Elevation changes of the Greenland Ice Sheet observed by CryoSat-2 and ICESat-2 ...

• Main Authors: Ravinder, Nitin, Otosaka, Inès, Slater, Thomas, Shepherd, Andrew
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Greenland; Ice Sheet
• Online Access: https://dx.doi.org/10.57757/iugg23-1580; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018026

<!--!introduction!--> Radar and laser satellite altimeters have been routinely monitoring the changes in surface elevation of the Greenland Ice Sheet since the early 1990s and 2000s, respectively. Radar and laser signals interact with the surface and sub-surface of the Greenland Ice Sheet in different ways depending on their wavelength and scattering properties of the illuminated firnpack, which vary both spatially and temporally. Here, we compare elevation changes observed by CryoSat-2’s radar and ICESat-2’s laser altimeters across the entire Greenland Ice Sheet between October 2018 and March 2022 to understand their similarities and differences. Averaged over the whole ice sheet, observed elevation changes from both CryoSat-2 and ICESat-2 altimeters agree very closely, with thinning rates of 15.3 ± 0.7 cm/yr and 12.7 ± 0.9 cm/yr, respectively. We perform an epoch to epoch comparison on the monthly elevation changes observed by both CryoSat-2 and ICESat-2 and find an average difference of -7.2 cm and ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...