Deglaciation of northwestern Greenland during Marine Isotope Stage 11

Andrew J. Christ; Tammy M. Rittenour; Paul R. Bierman; Benjamin A. Keisling; Paul C. Knutz; Tonny B. Thomsen; Nynke Keulen; Julie C. Fosdick; Sidney Hemming; J. L. Tison; Pierre-Henri Blard; Jørgen P. Steffensen; Marc W. Caffee; Lee B. Corbett; Dorthe Dahl-Jensen; David P. Dethier; Alan J. Hidy; Nicolas Perdrial; Dorothy M. Peteet; Eric J. Steig; Elizabeth K. Thomas

doi:10.1126/science.ade4248

Deglaciation of northwestern Greenland during Marine Isotope Stage 11

Andrew J. Christ, Tammy M. Rittenour, Paul R. Bierman, Benjamin A. Keisling, Paul C. Knutz, Tonny B. Thomsen, Nynke Keulen, Julie C. Fosdick, Sidney Hemming, J. L. Tison, Pierre-Henri Blard, Jørgen P. Steffensen, Marc W. Caffee, Lee B. Corbett, Dorthe Dahl-Jensen, David P. Dethier, Alan J. Hidy, Nicolas Perdrial, Dorothy M. Peteet, Eric J. SteigElizabeth K. Thomas

Research output: Contribution to journal › Article › Research › peer-review

11 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	330-335
Number of pages	6
Journal	Science
Volume	381
Issue number	6655
DOIs	https://doi.org/10.1126/science.ade4248
Publication status	Published - 21 Jul 2023

Keywords

Ice sheet
paleoclimate
Greenland
Camp Century

Programme Area

Programme Area 5: Nature and Climate

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1126/science.ade4248

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Christ, A. J., Rittenour, T. M., Bierman, P. R., Keisling, B. A., Knutz, P. C., Thomsen, T. B., Keulen, N., Fosdick, J. C., Hemming, S., Tison, J. L., Blard, P.-H., Steffensen, J. P., Caffee, M. W., Corbett, L. B., Dahl-Jensen, D., Dethier, D. P., Hidy, A. J., Perdrial, N., Peteet, D. M., ... Thomas, E. K. (2023). Deglaciation of northwestern Greenland during Marine Isotope Stage 11. Science, 381(6655), 330-335. https://doi.org/10.1126/science.ade4248

@article{dd2ee8c14ea54cf98ecd17f7f5b1cec3,

title = "Deglaciation of northwestern Greenland during Marine Isotope Stage 11",

abstract = "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.",

keywords = "Ice sheet, paleoclimate, Greenland, Camp Century",

author = "Christ, {Andrew J.} and Rittenour, {Tammy M.} and Bierman, {Paul R.} and Keisling, {Benjamin A.} and Knutz, {Paul C.} and Thomsen, {Tonny B.} and Nynke Keulen and Fosdick, {Julie C.} and Sidney Hemming and Tison, {J. L.} and Pierre-Henri Blard and Steffensen, {J{\o}rgen P.} and Caffee, {Marc W.} and Corbett, {Lee B.} and Dorthe Dahl-Jensen and Dethier, {David P.} and Hidy, {Alan J.} and Nicolas Perdrial and Peteet, {Dorothy M.} and Steig, {Eric J.} and Thomas, {Elizabeth K.}",

year = "2023",

month = jul,

day = "21",

doi = "10.1126/science.ade4248",

language = "English",

volume = "381",

pages = "330--335",

journal = "Science",

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publisher = "American Association for the Advancement of Science",

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Christ, AJ, Rittenour, TM, Bierman, PR, Keisling, BA, Knutz, PC , Thomsen, TB , Keulen, N, Fosdick, JC, Hemming, S, Tison, JL, Blard, P-H, Steffensen, JP, Caffee, MW, Corbett, LB, Dahl-Jensen, D, Dethier, DP, Hidy, AJ, Perdrial, N, Peteet, DM, Steig, EJ & Thomas, EK 2023, 'Deglaciation of northwestern Greenland during Marine Isotope Stage 11', Science, vol. 381, no. 6655, pp. 330-335. https://doi.org/10.1126/science.ade4248

TY - JOUR

T1 - Deglaciation of northwestern Greenland during Marine Isotope Stage 11

AU - Christ, Andrew J.

AU - Rittenour, Tammy M.

AU - Bierman, Paul R.

AU - Keisling, Benjamin A.

AU - Knutz, Paul C.

AU - Thomsen, Tonny B.

AU - Keulen, Nynke

AU - Fosdick, Julie C.

AU - Hemming, Sidney

AU - Tison, J. L.

AU - Blard, Pierre-Henri

AU - Steffensen, Jørgen P.

AU - Caffee, Marc W.

AU - Corbett, Lee B.

AU - Dahl-Jensen, Dorthe

AU - Dethier, David P.

AU - Hidy, Alan J.

AU - Perdrial, Nicolas

AU - Peteet, Dorothy M.

AU - Steig, Eric J.

AU - Thomas, Elizabeth K.

PY - 2023/7/21

Y1 - 2023/7/21

N2 - 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.

AB - 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.

KW - Ice sheet

KW - paleoclimate

KW - Greenland

KW - Camp Century

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U2 - 10.1126/science.ade4248

DO - 10.1126/science.ade4248

M3 - Article

SN - 0036-8075

VL - 381

SP - 330

EP - 335

JO - Science

JF - Science

IS - 6655

ER -

Deglaciation of northwestern Greenland during Marine Isotope Stage 11

Abstract

Keywords

Programme Area

UN SDGs

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