A data-model comparison on the glacial thinning history of Byrd Glacier, Antarctica

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dc.contributor.authorStutz, Jen_AU
dc.contributor.authorEaves, Sen_AU
dc.contributor.authorMoore, Cen_AU
dc.contributor.authorWilcken, KMen_AU
dc.contributor.authorNorton, Ken_AU
dc.contributor.authorLowry, Den_AU
dc.date.accessioned2023-01-19T02:07:33Zen_AU
dc.date.available2023-01-19T02:07:33Zen_AU
dc.date.issued2021-11-17en_AU
dc.date.statistics2022-05-27en_AU
dc.description.abstractResponse of marine based sectors of the Antarctic Ice Sheet (AIS) to projected warming remains a significant uncertainty in sea level rise projections. The aim of this project is to provide understanding of past mechanisms and feedbacks of ice sheet change, and to reduce uncertainty in projections of future change. We extend the satellite record of ice sheet change by targeting strategic locations around the margins of the Ross Ice Shelf, which is responsible for buttressing large sectors of the marine-based West AIS. At these locations, glacial sediments deposited on nunataks adjacent to dynamic ice margins record the transient evolution of ice thickness throughout the Holocene period. Here, we focus on the Byrd Glacier, which drains 10% of the East AIS by area and contributes ~20% of the total mass of the Ross Ice Shelf. At Lonewolf Nunataks along the upper Byrd Glacier, our cosmogenic surface exposure ages constrain (i) past rates of ice thinning; (ii) total magnitudes of ice elevation change; and (iii) the absolute timing of ice discharge and thinning events in these sensitive regions. In this presentation, we will review the existing knowledge of Transantarctic Mountain outlet glaciers and present new data from our 2019-20 season along the upper Byrd Glaciers. Comparing our data to recent regional-scale ice sheet model simulations of the last deglaciation, we observe a distinct time lag between modelled thinning and our data-constrained thinning history. Our new data-model comparison will inform high-resolution, sector-scale numerical glacier model experiments, in which we seek to determine drivers of ice sheet thinning and retreat. © The Authorsen_AU
dc.identifier.citationStutz, J., Eaves, S., Moore, C., Wilcken, K., Norton, K., & Lowry, D., (2021). A data-model comparison on the glacial thinning history of Byrd Glacier, Antarctica. Paper presented to the 15th International Conference on Accelerator Mass Spectrometry. ANSTO Sydney, Australia. November 15th – 19th, (pp. 24). Retrieved from: https://ams15sydney.com/wp-content/uploads/2021/11/AMS-15-Full-Program-and-Abstract-Book-R-1.pdfen_AU
dc.identifier.conferenceenddate19 November 2021en_AU
dc.identifier.conferencename15th International Conference on Accelerator Mass Spectrometryen_AU
dc.identifier.conferenceplaceSydney, Australiaen_AU
dc.identifier.conferencestartdate15 November 2021en_AU
dc.identifier.pagination24en_AU
dc.identifier.urihttps://ams15sydney.com/wp-content/uploads/2021/11/AMS-15-Full-Program-and-Abstract-Book-R-1.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14400en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Nuclear Science and Engineeringen_AU
dc.subjectGlaciersen_AU
dc.subjectAntarcticaen_AU
dc.subjectIceen_AU
dc.subjectSedimentsen_AU
dc.subjectGeologic depositsen_AU
dc.subjectElevationen_AU
dc.titleA data-model comparison on the glacial thinning history of Byrd Glacier, Antarcticaen_AU
dc.typeConference Paperen_AU
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