本项目紧紧围绕南极冰盖物质平衡与过去全球变化研究领域的热点问题。利用高分辨率冰芯、雪坑样品分析结果、物质平衡花杆测量及自动气象站观测等积累率资料，结合Twentieth Century Reanalysis （20世纪再分析）资料和欧洲中尺度天气预报中心（ECMWF）ERA-interim再分析资料，在定量评估主成分分析、典型相关分析和类克里格（以格点资料为协同变量）、气候模式输出结果校准等典型古气候场重建方法优劣基础上，选用最优方法，首次高分辨率重建1870年以来的南极冰盖表面物质积累率时空格局，并探讨其演变规律。研究结果将为详细研究气候变化及驱动机制、验证和改进气候模式、卫星遥感冰盖测高结果解释及未来海平面变化预估提供基础数据。

Antarctic mass balance and past global changes have been a major concern of studies. Antarctic surface snow accumulation rate since 1870 will be reconstructed based on snow accumulation rate derived from snow pit, ice core, stake measurement and automatic weather station records and merged Twentieth Century Reanalysis (20CR) and European Centre for Medium-Range Weather Forecasts (ECMWF) ERA-interim Reanalysis. This reconstruction will employ the best method through a comparison of canonical correlation analysis, principal component regression and kriging-like technique techniques，calibrated climate model output and so on. Spatial and temporal variability in Antarctic snow accumulation rate will be also investigated. Our reconstructed snow accumulation rate record will be of use and interest in detail climate change studies, global sea level variation analyses and validation of atmospheric climate models as well as to help interpret radar and LIDAR surface-elevation surveys of the ice sheet.