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首页> 外文期刊>Journal of Physical Oceanography >Sea-Ice Drift on the Northeastern Shelf of Sakhalin Island
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Sea-Ice Drift on the Northeastern Shelf of Sakhalin Island

机译：萨哈林岛东北大陆架上的海冰漂移

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摘要

Ice-drift velocity records from coastal radar stations, combined with data from moored current meters and coastal wind stations, are used to examine sea-ice motion off the northeastern coast of Sakhalin Island in the Sea of Okhotsk. Ice motion is shown to be governed primarily by diurnal tidal currents and wind-induced drift, which explain 92%-95% of the total ice-drift variance. Diurnal tidal motions predominate off the northern Sakhalin coast, accounting for 65%-80% of the variance, while low-frequency wind-induced motions prevail off the south-central coast, accounting for over 91% of the ice-drift variance. Maximum diurnal tidal ice-drift velocities range from 90-110 cm s~(-1) on the north coast to 10-15 cm s~(-1) on the south coast, in good agreement with the barotropic model of Kowalik and Polyakov. The presence of diurnal shelf waves accounts for the strong diurnal currents on the steeply sloping northern Sakhalin shelf, while the absence of such waves explains the weak diurnal currents on the more gently sloping south-central shelf. Using a vector regression model, the authors show that wind-induced ice-drift "response ellipses" (the current velocity response to a unity wind-velocity forcing) are consistent with a predominantly alongshore response to the wind, with wind-induced currents most pronounced off the south-central coast where water depths are relatively shallow. Time-frequency analysis of wind and ice-drift series reveals that, in winter, when sea ice is most extensive and internally cohesive, the ice response is almost entirely aligned with the alongshore component of the wind; in spring, when sea ice is broken and patchy, the ice responds to both the cross- and alongshore components of the wind.
机译：来自沿海雷达站的冰漂移速度记录，与来自系泊电流表和沿海风力站的数据相结合，用于检查鄂霍次克海萨哈林岛东北海岸外的海冰运动。冰运动主要受昼夜潮流和风引起的漂移支配，这解释了总冰漂移量的92％-95％。萨哈林岛北部沿海地区主要以昼夜潮汐运动为主，占变化的65％-80％，而中南部沿海地区以低频风致运动为主，占冰漂移变化的91％以上。日最大潮汐冰漂移速度从北海岸的90-110 cm s〜（-1）到南海岸的10-15 cm s〜（-1），与Kowalik和Polyakov的正压模型非常吻合。日架子波的存在是在萨哈林北部陡峭倾斜的陆架上产生强大的昼夜水流的原因，而没有此类波浪解释了在较缓坡的中南部架子上存在着弱的日流。使用矢量回归模型，作者显示风致冰漂移“响应椭圆”（当前对统一风速强迫的速度响应）与主要沿岸对风的响应一致，其中风致电流最大。在水深相对较浅的中南部海岸附近宣读。对风和冰漂移序列的时频分析显示，在冬季，当海冰最广泛且内部具有粘性时，冰的响应几乎与风的沿岸成分完全一致。在春季，当海冰破裂并出现片状时，冰对风的横向和沿岸分量都做出了响应。

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