Earliest Holocene south Greenland ice sheet retreat within its late Holocene extent

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dc.contributor.authorCarlson, Anders E.
dc.contributor.authorWinsor, Kelsey
dc.contributor.authorUllman, David J.
dc.contributor.authorBrook, Edward J.
dc.contributor.authorRood, Dylan H.
dc.contributor.authorAxford, Yarrow
dc.contributor.authorLeGrande, Allegra N.
dc.contributor.authorAnslow, Faron
dc.contributor.authorSinclair, Gaylen
dc.date.accessioned2025-04-10T20:27:26Z
dc.date.available2025-04-10T20:27:26Z
dc.date.issued2014
dc.description.abstractEarly Holocene summer warmth drove dramatic Greenland ice sheet (GIS) retreat. Subsequent insolation‐driven cooling caused GIS margin readvance to late Holocene maxima, from which ice margins are now retreating. We use 10Be surface exposure ages from four locations between 69.4°N and 61.2°N to date when in the early Holocene south to west GIS margins retreated to within these late Holocene maximum extents. We find that this occurred at 11.1 ± 0.2 ka to 10.6 ± 0.5 ka in south Greenland, significantly earlier than previous estimates, and 6.8 ± 0.1 ka to 7.9 ± 0.1 ka in southwest to west Greenland, consistent with existing 10Be ages. At least in south Greenland, these 10Be ages likely provide a minimum constraint for when on a multicentury timescale summer temperatures after the last deglaciation warmed above late Holocene temperatures in the early Holocene. Current south Greenland ice margin retreat suggests that south Greenland may have now warmed to or above earliest Holocene summer temperatures.
dc.description.reviewstatusReviewed
dc.description.scholarlevelFaculty
dc.identifier.citationCarlson, A. E., Winsor, K., Ullman, D. J., Brook, E. J., Rood, D. H., Axford, Y., LeGrande, A. N., Anslow, F., & Sinclair, G. (2014). Earliest Holocene south Greenland ice sheet retreat within its late Holocene extent. Geophys. Res. Lett., 41(15), 5514–5521. https://doi.org/10.1002/2014GL060800
dc.identifier.urihttps://doi.org/10.1002/2014GL060800
dc.identifier.urihttps://hdl.handle.net/1828/21793
dc.language.isoen
dc.publisherGeophysical Research Letters
dc.subjectUN SDG 13: Climate Action
dc.subjectGreenland ice sheet
dc.subjectcomogenic dating
dc.subjectearly Holocene climate
dc.subject#journal article
dc.subjectPacific Climate Impacts Consortium (PCIC)
dc.titleEarliest Holocene south Greenland ice sheet retreat within its late Holocene extent
dc.typeArticle

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