Oceanographic conditions at Ocean Weather Ship Bravo, 1964–1974
Oceanographic conditions at Ocean Weather Ship Bravo, 1964–1974
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海洋气象船 Bravo 的海洋学条件，1964 年至 1974 年
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
J. Lazier
中科院分区：
文献类型：
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作者：
J. Lazier
本文给出了1964 ~ 1974年Bravo号海洋气象船（56° 30 ′ N，51° 00 ′ W）10 ~ 1500米11个深度水温、盐度和密度的月平均异常。1967年至1971年间的近地表盐度值明显低于1964年至1967年间的值。与较低的盐度值相一致，冬季的热损失低于正常水平。增加层结与低热损失相结合，往往限制对流混合上层在冬季异常浅的深度。这表明，低盐度条件是间接由于格陵兰岛上空的一个异常高的气压单体。这个环流增加了格陵兰岛周围的反气旋气流，导致东格陵兰岛和拉布拉多海流以及拉布拉多海内部的低盐度极地水比例增加。
Abstract Monthly averages of water temperature, salinity, and density anomaly at 11 depths between 10 and 1500 m, at Ocean Weather Ship Bravo (56°30'N, 51°00'W), between 1964 and 1974 are presented. Near‐surface salinity values between 1967 and 1971 were significantly lower than those between 1964–1967. Coincident with the lower salinity values, the winter‐time heat losses were less than normal. The combination of increased stratification with the low heat losses tended to limit the convectively mixed upper layer in winter to unusually shallow depths. It is suggested that the low salinity condition was indirectly due to an anomalously high atmospheric pressure cell over Greenland. This cell increased the anticylonic air flow around Greenland causing an increase in the proportion of low‐salinity polar water in the east Greenland and Labrador Currents and subsequently in the interior of the Labrador Sea.