The Multi-decadal Collapse of East Antarctica’s Conger-Glenzer Ice Shelf

The Multi-decadal Collapse of East Antarctica’s Conger-Glenzer Ice Shelf | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article The Multi-decadal Collapse of East Antarctica’s Conger-Glenzer Ice Shelf Catherine Walker, Joanna Millstein, Bertie Miles, Sue Cook, Alexander Fraser, and 5 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3991947/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 03 Dec, 2024 Read the published version in Nature Geoscience → Version 1 posted You are reading this latest preprint version Abstract Antarctica is losing net mass to the ocean; most of this loss has occurred in West Antarctica and the Antarctic Peninsula, which together hold ~5.5 m of sea level rise (SLR) potential. The East Antarctic Ice Sheet (EAIS) stores almost 10x more ice, and contributes the largest uncertainty to SLR projections, primarily due to insufficient process-scale observations. While EAIS has largely remained stable, it has recently started showing signs of change around its margins. We report the first-ever major ice shelf collapse observed in EAIS, culminating with the March 2022 disintegration of the Conger-Glenzer Ice Shelf, formerly comprising the eastern portion of Shackleton Ice Shelf (SIS) on Knox Coast. Overall, the collapse had four stages spanning several decades starting 1997-2000 when small calving events isolated it from SIS; in 2011, it retreated from a central pinning point, followed by relative quiescence for a decade; the remaining ~1200 km2 area disintegrated over a few days in mid-March 2022. While the pace of most previous ice shelf collapses has prevented detailed sampling, this long-term, multi-stage event provided the opportunity to sample and isolate processes involved in ice shelf collapse, enabling crucial data for early warning indicators and enhancing our understanding of EAIS dynamics and response to future ocean and atmospheric forcing. Earth and environmental sciences/Climate sciences/Cryospheric science Earth and environmental sciences/Solid Earth sciences/Geodynamics Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SupplementaryFiguresCongerManuscriptv1.pdf Cite Share Download PDF Status: Published Journal Publication published 03 Dec, 2024 Read the published version in Nature Geoscience → Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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