北极偶极子型大气环流对北极海冰影响的数值模拟研究
Numerical Simulation of the Effects of Arctic Dipole Atmospheric Circulation on Arctic Sea Ice
DOI: 10.12677/CCRL.2019.84055, PDF,  被引量    国家科技经费支持
作者: 王 松*, 苏 洁：中国海洋大学，物理海洋教育部重点实验室，山东 青岛
关键词: 北极海冰；北极偶极子型大气环流；CICE模式；Arctic Sea Ice； Arctic Dipole Atmospheric Circulation； CICE Mode
摘要: 利用美国冰雪数据中心提供的海冰范围和由ERA-Interim提供的月均海平面气压提取的北极偶极子型大气环流(AD)指数分析得出，12~2月的AD平均指数与2月北极海冰范围正相关，5~8月的平均AD指数与9月北极海冰范围负相关。为了区分冬季/夏季AD型大气环流影响下热力、动力强迫对海冰密集度的影响，本文利用CICE海冰模式进行了一系列数值模拟试验。研究表明，模式能够再现正/负位相的AD型大气环流下海冰密集度分布的主要特点，对北极海冰的模拟能力满足研究需求。冬季，北极海冰密集度对AD型风场的变化不敏感，负位相的AD型大气环流通过热力作用或风驱动以外的强迫作用造成大西洋扇区边缘海海冰密集度减小；夏季，正位相的AD型大气环流影响下，东格陵兰海之外的海区海冰密集度减小，这种影响主要来自于风场强迫，风场以外的强迫作用对大西洋扇区边缘海和巴伦支海海冰密集度偏小也有重要贡献。
Abstract: Based on the trend analysis and correlation analysis of sea ice concentration provided by the National Snow and Ice Data Center and AD index extracted from the ERA-Interim sea-level pressure and monthly mean sea level pressure data, it is concluded that the average AD index from December to February is positively correlated with the range of Arctic sea ice in February, and the average AD index from May to August is negatively correlated with the range of Arctic sea ice in September. In order to confirm the influence of thermal and dynamic forcing on sea ice concentration under the influence of AD atmospheric circulation in winter and summer, series of simulation experiment were carried out using CICE sea ice model. The study shows that the model can reproduce the main characteristics of sea ice distribution under positive and negative AD phases, and the simulation ability of arctic sea ice meets the research needs. In winter, the Arctic sea ice concentration is not sensitive to the change of AD type wind field. Under the forcing of negative phase AD, the sea ice concentration in the marginal sea of the Atlantic sector decreases through thermal effector forcing beyond wind drive. In summer, under the influence of positive phase AD, sea ice concentration in the sea area outside east Greenland decreases, which is mainly caused by the dynamic action of wind field, thermodynamic effects also contributed to the smaller of sea ice concentration in the marginal and Barents Seas of the Atlantic sector.
文章引用：王松, 苏洁. 北极偶极子型大气环流对北极海冰影响的数值模拟研究[J]. 气候变化研究快报, 2019, 8(4): 503-515. https://doi.org/10.12677/CCRL.2019.84055

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