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

Publikation: Bidrag til tidsskrift › Artikel › Forskning › peer review

11 Citationer (Scopus)

Resumé

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.

Originalsprog	Engelsk
Sider (fra-til)	330-335
Antal sider	6
Tidsskrift	Science
Vol/bind	381
Udgave nummer	6655
DOI	https://doi.org/10.1126/science.ade4248
Status	Udgivet - 21 jul. 2023

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Programområde 5: Natur og klima

FN’s Verdensmål

Dette resultat bidrager til følgende verdensmål

Adgang til dokumentet

10.1126/science.ade4248

Citationsformater

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",

issn = "0036-8075",

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

number = "6655",

}

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, bind 381, nr. 6655, s. 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

UR - http://www.scopus.com/inward/record.url?scp=85169693780&partnerID=8YFLogxK

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

Resumé

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FN’s Verdensmål

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