dc.contributor |
Háskóli Íslands |
dc.contributor |
University of Iceland |
dc.contributor.author |
Nielsen, Lisbeth T. |
dc.contributor.author |
Adalgeirsdottir, Gudfinna |
dc.contributor.author |
Gkinis, Vasileios |
dc.contributor.author |
Nuterman, Roman |
dc.contributor.author |
Hvidberg, Christine S. |
dc.date.accessioned |
2018-11-02T10:30:55Z |
dc.date.available |
2018-11-02T10:30:55Z |
dc.date.issued |
2018-05-22 |
dc.identifier.citation |
Nielsen, L. T., AÐAlgeirsdÓTtir, G., Gkinis, V., Nuterman, R., & Hvidberg, C. S. (2018). The effect of a Holocene climatic optimum on the evolution of the Greenland ice sheet during the last 10 kyr. Journal of Glaciology, 64(245), 477-488. doi:10.1017/jog.2018.40 |
dc.identifier.issn |
0022-1430 |
dc.identifier.issn |
1727-5652 (e-ISSN) |
dc.identifier.uri |
https://hdl.handle.net/20.500.11815/887 |
dc.description |
Publisher's version (útgefin grein) |
dc.description.abstract |
The Holocene climatic optimum was a period 8–5 kyr ago when annual mean surface temperatures in Greenland were 2–3°C warmer than present-day values. However, this warming left little imprint on commonly used temperature proxies often used to derive the climate forcing for simulations of the past evolution of the Greenland ice sheet. In this study, we investigate the evolution of the Greenland ice sheet through the Holocene when forced by different proxy-derived temperature histories from ice core records, focusing on the effect of sustained higher surface temperatures during the early Holocene. We find that the ice sheet retreats to a minimum volume of ~0.15–1.2 m sea-level equivalent smaller than present in the early or mid-Holocene when forcing an ice-sheet model with temperature reconstructions that contain a climatic optimum, and that the ice sheet has continued to recover from this minimum up to present day. Reconstructions without a warm climatic optimum in the early Holocene result in smaller ice losses continuing throughout the last 10 kyr. For all the simulated ice-sheet histories, the ice sheet is approaching a steady state at the end of the 20th century. |
dc.description.sponsorship |
This work is supported by the Danish National Research
Foundation under the Centre for Ice and Climate,
University of Copenhagen and Villum Investigator Project
IceFlow. Brice Noël and Michiel van den Broeke (IMAU,
Utrecht University) are thanked for providing the
RACMO2.3 Greenland SMB, precipitation and temperature
data. B. Vinther is thanked for providing the Holocene accumulation
reconstruction for the GRIP site. We are grateful for
computing resources provided by the Danish Center for
Climate Computing, a facility build with support of the
Danish e-Infrastructure Corporation and the Niels Bohr
Institute. Development of PISM is supported by NASA
grants NNX13AM16G and NNX13AK27G. We thank the
anonymous reviewers and Ralf Greve for their helpful suggestions
which substantially improved the paper. |
dc.format.extent |
477-488 |
dc.language.iso |
en |
dc.publisher |
Cambridge University Press (CUP) |
dc.relation.ispartofseries |
Journal of Glaciology;64(245) |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.subject |
Ice core |
dc.subject |
Ice-sheet modelling |
dc.subject |
Paleoclimate |
dc.subject |
Jöklarannsóknir |
dc.subject |
Nýlífsöld |
dc.subject |
Loftslagsrannsóknir |
dc.subject |
Grænland |
dc.title |
The effect of a Holocene climatic optimum on the evolution of the Greenland ice sheet during the last 10 kyr |
dc.type |
info:eu-repo/semantics/article |
dcterms.license |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. |
dc.description.version |
Peer Reviewed |
dc.identifier.journal |
Journal of Glaciology |
dc.identifier.doi |
10.1017/jog.2018.40 |
dc.relation.url |
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000400 |
dc.contributor.department |
Jarðvísindastofnun (HÍ) |
dc.contributor.department |
Institute of Earth Sciences (UI) |
dc.contributor.school |
Verkfræði- og náttúruvísindasvið (HÍ) |
dc.contributor.school |
School of Engineering and Natural Sciences (UI) |