Global sea level rise dampened by increasing Antarctic snow accumulation during the past three centuries ...

• Main Authors: Wang, Yetang, Zhou, Min, Sun, Yuqi
• Format: Conference Object
• Language: English
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Antarctic; The Antarctic; Antarc*; ice core; Ice Sheet
• Online Access: https://dx.doi.org/10.57757/iugg23-3174; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020590

<!--!introduction!--> Antarctic snow accumulation is a direct regulator of the global sea level changes, but quantification of its long-term evolution at the ice sheet scale is challenging. Here, we combine a most recently complied dataset of ice core records with spatial coherence patterns from five different reanalysis products and two regional climate models, for the first time, to produce a reconciled 310-year reconstruction of spatially and temporally complete snow accumulation over the Antarctic Ice Sheet (AIS). Despite greatly variable signs and magnitudes of reconstructed snow accumulation trends at the different regions, a significant positive trend (3.6±0.8 Gt yr -1 decade -1 ) is observed for snow accumulation over the entire AIS during the past 300 years, with a larger increase rate since 1801. The increased snow accumulation cumulatively dampened global sea-level rise by ~14 mm between 1901 and 2010. The first and second modes of the empirical orthogonal function analysis (EOF1 and EOF2) ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...