Reconstructing continuous ice sheet elevation changes in the Amundsen Sea Sector during 2003-2021 by merging multi-altimeter observations ...

• Main Authors: Yue, Lianzhe, Chao, Nengfang, Chen, Gang
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Amundsen Sea; Pope Glacier; West Antarctica; Antarc*; Antarctica; Ice Sheet; Pine Island
• Online Access: https://dx.doi.org/10.57757/iugg23-1163; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017434

<!--!introduction!--> The Amundsen Sea (AS) sector in West Antarctica accounts for a significant proportion of Earth’s ice losses and is the largest contributor of Antarctica’s mass loss. To evaluate its contribution to global sea-level rise, we reconstruct the long-term continuous surface elevation changes (CSEC) record of the AS sector by using an improved least-squares plane fitting method (ILSPFM) to merge altimeter data from Envisat, ICESat, CryoSat-2, and ICESat-2 missions during 2003-2021. The accuracy of CSEC is improved by 25.9% using ILSPFM. The average rate of CSEC in the AS sector was -24.25 ± 0.48 cm yr -1 during 2003 to 2021. The largest signals of SEC are found over Pine Island, Thwaites, and Pope Glaciers, with the largest decline of SEC over Pope Glacier with a total SEC of -82.44 ± 7.21 m and an annual change rate of -4.34 ± 0.38 m yr -1 . The ridge between Pine Island and Thwaites Glaciers is found in the AS sector, indicating that the change of ice sheet is dynamic thinning and ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...