微波辐射计SSM/I数据和散射计QuickSCAT数据已广泛应用于冰盖表面冻融探测，但由于探测精度的限制，仅靠SSM/I数据或QuickSCAT数据难以精确获得南极冰盖表面冻融的时空变化特征。为提高南极冰盖表面冻融探测精度，本项目基于SSM/I数据和QuickSCAT数据优势互补的原则，开展（1）基于SSM/I的高可靠性和QuickSCAT的高灵敏度的边缘检测的SSM/I数据（19 GHz）和QuickSCAT数据协同的南极冰盖表面冻融探测方法研究；（2）基于SSM/I的高可靠性和QuickSCAT的高空间分辨率的积雪融化物理模型的SSM/I数据和QuickSCAT数据协同的南极冰盖表面冻融探测方法研究。将这两种协同方法得到的高低空间分辨率冰盖表面冻融结果结合起来将有利于南极冰盖表面冻融的时空变化监测系统的业务化运行，为南极及全球的气候变化研究提供理论依据和数据支撑。

Microwave radiometer SSM/I data and scatterometer QuickSCAT data have been widely used for the ice-sheet near-surface freeze-thaw detection, but because of the limitation of the detection accuracy, it is difficult to accurately obtain the Antarctic ice-sheet near-surface freeze-thaw spatial-temporal change characteristics by SSM/I data or QuickSCAT data. In order to improve the Antarctic ice-sheet near-surface freeze-thaw detection accuracy, the project will utilize the principle of complementary advantages of SSM/I data and QuickSCAT data, and the following studies will be done (1) Study on the method for Antarctic ice-sheet near-surface freeze-thaw detection based on the synergy of SSM/I data (19 GHz) and QuickSCAT data will be done by using the high reliability of SSM/I data and the high sensitivity of QuickSCAT data based on the edge detection. (2) Study on the method for Antarctic ice-sheet near-surface freeze-thaw detection based on the synergy of SSM/I data and QuickSCAT data will be done by using the high reliability of SSM/I data and the high spatial resolution of QuickSCAT data based on the snowmelt physical model. Combining the ice-sheet near-surface freeze-thaw results of the low spatial resolution and the high spatial resolution obtained by the two synergetic method will be beneficial to the business operation for the Antarctic ice-sheet near-surface freeze-thaw spatial-temporal change monitoring system, and it will provide theoretical evidence and data support for the study on Antarctic and global climate changes.