An Unprecedented Record Low Antarctic Sea-ice Extent during Austral Summer 2022
An Unprecedented Record Low Antarctic Sea-ice Extent during Austral Summer 2022
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DOI：
10.1007/s00376-022-2087-1
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发表时间：
2022-04
影响因子：
5.8
通讯作者：
Jinfei Wang;Hao Luo;Qinghua Yang;Jiping Liu;Lejiang Yu;Q. Shi;Bo Han
中科院分区：
文献类型：
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作者：
Jinfei Wang;Hao Luo;Qinghua Yang;Jiping Liu;Lejiang Yu;Q. Shi;Bo Han
2022年南极季节性最小海冰范围（SIE）于2月25日创下自1978年有记录以来的新低，为190万平方公里，比2017年创下的历史低点低17万平方公里。别林斯高晋/阿蒙森海、威德尔海和西印度洋区域的显着负异常导致了新的历史最低记录。这里提出的海冰预算分析表明，热力学过程通过增强向极地的热传输和反照率温度反馈来主导夏季海冰损失。在春季，动力和热力学过程都会导致海冰负异常。具体而言，海冰厚度（SIT）变化证明了阿蒙森海的动态冰损失占主导地位，而正表面热通量对威德尔海的海冰融化贡献最大。
Seasonal minimum Antarctic sea ice extent (SIE) in 2022 hit a new record low since recordkeeping began in 1978 of 1.9 million km2on 25 February, 0.17 million km2lower than the previous record low set in 2017. Significant negative anomalies in the Bellingshausen/Amundsen Seas, the Weddell Sea, and the western Indian Ocean sector led to the new record minimum. The sea ice budget analysis presented here shows that thermodynamic processes dominate sea ice loss in summer through enhanced poleward heat transport and albedo-temperature feedback. In spring, both dynamic and thermodynamic processes contribute to negative sea ice anomalies. Specifically, dynamic ice loss dominates in the Amundsen Sea as evidenced by sea ice thickness (SIT) change, while positive surface heat fluxes contribute most to sea ice melt in the Weddell Sea.