Abstract：Antarctic ice-sheet freeze-thaw variation was monitored based on improved wavelet transform and microwave radiometer SMMR and SSM/I data (1978~2013), and Antarctic 34-year ice-sheet freeze-thaw spatio-temporal variety characteristics was analyzed. Melt spatial distribution showed that the majority of melt areas were located on the edge of Antarctic ice shelves. They were affected by land cover type, altitude and geographic location. The melt temporal distribution showed that the Antarctic melt-area annual variation had regularity. The surface melt area was the largest for 1518750 km2 in 1991. The surface melt area was the smallest for 565000 km2 in 1999. In addition, Antarctic ice-sheet melt varied with seasonal changes, and the snowmelt generally concentrated in November, December, January and February, and there was the largest melt extent in January.
