Publication Abstracts

Christ et al. 2023

Christ, A.J., T.M. Rittenour, P.R. Bierman, B.A. Keisling, P.C. Knutz, T.B. Thomsen, N. Keulen, J.C. Fosdick, S.R. Hemming, J.-L. Tison, P.-H. Blard, J.P. Steffensen, M.W. Caffee, L.B. Corbett, D. Dahl-Jensen, D.P. Dethier, A.J. Hidy, N. Perdrial, D.M. Peteet, E.J. Steig, and E.K. Thomas, 2023: Deglaciation of northwestern Greenland during Marine Isotope Stage 11. Science, 381, no. 6655, 330-335, doi:10.1126/science.ade4248.

Past interglacial climates with smaller ice sheets offer analogs for ice sheet response to future warming and contributions to sea level rise; however, well-dated geologic records from formerly ice-free areas are rare. Here we report that subglacial sediment from the Camp Century ice core preserves direct evidence that northwestern Greenland was ice free during the Marine Isotope Stage (MIS) 11 interglacial. Luminescence dating shows that sediment just beneath the ice sheet was deposited by flowing water in an ice-free environment 416±38 thousand years ago. Provenance analyses and cosmogenic nuclide data and calculations suggest the sediment was reworked from local materials and exposed at the surface <16 thousand years before deposition. Ice sheet modeling indicates that ice-free conditions at Camp Century require at least 1.4 meters of sea level equivalent contribution from the Greenland Ice Sheet.

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BibTeX Citation

@article{ch07510b,
  author={Christ, A. J. and Rittenour, T. M. and Bierman, P. R. and Keisling, B. A. and Knutz, P. C. and Thomsen, T. B. and Keulen, N. and Fosdick, J. C. and Hemming, S. R. and Tison, J.-L. and Blard, P.-H. and Steffensen, J. P. and Caffee, M. W. and Corbett, L. B. and Dahl-Jensen, D. and Dethier, D. P. and Hidy, A. J. and Perdrial, N. and Peteet, D. M. and Steig, E. J. and Thomas, E. K.},
  title={Deglaciation of northwestern Greenland during Marine Isotope Stage 11},
  year={2023},
  journal={Science},
  volume={381},
  number={6655},
  pages={330--335},
  doi={10.1126/science.ade4248},
}

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RIS Citation

TY  - JOUR
ID  - ch07510b
AU  - Christ, A. J.
AU  - Rittenour, T. M.
AU  - Bierman, P. R.
AU  - Keisling, B. A.
AU  - Knutz, P. C.
AU  - Thomsen, T. B.
AU  - Keulen, N.
AU  - Fosdick, J. C.
AU  - Hemming, S. R.
AU  - Tison, J.-L.
AU  - Blard, P.-H.
AU  - Steffensen, J. P.
AU  - Caffee, M. W.
AU  - Corbett, L. B.
AU  - Dahl-Jensen, D.
AU  - Dethier, D. P.
AU  - Hidy, A. J.
AU  - Perdrial, N.
AU  - Peteet, D. M.
AU  - Steig, E. J.
AU  - Thomas, E. K.
PY  - 2023
TI  - Deglaciation of northwestern Greenland during Marine Isotope Stage 11
JA  - Science
JO  - Science
VL  - 381
IS  - 6655
SP  - 330
EP  - 335
DO  - 10.1126/science.ade4248
ER  -

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