The sensitivity of a thermodynamic sea ice model to changes in surface albedo parameterization
The sensitivity of a thermodynamic sea ice model to changes in surface albedo parameterization
复制标题
热力学海冰模型对表面反照率参数化变化的敏感性
DOI：
10.1029/jd090id01p02243
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发表时间：
1985
影响因子：
--
通讯作者：
A. Henderson‐sellers
中科院分区：
文献类型：
--
作者：
K. Shine;A. Henderson‐sellers
研究了一个海冰热力学模式对北极地区地表能量通量变化的敏感性。本文的主要重点是测试的模式的敏感性，在表面的非线性参数化的变化。在北极地区的湍流和长波通量的气候学是稀缺的，那些存在的被证明会产生显着的差异，在预测的冰厚。有相当大的分歧，在文献上的dropdos值，特别是，建议dropdos的裸露，水坑冰范围从0.4到0.66。已发表的模型模拟之间的差异被证明是潜在的解释，在裸冰的范围内。提出了一种新的冰温参数化方法，并对其敏感性进行了检验。结果表明，增加表面的冰与云层覆盖可能会导致加倍的冰厚度，并证明需要包括融化的雪作为一个冰类不同的干雪。裸冰的冰量的值被证明是重要的，在确定冰是在多年或季节性冰区，并强调需要更多的观测数据的范围和作用的融化水坑。
The sensitivity of a thermodynamic sea ice model to changes in surface energy fluxes in the Arctic is investigated. The main emphasis of the paper is on the testing of the model sensitivity to changes in surface albedo parameterization. Climatologies of turbulent and long-wave fluxes in the Arctic are scarce, and those that exist are shown to generate significant differences in the predicted ice thickness. There is considerable disagreement in the literature on albedo values, and in particular, proposed albedos of bare, puddled ice range from 0.4 to 0.66. The differences among published model simulations are shown to be potentially explicable in terms of this range in bare ice albedo. A new ice albedo parameterization is proposed, and its sensitivity is tested. It is shown that the increase in surface albedo with cloud cover can cause a doubling of the ice thickness, and the need to include melting snow as an albedo class distinct from dry snow is demonstrated. The value of bare-ice albedo is shown to be important in determining whether the ice is in a multiyear or a seasonal ice zone, and the need for more observational data on the extent and role of melt puddles is emphasized.