New 10Be exposure ages improve Holocene ice sheet thinning history near the grounding line of Pope Glacier, Antarctica

Evidence for the timing and pace of past grounding line retreat of the Thwaites Glacier system in the Amundsen Sea embayment (ASE) of Antarctica provides constraints for models that are used to predict the future trajectory of the West Antarctic Ice Sheet (WAIS). Existing cosmogenic nuclide surface...

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Veröffentlicht in:	The cryosphere 2022-12, Vol.16 (12), p.4887-4905
Hauptverfasser:	Adams, Jonathan R, Johnson, Joanne S, Roberts, Stephen J, Mason, Philippa J, Nichols, Keir A, Venturelli, Ryan A, Wilcken, Klaus, Balco, Greg, Goehring, Brent, Hall, Brenda, Woodward, John, Rood, Dylan H
Format:	Artikel
Sprache:	eng
Schlagworte:	Age Antarctic ice sheet Beryllium 10 Cobblestone Confidence intervals Constraint modelling Deglaciation Exposure Flow velocity Glaciation Glacier retreat Glaciers Heredity Holocene Holocene ice Ice Ice sheets Ice shelves Meltwater Regression analysis Sea level Statistical analysis Thickening Thinning Topography Tributaries Vertical profiles
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Beschreibung
Zusammenfassung:	Evidence for the timing and pace of past grounding line retreat of the Thwaites Glacier system in the Amundsen Sea embayment (ASE) of Antarctica provides constraints for models that are used to predict the future trajectory of the West Antarctic Ice Sheet (WAIS). Existing cosmogenic nuclide surface exposure ages suggest that Pope Glacier, a former tributary of Thwaites Glacier, experienced rapid thinning in the early to mid-Holocene. There are relatively few exposure ages from the lower ice-free sections of Mt. Murphy (
ISSN:	1994-0424 1994-0416 1994-0416 1994-0424
DOI:	10.5194/tc-16-4887-2022