Global Estimation and Assessment of Monthly Lake/Reservoir Water Level Changes Using ICESat-2 ATL13 Products

Accurate and detailed information on lake/reservoir water levels temporal changes around the globe is urgently required for resource management related studies. The traditional satellite radar altimeters normally monitor level of large lakes reservoirs (i.e., greater than 1 km2) world. Fortunately, recent Ice, Cloud, land Elevation Satellite-2 (ICESat-2) makes it possible to some small less km2). ICESat-2 ATL13 products provide observations inland surface heights, which are suitable estimation at a global scale. In this study, were used conduct assessment changes. We produced monthly 13,843 with areas 0.1 km2 all-season across globe, in 2257 targets smaller km2. total, average valid number months covered by 5.41 only 204 have all 2019. situ data from 21 gauge stations United States 12 Australia collected assess levels, exhibited high accuracy (RMSE = 0.08 m, r 0.999). According comparisons between ATL08 another study we found that both can accurately estimate reservoirs, but derived higher compared 0.28 general, product more convenient because HydroLAKES mask bodies, orthometric height (with respect EGM2008 geoid) surfaces, several quality parameters specific surfaces involved product.