旋运动。在7月，地表水流沿着大陆坡向东北方向移动，架子上普遍存在旋风水运动。冬末-早春中尺度反气旋的形成与低温和低盐度的白令海陆架水的供应有关。夏季白令海西部方向和流速的时间变化与风和沿海上升有关。沿海上升流和涡流的存在应被认为是导致叶绿素浓度高的因素之一一个夏天的架子和大陆坡。