English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Early Last Interglacial ocean warming drove substantial ice mass loss from Antarctica

Turney, C. S. M., Fogwill, C. J., Golledge, N. R., McKay, N. P., van Sebille, E., Jones, R. T., Etheridge, D., Rubino, M., Thornton, D. P., Davies, S. M., Ramsey, C. B., Thomas, Z. A., Bird, M. I., Munksgaard, N. C., Kohno, M., Woodward, J., Winter, K., Weyrich, L. S., Rootes, C. M., Millman, H., Albert, P. G., Rivera, A., van Ommen, T., Curran, M., Moy, A., Rahmstorf, S., Kawamura, K., Hillenbrand, C.-D., Weber, M. E., Manning, C. J., Young, J., Cooper, A. (2020): Early Last Interglacial ocean warming drove substantial ice mass loss from Antarctica. - Proceedings of the National Academy of Sciences of the United States of America (PNAS), 117, 8, 3996-4006.
https://doi.org/10.1073/pnas.1902469117

Item is

Files

show Files
hide Files
:
25286oa.pdf (Publisher version), 3MB
Name:
25286oa.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Turney, Chris S. M.1, Author
Fogwill, Christopher J.1, Author
Golledge, Nicholas R.1, Author
McKay, Nicholas P.1, Author
van Sebille, Erik1, Author
Jones, Richard T.1, Author
Etheridge, David1, Author
Rubino, Mauro1, Author
Thornton, David P.1, Author
Davies, Siwan M.1, Author
Ramsey, Christopher Bronk1, Author
Thomas, Zoë A.1, Author
Bird, Michael I.1, Author
Munksgaard, Niels C.1, Author
Kohno, Mika1, Author
Woodward, John1, Author
Winter, Kate1, Author
Weyrich, Laura S.1, Author
Rootes, Camilla M.1, Author
Millman, Helen1, Author
Albert, Paul G.1, AuthorRivera, Andres1, Authorvan Ommen, Tas1, AuthorCurran, Mark1, AuthorMoy, Andrew1, AuthorRahmstorf, Stefan2, Author              Kawamura, Kenji1, AuthorHillenbrand, Claus-Dieter1, AuthorWeber, Michael E.1, AuthorManning, Christina J.1, AuthorYoung, Jennifer1, AuthorCooper, Alan1, Author more..
Affiliations:
1External Organizations, ou_persistent22              
2Potsdam Institute for Climate Impact Research, ou_persistent13              

Content

show
hide
Free keywords: -
 Abstract: The future response of the Antarctic ice sheet to rising temperatures remains highly uncertain. A useful period for assessing the sensitivity of Antarctica to warming is the Last Interglacial (LIG) (129 to 116 ky), which experienced warmer polar temperatures and higher global mean sea level (GMSL) (+6 to 9 m) relative to present day. LIG sea level cannot be fully explained by Greenland Ice Sheet melt (∼2 m), ocean thermal expansion, and melting mountain glaciers (∼1 m), suggesting substantial Antarctic mass loss was initiated by warming of Southern Ocean waters, resulting from a weakening Atlantic meridional overturning circulation in response to North Atlantic surface freshening. Here, we report a blue-ice record of ice sheet and environmental change from the Weddell Sea Embayment at the periphery of the marine-based West Antarctic Ice Sheet (WAIS), which is underlain by major methane hydrate reserves. Constrained by a widespread volcanic horizon and supported by ancient microbial DNA analyses, we provide evidence for substantial mass loss across the Weddell Sea Embayment during the LIG, most likely driven by ocean warming and associated with destabilization of subglacial hydrates. Ice sheet modeling supports this interpretation and suggests that millennial-scale warming of the Southern Ocean could have triggered a multimeter rise in global sea levels. Our data indicate that Antarctica is highly vulnerable to projected increases in ocean temperatures and may drive ice–climate feedbacks that further amplify warming.

Details

show
hide
Language(s):
 Dates: 2020-02-112020-02-25
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1073/pnas.1902469117
PIKDOMAIN: RD1 - Earth System Analysis
Organisational keyword: RD1 - Earth System Analysis
Research topic keyword: Ice
Regional keyword: Arctic & Antarctica
MDB-ID: Entry suspended
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Proceedings of the National Academy of Sciences of the United States of America (PNAS)
Source Genre: Journal, SCI, Scopus, p3
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 117 (8) Sequence Number: - Start / End Page: 3996 - 4006 Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/journals410
Publisher: National Academy of Sciences (NAS)