Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes

Research output: Contribution to journal › Journal article › Research › peer-review

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Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes. / Sadatzki, Henrik; Maffezzoli, Niccolo; Dokken, Trond M.; Simon, Margit H.; Berben, Sarah M. P.; Fahl, Kirsten; Kjor, Helle A.; Spolaor, Andrea; Stein, Ruediger; Vallelonga, Paul; Vinther, Bo M.; Jansen, Eystein.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 117, No. 47, 24.11.2020, p. 29478-29486.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Sadatzki, H, Maffezzoli, N, Dokken, TM, Simon, MH, Berben, SMP, Fahl, K, Kjor, HA, Spolaor, A, Stein, R, Vallelonga, P, Vinther, BM & Jansen, E 2020, 'Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes', Proceedings of the National Academy of Sciences of the United States of America, vol. 117, no. 47, pp. 29478-29486. https://doi.org/10.1073/pnas.2005849117

APA

Sadatzki, H., Maffezzoli, N., Dokken, T. M., Simon, M. H., Berben, S. M. P., Fahl, K., Kjor, H. A., Spolaor, A., Stein, R., Vallelonga, P., Vinther, B. M., & Jansen, E. (2020). Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes. Proceedings of the National Academy of Sciences of the United States of America, 117(47), 29478-29486. https://doi.org/10.1073/pnas.2005849117

Vancouver

Sadatzki H, Maffezzoli N, Dokken TM, Simon MH, Berben SMP, Fahl K et al. Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes. Proceedings of the National Academy of Sciences of the United States of America. 2020 Nov 24;117(47):29478-29486. https://doi.org/10.1073/pnas.2005849117

Author

Sadatzki, Henrik ; Maffezzoli, Niccolo ; Dokken, Trond M. ; Simon, Margit H. ; Berben, Sarah M. P. ; Fahl, Kirsten ; Kjor, Helle A. ; Spolaor, Andrea ; Stein, Ruediger ; Vallelonga, Paul ; Vinther, Bo M. ; Jansen, Eystein. / Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes. In: Proceedings of the National Academy of Sciences of the United States of America. 2020 ; Vol. 117, No. 47. pp. 29478-29486.

Bibtex

@article{3cc7b753fba842c9b7e34b3926e24857,
title = "Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes",
abstract = "Constraining the past sea ice variability in the Nordic Seas is critical for a comprehensive understanding of the abrupt DansgaardOeschger (D-O) climate changes during the last glacial. Here we present unprecedentedly detailed sea ice proxy evidence from two Norwegian Sea sediment cores and an East Greenland ice core to resolve and constrain sea ice variations during four D-O events between 32 and 41 ka. Our independent sea ice records consistently reveal a millennial-scale variability and threshold response between an extensive seasonal sea ice cover in the Nordic Seas during cold stadials and reduced seasonal sea ice conditions during warmer interstadials. They document substantial and rapid sea ice reductions that may have happened within 250 y or less, concomitant with reinvigoration of deep convection in the Nordic Seas and the abrupt warming transitions in Greenland. Our empirical evidence thus underpins the cardinal role of rapid sea ice decline and related feedbacks to trigger abrupt and large-amplitude climate change of the glacial D-O events.",
keywords = "sea ice, Nordic Seas, Dansgaard-Oeschger events, abrupt climate change, HIGH-RESOLUTION RECORD, NORTH-ATLANTIC, HALOGEN DEPOSITION, OCEAN CIRCULATION, BIOMARKER, MARINE, RECONSTRUCTIONS, INSTABILITY, CONVECTION, ANOMALIES",
author = "Henrik Sadatzki and Niccolo Maffezzoli and Dokken, {Trond M.} and Simon, {Margit H.} and Berben, {Sarah M. P.} and Kirsten Fahl and Kjor, {Helle A.} and Andrea Spolaor and Ruediger Stein and Paul Vallelonga and Vinther, {Bo M.} and Eystein Jansen",
year = "2020",
month = nov,
day = "24",
doi = "10.1073/pnas.2005849117",
language = "English",
volume = "117",
pages = "29478--29486",
journal = "Proceedings of the National Academy of Sciences of the United States of America",
issn = "0027-8424",
publisher = "The National Academy of Sciences of the United States of America",
number = "47",

}

RIS

TY - JOUR

T1 - Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes

AU - Sadatzki, Henrik

AU - Maffezzoli, Niccolo

AU - Dokken, Trond M.

AU - Simon, Margit H.

AU - Berben, Sarah M. P.

AU - Fahl, Kirsten

AU - Kjor, Helle A.

AU - Spolaor, Andrea

AU - Stein, Ruediger

AU - Vallelonga, Paul

AU - Vinther, Bo M.

AU - Jansen, Eystein

PY - 2020/11/24

Y1 - 2020/11/24

N2 - Constraining the past sea ice variability in the Nordic Seas is critical for a comprehensive understanding of the abrupt DansgaardOeschger (D-O) climate changes during the last glacial. Here we present unprecedentedly detailed sea ice proxy evidence from two Norwegian Sea sediment cores and an East Greenland ice core to resolve and constrain sea ice variations during four D-O events between 32 and 41 ka. Our independent sea ice records consistently reveal a millennial-scale variability and threshold response between an extensive seasonal sea ice cover in the Nordic Seas during cold stadials and reduced seasonal sea ice conditions during warmer interstadials. They document substantial and rapid sea ice reductions that may have happened within 250 y or less, concomitant with reinvigoration of deep convection in the Nordic Seas and the abrupt warming transitions in Greenland. Our empirical evidence thus underpins the cardinal role of rapid sea ice decline and related feedbacks to trigger abrupt and large-amplitude climate change of the glacial D-O events.

AB - Constraining the past sea ice variability in the Nordic Seas is critical for a comprehensive understanding of the abrupt DansgaardOeschger (D-O) climate changes during the last glacial. Here we present unprecedentedly detailed sea ice proxy evidence from two Norwegian Sea sediment cores and an East Greenland ice core to resolve and constrain sea ice variations during four D-O events between 32 and 41 ka. Our independent sea ice records consistently reveal a millennial-scale variability and threshold response between an extensive seasonal sea ice cover in the Nordic Seas during cold stadials and reduced seasonal sea ice conditions during warmer interstadials. They document substantial and rapid sea ice reductions that may have happened within 250 y or less, concomitant with reinvigoration of deep convection in the Nordic Seas and the abrupt warming transitions in Greenland. Our empirical evidence thus underpins the cardinal role of rapid sea ice decline and related feedbacks to trigger abrupt and large-amplitude climate change of the glacial D-O events.

KW - sea ice

KW - Nordic Seas

KW - Dansgaard-Oeschger events

KW - abrupt climate change

KW - HIGH-RESOLUTION RECORD

KW - NORTH-ATLANTIC

KW - HALOGEN DEPOSITION

KW - OCEAN CIRCULATION

KW - BIOMARKER

KW - MARINE

KW - RECONSTRUCTIONS

KW - INSTABILITY

KW - CONVECTION

KW - ANOMALIES

U2 - 10.1073/pnas.2005849117

DO - 10.1073/pnas.2005849117

M3 - Journal article

C2 - 33168751

VL - 117

SP - 29478

EP - 29486

JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

SN - 0027-8424

IS - 47

ER -

ID: 253650208