Reconstructing the Greenland ice sheet in past warm climates
The stability of the Greenland ice sheet through past glacial-interglacial cycles provides knowledge that can contribute to understanding the future mass loss from the Greenland ice sheet in a warmer climate. Paleo-climatic records from ice cores provide constraints on the past climate and ice sheet...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5021082 2023-07-30T03:59:15+02:00 Reconstructing the Greenland ice sheet in past warm climates Hvidberg, C. Lauritzen, M. Rathmann, N. Solgaard, A. Dahl-Jensen, D. 2023-07-11 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021082 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-4673 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021082 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-4673 2023-07-09T23:40:22Z The stability of the Greenland ice sheet through past glacial-interglacial cycles provides knowledge that can contribute to understanding the future mass loss from the Greenland ice sheet in a warmer climate. Paleo-climatic records from ice cores provide constraints on the past climate and ice sheet thickness in Greenland through the current interglacial, the Holocene, 11.7 kyr to present, but is limited to a few ice cores from the central areas. In the previous interglacial period, the Eemian, 130 kyr to 110 kyr before present, the ice core constraints are sparse, and beyond the Eemian, the climate evolution is known from Antarctic ice cores and marine sediments. Here we present initial results from an ice flow modelling study using the PISM ice flow model to simulate the evolution of the Greenland ice sheet in the Eemian and the Holocene periods. We discuss how paleo-climatic data from ice cores and marine sediments can be combined with ice flow modelling. We find that the Greenland ice sheet retreated to a minimum volume of up to ∼1.2 m sea-level equivalent smaller than present in the early or mid-Holocene, and that the ice sheet has continued to recover from this minimum up to present day. In all our runs, the ice sheet is approaching a steady state at the end of the 20th century. Our studies show that the Greenland ice sheet evolves on shorter and longer timescales, and that assessment of future mass loss must take into account the history and current state. Conference Object Antarc* Antarctic Greenland ice core Ice Sheet GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Antarctic Greenland |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
The stability of the Greenland ice sheet through past glacial-interglacial cycles provides knowledge that can contribute to understanding the future mass loss from the Greenland ice sheet in a warmer climate. Paleo-climatic records from ice cores provide constraints on the past climate and ice sheet thickness in Greenland through the current interglacial, the Holocene, 11.7 kyr to present, but is limited to a few ice cores from the central areas. In the previous interglacial period, the Eemian, 130 kyr to 110 kyr before present, the ice core constraints are sparse, and beyond the Eemian, the climate evolution is known from Antarctic ice cores and marine sediments. Here we present initial results from an ice flow modelling study using the PISM ice flow model to simulate the evolution of the Greenland ice sheet in the Eemian and the Holocene periods. We discuss how paleo-climatic data from ice cores and marine sediments can be combined with ice flow modelling. We find that the Greenland ice sheet retreated to a minimum volume of up to ∼1.2 m sea-level equivalent smaller than present in the early or mid-Holocene, and that the ice sheet has continued to recover from this minimum up to present day. In all our runs, the ice sheet is approaching a steady state at the end of the 20th century. Our studies show that the Greenland ice sheet evolves on shorter and longer timescales, and that assessment of future mass loss must take into account the history and current state. |
format |
Conference Object |
author |
Hvidberg, C. Lauritzen, M. Rathmann, N. Solgaard, A. Dahl-Jensen, D. |
spellingShingle |
Hvidberg, C. Lauritzen, M. Rathmann, N. Solgaard, A. Dahl-Jensen, D. Reconstructing the Greenland ice sheet in past warm climates |
author_facet |
Hvidberg, C. Lauritzen, M. Rathmann, N. Solgaard, A. Dahl-Jensen, D. |
author_sort |
Hvidberg, C. |
title |
Reconstructing the Greenland ice sheet in past warm climates |
title_short |
Reconstructing the Greenland ice sheet in past warm climates |
title_full |
Reconstructing the Greenland ice sheet in past warm climates |
title_fullStr |
Reconstructing the Greenland ice sheet in past warm climates |
title_full_unstemmed |
Reconstructing the Greenland ice sheet in past warm climates |
title_sort |
reconstructing the greenland ice sheet in past warm climates |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021082 |
geographic |
Antarctic Greenland |
geographic_facet |
Antarctic Greenland |
genre |
Antarc* Antarctic Greenland ice core Ice Sheet |
genre_facet |
Antarc* Antarctic Greenland ice core Ice Sheet |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-4673 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021082 |
op_doi |
https://doi.org/10.57757/IUGG23-4673 |
_version_ |
1772809984865730560 |