Continuous winter oceanic profiling in the Cape Darnley Polynya, East Antarctica
Continuous winter oceanic profiling in the Cape Darnley Polynya, East Antarctica
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DOI：
10.1007/s10872-020-00550-w
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发表时间：
2020-05-25
影响因子：
2.3
通讯作者：
Tamura, Takeshi
中科院分区：
文献类型：
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作者：
Aoki, Shigeru;Ono, Kazuya;Tamura, Takeshi
南极沿海的冰穴为全球深渊提供了极其稠密的水，但冬季对稠密水形成过程的监测很差。本研究开发了一种新型的绳系剖面仪，实现了对东南极达恩利角波林亚海区水柱的时间序列观测。该系统成功地获得了2017年3月至11月每隔10天的温度和盐度剖面。从三月到四月，显着的降温和垂直混合开始，同时层结崩溃。盐度从4月到5月下旬迅速增加，然后逐渐增加，直到10月。盐度的发展在很大程度上是一致的累积盐增加，由于海冰的生产在初始阶段，但不是在后期阶段，表明跨大陆架交换的影响。这些结果突出表明，该测量平台有潜力填补全球海洋监测网络的剩余空白。
Antarctic coastal polynyas provide extremely dense water to the global abyss, but the dense water formation process has been poorly monitored in winter. This study developed a new tethered profiler to realize time-series observations of the water column in the Cape Darnley Polynya, East Antarctica. The system successfully obtained temperature and salinity profiles at 10-day intervals from March to November 2017. From March to April, significant cooling and vertical mixing started, while stratification collapsed. Salinity increased rapidly from April to late-May and then gradually increased until October. Salinity development was largely consistent with the cumulative salt increase due to sea-ice production at the initial stage, but not at latter stages, indicating the influence of cross-shelf exchange. These results highlighted the potential of the measurement platform to fill the remaining gap in the global ocean monitoring network.