High positive correlation between soil temperature and NDVI from 1982 to 2006 in alpine meadow of the Three-River Source Region on the Qinghai-Tibetan Plateau. - Weixin Xu; Song Gu; Xinquan Zhao; Jianshe Xiao; Yanhong Tang; Jingyun Fang; Juan Zhang; Sha Jiang (Int. J. Appl. Earth Obs. Geoinformation, 2011)