10.6084/m9.figshare.7767803.v2 Jiapeng Qu Jiapeng Qu Fabian Ewald fassnacht Fabian Ewald fassnacht Christopher Schiller Christopher Schiller Teja Kattenborn Teja Kattenborn Xinquan Zhao Xinquan Zhao Landsat sign tau values 1990 2002 Tile 13 Springer Nature 2019 Tibetan Plateau grassland LANDSAT Grassland trends ndvi-difference MODIS Mann-Kendall trend test 2019-05-22 09:09:42 Dataset https://springernature.figshare.com/articles/dataset/Landsat_sign_tau_values_1990_2002_Tile_13/7767803 Landsat sign tau values 1990 2002 Tile 13