Sea‐ice properties off Labrador and Newfoundland during LIMEX ‘89
Sea‐ice properties off Labrador and Newfoundland during LIMEX ‘89
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LIMEX ‘89 期间拉布拉多和纽芬兰附近的海冰特性
DOI：
10.1080/07055900.1992.9649438
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发表时间：
1992
期刊：
影响因子：
1.2
通讯作者：
I. Peterson
中科院分区：
文献类型：
--
作者：
S. Prinsenberg;I. Peterson
摘要 1988/89年寒冷的冬季，纽芬兰陆架冰盖异常高，但拉布拉多陆架北部冰盖却很低。浮冰呈平行于海岸和水深的带状排列，薄冰和开放水域出现在厚浮冰的近岸，这是沿海岸冰分流和陆架断裂处冰融化速率较大的结果。当使用气候平均雪层深度时，冰冻度日模型预测陆地固定冰站的冰厚度高于正常冰厚度。然而，观测到的冰厚度低于正常水平，这只能在使用观测到的雪条件时进行预测。离岸风产生冰散度，刺激近岸地区冰生长增加，进而导致表面混合层深度大和盐度值高。从卫星跟踪的冰信标获得的冰漂流速率的两周平均速度为 18 km d−1 ，等于陆架断裂处冰边缘的大水平融化速率......
Abstract During the cold winter of 1988/89, ice coverage was abnormally high over the Newfoundland Shelf, but was low over the northern Labrador Shelf. The pack‐ice aligned in bands parallel to the coast and bathymetry, with thin ice and open water occurring inshore of the thick pack‐ice, a result of ice divergence along the coast and the large ice‐melt rates at the shelf break. Freezing degree‐day models predicted higher than normal ice thicknesses at land‐fast ice stations when climatic mean snow‐layer depths were used. However, observed ice thicknesses were below normal, which could only be predicted when observed snow conditions were used. Offshore winds generated ice divergence, which stimulated increased ice growth in the nearshore region, which in turn caused the large surface mixed layer depths and high salinity values. Ice drift rates obtained from satellite‐tracked ice beacons had two‐week averaged speeds of 18 km d−1 equal to the large horizontal melt rates of the ice edge over the shelf break ...