Rise and fall of ice production in the Arctic Ocean's ice factories

Rise and fall of ice production in the Arctic Ocean's ice factories
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北冰洋制冰厂冰产量的上升和下降

DOI:
10.1002/essoar.10508572.1
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发表时间:
2021
期刊:
--
影响因子:
--
通讯作者:
Cornish S
Cornish S
中科院分区:
--
文献类型:
--
作者:
Cornish S

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北极海冰的数量、范围和年龄都在下降,但冬季海冰的产量似乎一直在增加,尽管北极变暖在冬季最为严重。一些负反馈过程有助于在冬季恢复北极海冰体积,尽管先前的研究表明,这些机制将在未来被变暖所淹没,导致冰产量下降。在这里,我们分析冬季冰生产在卡拉和拉普捷夫海有时被称为北极的“冰工厂”,他们的超大作用,供应年轻的海冰北冰洋。使用社区地球系统模型的大包围(CESM-LE),我们开发了一个简单的线性模型,可以解释强迫上升和强迫下降的冰生产,在一致的物理。我们将我们的线性模型应用于基于观测的相同气候变量的估计;我们对冰产量的重建表明,正如CESM-LE一样,我们目前正在通过卡拉海和拉普捷夫海的冰产量峰值。
The volume, extent and age of Arctic sea ice is in decline, yet winter sea ice production appears to have been increasing, despite Arctic warming being most intense during winter months. Several negative feedback processes help to restore Arctic sea ice volume during the winter, though previous work suggests that these mechanisms will be overwhelmed by warming in the future, leading to a fall in ice production. Here, we analyse winter ice production in the Kara and Laptev seas–sometimes referred to as Arctic “ice factories”, for their outsized role in supplying the Arctic Ocean with young sea ice. Using the Community Earth System Model’s Large Ensemble (CESM-LE), we develop a simple linear model that can explain both the forced rise and forced fall of ice production, in terms of consistent physics. We apply our linear model to observation-based estimates of the same climate variables; our reconstruction of ice production suggests that–just as in CESM-LE–we are currently passing the peak of ice production in the Kara and Laptev seas.
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