Sea ice, high‐latitude convection, and equable climates
Sea ice, high‐latitude convection, and equable climates
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海冰、高纬度对流和温和的气候
DOI：
10.1029/2007gl032286
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发表时间：
2008
影响因子：
5.2
通讯作者：
E. Tziperman
中科院分区：
文献类型：
--
作者：
D. Abbot;E. Tziperman
有人认为，冬季无冰的高纬度海洋可能会发生深层大气对流，而与冬季对流相关的云和水蒸气的表面辐射变暖效应可能会使高纬度海洋在极夜保持无冰。在这样一个无冰的高纬度海洋中，年平均海温将高得多，季节周期将显着缩短，这对气候平等的潜在影响显而易见。建立了大气热传输、海洋热传输和二氧化碳浓度对该机制的约束。这些想法是使用 NCAR 柱模型进行研究的，该模型具有最先进的大气物理参数化、高垂直分辨率、完整的季节循环、热力学海冰模型和混合层海洋。
It is argued that deep atmospheric convection might occur during winter in ice‐free high‐latitude oceans, and that the surface radiative warming effects of the clouds and water vapor associated with this winter convection could keep high‐latitude oceans ice‐free through polar night. In such an ice‐free high‐latitude ocean the annual‐mean SST would be much higher and the seasonal cycle would be dramatically reduced ‐ making potential implications for equable climates manifest. The constraints that atmospheric heat transport, ocean heat transport, and CO2 concentration place on this mechanism are established. These ideas are investigated using the NCAR column model, which has state‐of‐the‐art atmospheric physics parameterizations, high vertical resolution, a full seasonal cycle, a thermodynamic sea ice model, and a mixed layer ocean.