| 基于Icepack海冰柱模式的融池反照率模拟研究 |
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| 引用本文： | 曹淑涛,苏洁,李涛,钟文理,王晓宇,牟龙江.基于Icepack海冰柱模式的融池反照率模拟研究[J].海洋学报,2021,43(7):63-74. |
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| 作者姓名： | 曹淑涛 苏洁 李涛 钟文理 王晓宇 牟龙江 |
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| 作者单位： | 1.中国海洋大学 海洋与大气学院，山东 青岛 266100 |
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| 基金项目： | 国家重点研发计划项目(2018YFA0605901)；国家自然科学重点基金(41941012)；国家自然科学基金面上基金(42076228) |
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| 摘 要： | 基于Icepack一维海冰柱模式，以2014年中国第6次北极科学考察长期冰站ICE06的3个融池的辐射参量和气象参量的连续观测作为大气强迫数据，对融池反照率及相关参量进行了模拟。本文引入观测的融池深度及海冰厚度作为初始条件，通过考虑融池覆盖率的作用，改进了平整冰融池参数化方案中海冰干舷的计算，修正了冰上可允许的最大融池深度，成功实现了对融池参数变化的模拟；同时，还修正了入射辐射分量比例系数与对应反照率分量权重系数不一致的问题。标准试验中，模拟的3个融池的反照率与观测结果之间的平均误差分别为0.01、0.05和0.13；入射辐射比例的敏感性试验结果表明，当可见光辐射比例增大8%时，融池反照率的模拟结果增大了6%～8%；融池表面再冻结试验的结果显示，当再冻结冰层厚度小于2 cm时，模拟冰面反照率的增加不足0.006，由此引起的表面能量收支减少了约1.1 W/m2。本文研究指出，准确的入射辐射比例对于改善北极海冰反照率模拟是必要的；并指出目前模式仍存在融池表面再冻结参数化、热收支计算、表面吹雪效应等有待解决的问题。
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| 关 键 词： | 融池 反照率 融池深度 Icepack海冰模式 模拟 |
| 收稿时间： | 2021-04-11 |
Study on melt pond albedo based on Icepack sea ice column model |
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| Institution: | 1.College of Oceanic and Atmospheric Science, Ocean University of China, Qingdao 266100, China2.University Corporation for Polar Research, Beijing 100875, China3.Key Laboratory of Physical Oceanography, Ocean University of China, Qingdao 266100, China4.National Laboratory Development Center for Marine Science and Technology, Qingdao 266100, China |
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| Abstract: | Based on one-dimensional sea ice column model Icepack, albedo and depth of melt pond were simulated. Atmospheric forcing data were collected from ICE06, a long-term ice station established during the Sixth Chinese National Arctic Research Expedition in 2014 in which the radiation and meteorological parameters of three melt ponds were continuously observed. In this paper, observed melt pond depth and thickness of sea ice under ponds were used as initial conditions. Furthermore, the calculation of sea ice freeboard in the melt pond scheme of level ice was improved by considering the effect of melt pond fraction. Consequently, by improving the formula of the maximum depth of melt pond above sea ice, simulation of melt pond albedo as well as other related parameters were successfully realized. Additionally, the inconsistency between the proportion coefficient of the incident solar radiation component and the weight coefficient of the corresponding albedo component was modified. The average errors between the simulated and observed albedo of the three ponds in the standard experiments were 0.01, 0.05 and 0.13, respectively. The sensitivity experiment results for the incident radiation proportion suggested that when the proportion of visible radiation increased by 8%, the simulation results of the melt pond albedo increased by 6%?8%. Results of the melt pond refreezing experiments suggested that when the thickness of lid ice is less than 0.02 m, the increase of simulated ice albedo is less than 0.006, resulting in a decrease of surface energy budget by about 1.1 W/m2. It is pointed out that providing an accurate proportion of incident radiation is necessary to improve the simulation of Arctic sea ice albedo. Furthermore, there are still some physical processes which need to be improved in Icepack/CICE model such as melt pond surface refreezing schemes, surface heat budget calculation, surface snow blowing effect and so on. |
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