Three-in-one: measuring snow depth, surface soil moisture, and frozen ground elevation changes by GPS Interferometric Reflectometry at a site in Northwestern Qinghai-Tibet Plateau

Jiahua Zhang, Chinese University of Hong Kong, Hong Kong, Hong Kong, Tao Che, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China, Lei Su, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Lanzhou, China; University of Chinese Academy of Sciences, Beijing, China and Lin Liu, The Chinese University of Hong Kong, Earth System Science Programme, Hong Kong, Hong Kong