Ice column thickness-change-rate estimates in meters per year based on data from NASA's ICESat and ICESat-2 satellites. === Original Data Source === Ice-sheet height and thickness changes from ICESat to ICESat-2 These data represent ice-column thickness-change-rate estimates based on data from NASA's ICESat and ICESat-2 satellites. These data aided the first estimates of ice-sheet mass change from these two missions, spanning the 16 years from 2003 to 2019, taking advantage of the high vertical and horizontal resolution of the two satellites' laser altimeters. Citation: Smith, Ben; Fricker, Helen; Gardner, Alex; Medley, Brooke; Nilsson, Johan; Paolo, Fernando; Holschuh, Nicholas; Adusumilli, Susheel; Brunt, Kelly; Csatho, Bea; Harbeck, Kaitlin; Markus, Thorsten; Neumann, Thomas; Siegfried, Matthew; Zwally, H. Jay; NASA grant numbers: NNX15AE15G, NNX15AC80G, NNX16AM01G, NNX17AI03G. NASA Cryospheric Sciences and MEaSUREs programs. http://hdl.handle.net/1773/45388. 2020. Citation URL: http://hdl.handle.net/1773/45388