Inter-annual Variations in Snow/Firn Density over the Greenland Ice Sheet by Combining GRACE gravimetry and Envisat Altimetry

Xiaoli Su, Huazhong University of Science and Technology, Wuhan, China, C.K. Shum, Ohio State University, School of Earth Sciences, Columbus, OH, United States, Junyi Guo, The Ohio State University, School of Earth Sciences, Columbus, OH, United States, Ian Howat, The Ohio State University, Columbus, United States, Kenneth C Jezek, Byrd Polar and Climate Research Center, The Ohio State University, Columbus, OH, United States, Zhicai Luo, MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan, China and Zebing Zhou, Institute of Geophysics, HUST, Wuhan, China