Transiting consolidated ice strongly influenced polynya area during a shrink event in Terra Nova Bay in 2013
Transiting consolidated ice strongly influenced polynya area during a shrink event in Terra Nova Bay in 2013
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DOI：
10.1038/s43247-023-00712-w
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发表时间：
2023-02
影响因子：
7.9
通讯作者：
Yichen Lin;Qinghua Yang;M. Mazloff;Xingren Wu;X. Tian-Kunze;L. Kaleschke;Lejiang Yu;Dake Chen
中科院分区：
文献类型：
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作者：
Yichen Lin;Qinghua Yang;M. Mazloff;Xingren Wu;X. Tian-Kunze;L. Kaleschke;Lejiang Yu;Dake Chen
南极海岸冰穴是海气能量交换的窗口，也是南极底层水的重要来源。然而，冰间湖面积变化与周围海洋环境之间的关系尚未得到充分了解。在这里，我们量化的过境巩固冰的体积与冰厚度数据的Terra Nova湾Polynya地区的影响。在2013年6月19日至7月3日发生的典型冰间湖萎缩事件中，过境固结冰量的变化主导了冰间湖的演变和变化，而不是通常认为是主要驱动因素的下降风或气温。在2013年至2020年的寒冷季节，Terra Nova Bay Polynya地区与过境的合并冰量高度相关。我们证明了厚的过境冰通过阻止新形成的海冰离开来限制冰穴区。
Coastal polynyas in Antarctica are a window of air-sea energy exchange and an important source of Antarctic Bottom Water production. However, the relationship between the polynya area variation and the surrounding marine environment is yet to be fully understood. Here we quantify the influence of the volume of transiting consolidated ice on the Terra Nova Bay Polynya area with ice thickness data. Changes in transiting consolidated ice volume are shown to dominate the evolution and variation of the polynya during a typical polynya shrinking event that occurred between 19 June to 03 July, 2013, rather than katabatic winds or air temperature, which are commonly assumed to be the main drivers. Over the cold seasons from 2013 to 2020, the Terra Nova Bay Polynya area is highly correlated to the transiting consolidated ice volume. We demonstrate that thick transiting ice limits the polynya area by blocking the newly-formed sea ice from leaving.