Skip to content

Research at St Andrews

Preliminary 10Be chronology for the last deglaciation of the western margin of the Greenland Ice Sheet

Research output: Contribution to journalArticle

DOI

Author(s)

Vincent Rinterknecht, Y Gorokhovich, J Schaefer, M Caffee

School/Research organisations

Abstract

The now acknowledged thinning of the Greenland Ice Sheet raises concerns about its potential contribution to future sea level rise. In order to appreciate the full extent of its contribution to sea level rise, reconstruction of the ice sheet's most recent last deglaciation could provide key information on the timing and the height of the ice sheet at a time of rapid climate readjustment. We measured 10Be concentrations in 12 samples collected along longitudinal and altitudinal transects from Sisimiut to within 10 km of the Isunguata Sermia Glacier ice margin on the western coast of Greenland. Along the longitudinal transect, we collected three perched boulders and two bedrocks. In addition, we sampled seven perched boulders along a vertical transect in a valley within 10 km of the Isunguata Sermia Glacier ice margin. Our pilot dataset constrains the height of the ice sheet during the Last Glacial Maximum (LGM) between 500 m and 840 m (including the 120 m relative sea level depression at the time of the LGM, 21 ka BP). From the transect we estimate the thinning of the ice sheet at the end of the deglaciation between 12.3 ± 1.5 10Be ka (n = 2) and 8.3 ± 1.2 10Be ka (n = 3) to be ∼6 cm a−1 over this time period. Direct dating of the retreat of the western margin of the Greenland Ice Sheet has the potential to better constrain the retreat rate of the ice margin, the thickness of the former ice sheet as well as its response to climate change. Copyright © 2008 John Wiley & Sons,
Close

Details

Original languageEnglish
Pages (from-to)270-278
JournalJournal of Quaternary Science
Volume24
Issue number3
Early online date22 Oct 2008
DOIs
Publication statusPublished - Mar 2009

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by journal

  1. Journal of Quaternary Science (Journal)

    Colin Ballantyne (Member of editorial board)
    1994 → …

    Activity: Publication peer-review and editorial work typesEditor of research journal

Related by journal

  1. Deglaciation chronology of the Donegal Ice Centre, north-west Ireland

    Wilson, P., Ballantyne, C. K., Benetti, S., Small, D., Fabel, D. & Clark, C. D., 11 Jan 2019, In : Journal of Quaternary Science. 34, 1, p. 16-28 13 p.

    Research output: Contribution to journalArticle

  2. Continuous human presence without extensive reductions in forest cover over the past 2500 years in an aseasonal Amazonian rainforest

    Kelly, T. J., Lawson, I. T., Roucoux, K. H., Baker, T. R., Honorio-Coronado, E. N., Jones, T. D. & Rivas Panduro, S., 4 May 2018, In : Journal of Quaternary Science. 33, 4, p. 369-379 11 p.

    Research output: Contribution to journalArticle

  3. Ice margin oscillations during deglaciation of the northern Irish Sea Basin

    Chiverrell, R. C., Smedley, R. K., Small, D., Ballantyne, C. K., Burke, M. J., Callard, S. L., Clark, C. D., Duller, G. A. T., Evans, D. J. A., Fabel, D., van Landeghem, K., Livingstone, S., O Cofaigh, C., Thomas, G. S. P., Roberts, D. H., Saher, M., Scourse, J. D. & Wilson, P., 9 Oct 2018, In : Journal of Quaternary Science. 33, 7, p. 739-762 24 p.

    Research output: Contribution to journalArticle

  4. The presence of Holocene cryptotephra in Wales and southern England

    Watson, E. J., Swindles, G. T., Lawson, I. T., Savov, I. P. & Wastegård, S., 12 May 2017, In : Journal of Quaternary Science. 32, 4, p. 493-500 8 p.

    Research output: Contribution to journalArticle

ID: 470717