Heat and Freshwater Transport through the Central Labrador Sea
Heat and Freshwater Transport through the Central Labrador Sea
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通过中央拉布拉多海的热量和淡水输送
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
F. Straneo
中科院分区：
文献类型：
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作者：
F. Straneo
摘要拉布拉多海水（LSW）出口的季节性和年际变化，以及通过拉布拉多海中部的热量和淡水输送，在两个不同的时期进行了研究：从1964年到1974年，使用海洋气象站Bravo数据，从1996年到2000年，使用从剖面浮标收集的数据。一个典型的季节性循环包括300米厚的LSW（对流），其次是一个等效的变薄（restratification）。再分层的特点是向边界电流值，这是一个有力的横向交流的指示属性的漂移。最终结果是200至700米之间的热量和盐的汇聚，平衡了向大气的净表面热量损失，并部分抵消了由于表面横向交换而导致的表面淡水积累。考虑到中央拉布拉多海边界电流密度梯度的变化，这决定了横向交流的年际变化，可以解释出口LSW。联系我们
Abstract The seasonal and interannual variations in the export of Labrador Sea Water (LSW), and in the heat and freshwater transport through the central Labrador Sea, are examined for two different periods: from 1964 to 1974, using Ocean Weather Station Bravo data, and from 1996 to 2000, using data collected from profiling floats. A typical seasonal cycle involves a 300-m thickening of LSW (convection) followed by an equivalent thinning (restratification). Restratification is characterized by a drift of properties toward boundary current values that is indicative of a vigorous lateral exchange. The net result is a convergence of heat and salt, between 200 and 700 m, that balances the net surface heat loss to the atmosphere and partially offsets the surface freshwater accumulation due to surface, lateral exchange. Interannual variations in the export of LSW can be explained by taking into account changes in the central Labrador Sea–boundary current density gradient, which governs the lateral exchange. Inte...