Publication Abstracts

Carlson et al. 2014

Carlson, A.E., L. Winsor, D.J. Ullman, E.J. Brook, D.H. Rood, Y. Axford, A.N. LeGrande, F.S. Anslow, and G. Sinclair, 2014: Earliest Holocene south Greenland ice sheet retreat within its late Holocene extent. Geophys. Res. Lett., 41, no. 15, 5514-5521, doi:10.1002/2014GL060800.

Early 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.

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BibTeX Citation

@article{ca01520r,
  author={Carlson, A. E. and Winsor, L. and Ullman, D. J. and Brook, E. J. and Rood, D. H. and Axford, Y. and LeGrande, A. N. and Anslow, F. S. and Sinclair, G.},
  title={Earliest Holocene south Greenland ice sheet retreat within its late Holocene extent},
  year={2014},
  journal={Geophys. Res. Lett.},
  volume={41},
  number={15},
  pages={5514--5521},
  doi={10.1002/2014GL060800},
}

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RIS Citation

TY  - JOUR
ID  - ca01520r
AU  - Carlson, A. E.
AU  - Winsor, L.
AU  - Ullman, D. J.
AU  - Brook, E. J.
AU  - Rood, D. H.
AU  - Axford, Y.
AU  - LeGrande, A. N.
AU  - Anslow, F. S.
AU  - Sinclair, G.
PY  - 2014
TI  - Earliest Holocene south Greenland ice sheet retreat within its late Holocene extent
JA  - Geophys. Res. Lett.
VL  - 41
IS  - 15
SP  - 5514
EP  - 5521
DO  - 10.1002/2014GL060800
ER  -

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