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,
, 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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