Greenland Ice Sheet influence on Last Interglacial climate: global sensitivity studies performed with an atmosphere–ocean general circulation model
During the Last Interglacial (LIG, ∼130–115kiloyears (kyr) before present (BP)), the northern high latitudes were characterized by higher temperatures than those of the late Holocene and a lower Greenland Ice Sheet (GIS). However, the impact of a reduced GIS on the global climate has not yet been we...
Published in: | Climate of the Past |
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Language: | English |
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Copernicus Publications (EGU)
2016
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Online Access: | https://oceanrep.geomar.de/id/eprint/44313/ https://oceanrep.geomar.de/id/eprint/44313/1/cp-12-1313-2016.pdf https://oceanrep.geomar.de/id/eprint/44313/2/cp-12-1313-2016-supplement.zip https://doi.org/10.5194/cp-12-1313-2016 |
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ftoceanrep:oai:oceanrep.geomar.de:44313 2023-08-27T04:09:45+02:00 Greenland Ice Sheet influence on Last Interglacial climate: global sensitivity studies performed with an atmosphere–ocean general circulation model Pfeiffer, Madlene Lohmann, Gerrit 2016-06-08 text archive https://oceanrep.geomar.de/id/eprint/44313/ https://oceanrep.geomar.de/id/eprint/44313/1/cp-12-1313-2016.pdf https://oceanrep.geomar.de/id/eprint/44313/2/cp-12-1313-2016-supplement.zip https://doi.org/10.5194/cp-12-1313-2016 en eng Copernicus Publications (EGU) https://oceanrep.geomar.de/id/eprint/44313/1/cp-12-1313-2016.pdf https://oceanrep.geomar.de/id/eprint/44313/2/cp-12-1313-2016-supplement.zip Pfeiffer, M. and Lohmann, G. (2016) Greenland Ice Sheet influence on Last Interglacial climate: global sensitivity studies performed with an atmosphere–ocean general circulation model. Open Access Climate of the Past, 12 (6). pp. 1313-1338. DOI 10.5194/cp-12-1313-2016 <https://doi.org/10.5194/cp-12-1313-2016>. doi:10.5194/cp-12-1313-2016 cc_by_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2016 ftoceanrep https://doi.org/10.5194/cp-12-1313-2016 2023-08-06T23:19:54Z During the Last Interglacial (LIG, ∼130–115kiloyears (kyr) before present (BP)), the northern high latitudes were characterized by higher temperatures than those of the late Holocene and a lower Greenland Ice Sheet (GIS). However, the impact of a reduced GIS on the global climate has not yet been well constrained. In this study, we quantify the contribution of the GIS to LIG warmth by performing various sensitivity studies based on equilibrium simulations, employing the Community Earth System Models (COSMOS), with a focus on height and extent of the GIS. We present the first study on the effects of a reduction in the GIS on the surface temperature (TS) on a global scale and separate the contribution of astronomical forcing and changes in GIS to LIG warmth. The strong Northern Hemisphere summer warming of approximately 2°C (with respect to pre-industrial) is mainly caused by increased summer insolation. Reducing the height by ∼ 1300m and the extent of the GIS does not have a strong influence during summer, leading to an additional global warming of only +0.24°C compared to the purely insolation-driven LIG. The effect of a reduction in the GIS is, however, strongest during local winter, with up to +5°C regional warming and with an increase in global average temperature of +0.48°C. In order to evaluate the performance of our LIG simulations, we additionally compare the simulated TS anomalies with marine and terrestrial proxy-based LIG temperature anomalies derived from three different proxy data compilations. Our model results are in good agreement with proxy records with respect to the warming pattern but underestimate the magnitude of temperature change when compared to reconstructions, suggesting a potential misinterpretation of the proxy records or deficits in our model. However, we are able to partly reduce the mismatch between model and data by additionally taking into account the potential seasonal bias of the proxy record and/or the uncertainties in the dating of the proxy records for the LIG thermal ... Article in Journal/Newspaper Greenland Ice Sheet OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Greenland Climate of the Past 12 6 1313 1338 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
During the Last Interglacial (LIG, ∼130–115kiloyears (kyr) before present (BP)), the northern high latitudes were characterized by higher temperatures than those of the late Holocene and a lower Greenland Ice Sheet (GIS). However, the impact of a reduced GIS on the global climate has not yet been well constrained. In this study, we quantify the contribution of the GIS to LIG warmth by performing various sensitivity studies based on equilibrium simulations, employing the Community Earth System Models (COSMOS), with a focus on height and extent of the GIS. We present the first study on the effects of a reduction in the GIS on the surface temperature (TS) on a global scale and separate the contribution of astronomical forcing and changes in GIS to LIG warmth. The strong Northern Hemisphere summer warming of approximately 2°C (with respect to pre-industrial) is mainly caused by increased summer insolation. Reducing the height by ∼ 1300m and the extent of the GIS does not have a strong influence during summer, leading to an additional global warming of only +0.24°C compared to the purely insolation-driven LIG. The effect of a reduction in the GIS is, however, strongest during local winter, with up to +5°C regional warming and with an increase in global average temperature of +0.48°C. In order to evaluate the performance of our LIG simulations, we additionally compare the simulated TS anomalies with marine and terrestrial proxy-based LIG temperature anomalies derived from three different proxy data compilations. Our model results are in good agreement with proxy records with respect to the warming pattern but underestimate the magnitude of temperature change when compared to reconstructions, suggesting a potential misinterpretation of the proxy records or deficits in our model. However, we are able to partly reduce the mismatch between model and data by additionally taking into account the potential seasonal bias of the proxy record and/or the uncertainties in the dating of the proxy records for the LIG thermal ... |
format |
Article in Journal/Newspaper |
author |
Pfeiffer, Madlene Lohmann, Gerrit |
spellingShingle |
Pfeiffer, Madlene Lohmann, Gerrit Greenland Ice Sheet influence on Last Interglacial climate: global sensitivity studies performed with an atmosphere–ocean general circulation model |
author_facet |
Pfeiffer, Madlene Lohmann, Gerrit |
author_sort |
Pfeiffer, Madlene |
title |
Greenland Ice Sheet influence on Last Interglacial climate: global sensitivity studies performed with an atmosphere–ocean general circulation model |
title_short |
Greenland Ice Sheet influence on Last Interglacial climate: global sensitivity studies performed with an atmosphere–ocean general circulation model |
title_full |
Greenland Ice Sheet influence on Last Interglacial climate: global sensitivity studies performed with an atmosphere–ocean general circulation model |
title_fullStr |
Greenland Ice Sheet influence on Last Interglacial climate: global sensitivity studies performed with an atmosphere–ocean general circulation model |
title_full_unstemmed |
Greenland Ice Sheet influence on Last Interglacial climate: global sensitivity studies performed with an atmosphere–ocean general circulation model |
title_sort |
greenland ice sheet influence on last interglacial climate: global sensitivity studies performed with an atmosphere–ocean general circulation model |
publisher |
Copernicus Publications (EGU) |
publishDate |
2016 |
url |
https://oceanrep.geomar.de/id/eprint/44313/ https://oceanrep.geomar.de/id/eprint/44313/1/cp-12-1313-2016.pdf https://oceanrep.geomar.de/id/eprint/44313/2/cp-12-1313-2016-supplement.zip https://doi.org/10.5194/cp-12-1313-2016 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
https://oceanrep.geomar.de/id/eprint/44313/1/cp-12-1313-2016.pdf https://oceanrep.geomar.de/id/eprint/44313/2/cp-12-1313-2016-supplement.zip Pfeiffer, M. and Lohmann, G. (2016) Greenland Ice Sheet influence on Last Interglacial climate: global sensitivity studies performed with an atmosphere–ocean general circulation model. Open Access Climate of the Past, 12 (6). pp. 1313-1338. DOI 10.5194/cp-12-1313-2016 <https://doi.org/10.5194/cp-12-1313-2016>. doi:10.5194/cp-12-1313-2016 |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-12-1313-2016 |
container_title |
Climate of the Past |
container_volume |
12 |
container_issue |
6 |
container_start_page |
1313 |
op_container_end_page |
1338 |
_version_ |
1775351337944350720 |