Variation in the Distribution and Properties of Circumpolar Deep Water in the Eastern Amundsen Sea, on Seasonal Timescales, Using Seal-Borne Tags
Variation in the Distribution and Properties of Circumpolar Deep Water in the Eastern Amundsen Sea, on Seasonal Timescales, Using Seal-Borne Tags
复制标题
使用海豹携带的标签，在季节时间尺度上东阿蒙森海环极深水的分布和特性变化
DOI：
10.1029/2018gl077430
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发表时间：
2018
影响因子：
5.2
通讯作者：
Mallett H
中科院分区：
文献类型：
--
作者：
Mallett H
在阿蒙森海，温暖的咸水绕极深水(CDW)穿过大陆架，走向脆弱的西南极冰架，导致它们的底部融化。由于缺乏观测，人们对CDW的时空变化知之甚少，特别是在季节性方面。2014年2月至12月，由6,704个海豹标签温度和盐度剖面组成的新数据集显示，在冬末(8月至10月)，CDW层平均比夏末(2月至4月)厚49千巴，这与西部海槽停泊时的季节性相反。冬季该层含热较多，但在27.76 kg/m~3密度面上，阿蒙森海东北部夏季CDW比冬季高0.32℃，这可能表明冬季离岸浅海改变了CDW在陆架上的性质。在松岛湾，密度面上的这些季节变化减少了，可能是由于环流。
In the Amundsen Sea, warm saline Circumpolar Deep Water (CDW) crosses the continental shelf toward the vulnerable West Antarctic ice shelves, contributing to their basal melting. Due to lack of observations, little is known about the spatial and temporal variability of CDW, particularly seasonally. A new data set of 6,704 seal tag temperature and salinity profiles in the easternmost trough between February and December 2014 reveals a CDW layer on average 49 dbar thicker in late winter (August to October) than in late summer (February to April), the reverse seasonality of that seen at moorings in the western trough. This layer contains more heat in winter, but on the 27.76 kg/m3density surface CDW is 0.32°C warmer in summer than in winter, across the northeastern Amundsen Sea, which may indicate that wintertime shoaling offshelf changes CDW properties onshelf. In Pine Island Bay these seasonal changes on density surfaces are reduced, likely by gyre circulation.