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根据南极大陆冰盖近表层的物理模型设计了一个垂直一维的冰盖近表层能量传输模式,采取合理简化的物理过程参数化方案并构造一套完整的数值求解方法,实现了对冰盖表面及近表层内能量传输过程的数值模拟.利用最新获取的东南极高原Dome A自动站的气象观测资料,通过计算冰盖表面能量通量作为模式上边界条件驱动模式求解冰盖表面及近表层内温度的季节变化过程,将模式模拟结果与4个观测深度(0.1,1,3和10m)的雪冰层温度进行了对比检验,取得了与观测较为一致的季节变化过程,并能够揭示出比观测更为细致的冰盖近表层内温度垂直分布结构及其季节变化特征.通过模式结果分析得到的冰盖表面能量平衡特征表明:1)冰盖表面能量平衡全年主要表现为负的净辐射与正的感热通量之间的平衡,季节差异显著;2)冰气相互作用机制主要是大气以感热形式输送给冰盖,并在春季显著增强.因Dome A特殊的地理位置,研究结果对南极高原内陆中心地区具有较好的代表意义.
According to the physical model of Antarctic ice sheet near surface, a vertical one-dimensional ice sheet near-surface energy transfer mode is designed, a rational and simplified physical process parameterization scheme is constructed and a complete numerical solution method is constructed, And the numerical simulation of near surface energy transfer process.Using the meteorological observation data of newly acquired dome A at East Antarctica, the surface energy flux of ice sheet is calculated as the mode upper boundary condition driving mode to solve the ice sheet surface and near surface The seasonal variation of temperature, the model simulation results and four observed depth (0.1, 1, 3 and 10m) of the snow ice layer temperature were compared with the observed and achieved a more consistent with the seasonal changes in the process and can reveal the ratio Observing the more detailed structure of the vertical distribution of temperature near the ice sheet and its seasonal variation, the energy balance characteristics of the ice sheet surface obtained by the analysis of the model results show that: 1) The energy balance of the ice sheet surface mainly shows negative net radiation And the positive sense of heat flux, the seasonal difference is significant; 2) ice-ice interaction mechanism is mainly the atmosphere in the form of heat transfer to the ice sheet , And significantly increased in spring.Because of the special geographical location of Dome A, the results of the study have a good representative meaning for the inland central Antarctic Plateau.