Landsat based peak NDVI image Year 1992 Tile 7 Jiapeng Qu Fabian Ewald fassnacht Christopher Schiller Teja Kattenborn Xinquan Zhao 10.6084/m9.figshare.7737542 https://springernature.figshare.com/articles/dataset/Landsat_based_peak_NDVI_image_Year_1992_Tile_7/7737542 Landsat based peak NDVI image Year 1992 Tile 7 2019-05-20 10:36:16 Tibetan Plateau grassland LANDSAT Grassland trends ndvi-difference MODIS Mann-Kendall trend test