The effect of a Holocene climatic optimum on the evolution of the Greenland ice sheet during the last 10 kyr
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 evo...
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| Format: | Article |
| Language: | English |
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Cambridge University Press
2018-06-01
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| Series: | Journal of Glaciology |
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| Online Access: | https://www.cambridge.org/core/product/identifier/S0022143018000400/type/journal_article |
| _version_ | 1811155894191259648 |
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| author | LISBETH T. NIELSEN GUðFINNA AÐALGEIRSDÓTTIR VASILEIOS GKINIS ROMAN NUTERMAN CHRISTINE S. HVIDBERG |
| author_facet | LISBETH T. NIELSEN GUðFINNA AÐALGEIRSDÓTTIR VASILEIOS GKINIS ROMAN NUTERMAN CHRISTINE S. HVIDBERG |
| author_sort | LISBETH T. NIELSEN |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-10T04:41:16Z |
| format | Article |
| id | doaj.art-e50abd4299e94e03b75872854a17046b |
| institution | Directory Open Access Journal |
| issn | 0022-1430 1727-5652 |
| language | English |
| last_indexed | 2024-04-10T04:41:16Z |
| publishDate | 2018-06-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | Journal of Glaciology |
| spelling | doaj.art-e50abd4299e94e03b75872854a17046b2023-03-09T12:40:37ZengCambridge University PressJournal of Glaciology0022-14301727-56522018-06-016447748810.1017/jog.2018.40The effect of a Holocene climatic optimum on the evolution of the Greenland ice sheet during the last 10 kyrLISBETH T. NIELSEN0GUðFINNA AÐALGEIRSDÓTTIR1VASILEIOS GKINIS2ROMAN NUTERMAN3CHRISTINE S. HVIDBERG4Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, DenmarkInstitute of Earth Science, University of Iceland, Reykjavík, IcelandCentre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, DenmarkClimate and Geophysics Section, Niels Bohr Institute, University of Copenhagen, Copenhagen, DenmarkCentre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, DenmarkThe 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.https://www.cambridge.org/core/product/identifier/S0022143018000400/type/journal_articleice coreice-sheet modellingpaleoclimate |
| spellingShingle | LISBETH T. NIELSEN GUðFINNA AÐALGEIRSDÓTTIR VASILEIOS GKINIS ROMAN NUTERMAN CHRISTINE S. HVIDBERG The effect of a Holocene climatic optimum on the evolution of the Greenland ice sheet during the last 10 kyr Journal of Glaciology ice core ice-sheet modelling paleoclimate |
| title | The effect of a Holocene climatic optimum on the evolution of the Greenland ice sheet during the last 10 kyr |
| title_full | The effect of a Holocene climatic optimum on the evolution of the Greenland ice sheet during the last 10 kyr |
| title_fullStr | The effect of a Holocene climatic optimum on the evolution of the Greenland ice sheet during the last 10 kyr |
| title_full_unstemmed | The effect of a Holocene climatic optimum on the evolution of the Greenland ice sheet during the last 10 kyr |
| title_short | The effect of a Holocene climatic optimum on the evolution of the Greenland ice sheet during the last 10 kyr |
| title_sort | effect of a holocene climatic optimum on the evolution of the greenland ice sheet during the last 10 kyr |
| topic | ice core ice-sheet modelling paleoclimate |
| url | https://www.cambridge.org/core/product/identifier/S0022143018000400/type/journal_article |
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