Rapid early Holocene deglaciation of the Laurentide ice sheet
The demise of the Laurentide ice sheet during the early Holocene epoch is the most recent and best constrained disappearance of a large ice sheet in the Northern Hemisphere, and thus allows an assessment of rates of ice-sheet decay as well as attendant contributions to sea level rise. Here, we use t...
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ftcaltechauth:oai:authors.library.caltech.edu:11752 2023-05-15T16:29:20+02:00 Rapid early Holocene deglaciation of the Laurentide ice sheet Carlson, Anders E. LeGrande, Allegra N. Oppo, Delia W. Came, Rosemarie E. Schmidt, Gavin A. Anslow, Faron S. Licciardi, Joseph M. Obbink, Elizabeth A. 2008-09 application/pdf https://authors.library.caltech.edu/11752/ https://authors.library.caltech.edu/11752/1/CARng08.pdf https://authors.library.caltech.edu/11752/2/ngeo285-s1.pdf https://resolver.caltech.edu/CaltechAUTHORS:CARng08 en eng Nature Publishing Group https://authors.library.caltech.edu/11752/1/CARng08.pdf https://authors.library.caltech.edu/11752/2/ngeo285-s1.pdf Carlson, Anders E. and LeGrande, Allegra N. and Oppo, Delia W. and Came, Rosemarie E. and Schmidt, Gavin A. and Anslow, Faron S. and Licciardi, Joseph M. and Obbink, Elizabeth A. (2008) Rapid early Holocene deglaciation of the Laurentide ice sheet. Nature Geoscience, 1 (9). pp. 620-624. ISSN 1752-0894. doi:10.1038/ngeo285. https://resolver.caltech.edu/CaltechAUTHORS:CARng08 <https://resolver.caltech.edu/CaltechAUTHORS:CARng08> other Caltech Library Services Article PeerReviewed 2008 ftcaltechauth https://doi.org/10.1038/ngeo285 2021-11-11T18:41:08Z The demise of the Laurentide ice sheet during the early Holocene epoch is the most recent and best constrained disappearance of a large ice sheet in the Northern Hemisphere, and thus allows an assessment of rates of ice-sheet decay as well as attendant contributions to sea level rise. Here, we use terrestrial and marine records of the deglaciation to identify two periods of rapid melting during the final demise of the Laurentide ice sheet, when melting ice contributed about 1.3 and 0.7 cm of sea level rise per year, respectively. Our simulations with a fully coupled ocean–atmosphere model suggest that increased ablation due to enhanced early Holocene boreal summer insolation was the predominant cause of Laurentide ice-sheet retreat. Although the surface radiative forcing in boreal summer during the early Holocene is twice as large as the greenhouse-gas forcing expected by the year 2100, the associated increase in summer surface air temperatures is very similar. We conclude that our geologic evidence for a rapid retreat of the Laurentide ice sheet may therefore describe a prehistoric precedent for mass balance changes of the Greenland ice sheet over the coming century. Article in Journal/Newspaper Greenland Ice Sheet Caltech Authors (California Institute of Technology) Greenland Nature Geoscience 1 9 620 624 |
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Caltech Authors (California Institute of Technology) |
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English |
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Caltech Library Services |
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Caltech Library Services Carlson, Anders E. LeGrande, Allegra N. Oppo, Delia W. Came, Rosemarie E. Schmidt, Gavin A. Anslow, Faron S. Licciardi, Joseph M. Obbink, Elizabeth A. Rapid early Holocene deglaciation of the Laurentide ice sheet |
topic_facet |
Caltech Library Services |
description |
The demise of the Laurentide ice sheet during the early Holocene epoch is the most recent and best constrained disappearance of a large ice sheet in the Northern Hemisphere, and thus allows an assessment of rates of ice-sheet decay as well as attendant contributions to sea level rise. Here, we use terrestrial and marine records of the deglaciation to identify two periods of rapid melting during the final demise of the Laurentide ice sheet, when melting ice contributed about 1.3 and 0.7 cm of sea level rise per year, respectively. Our simulations with a fully coupled ocean–atmosphere model suggest that increased ablation due to enhanced early Holocene boreal summer insolation was the predominant cause of Laurentide ice-sheet retreat. Although the surface radiative forcing in boreal summer during the early Holocene is twice as large as the greenhouse-gas forcing expected by the year 2100, the associated increase in summer surface air temperatures is very similar. We conclude that our geologic evidence for a rapid retreat of the Laurentide ice sheet may therefore describe a prehistoric precedent for mass balance changes of the Greenland ice sheet over the coming century. |
format |
Article in Journal/Newspaper |
author |
Carlson, Anders E. LeGrande, Allegra N. Oppo, Delia W. Came, Rosemarie E. Schmidt, Gavin A. Anslow, Faron S. Licciardi, Joseph M. Obbink, Elizabeth A. |
author_facet |
Carlson, Anders E. LeGrande, Allegra N. Oppo, Delia W. Came, Rosemarie E. Schmidt, Gavin A. Anslow, Faron S. Licciardi, Joseph M. Obbink, Elizabeth A. |
author_sort |
Carlson, Anders E. |
title |
Rapid early Holocene deglaciation of the Laurentide ice sheet |
title_short |
Rapid early Holocene deglaciation of the Laurentide ice sheet |
title_full |
Rapid early Holocene deglaciation of the Laurentide ice sheet |
title_fullStr |
Rapid early Holocene deglaciation of the Laurentide ice sheet |
title_full_unstemmed |
Rapid early Holocene deglaciation of the Laurentide ice sheet |
title_sort |
rapid early holocene deglaciation of the laurentide ice sheet |
publisher |
Nature Publishing Group |
publishDate |
2008 |
url |
https://authors.library.caltech.edu/11752/ https://authors.library.caltech.edu/11752/1/CARng08.pdf https://authors.library.caltech.edu/11752/2/ngeo285-s1.pdf https://resolver.caltech.edu/CaltechAUTHORS:CARng08 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
https://authors.library.caltech.edu/11752/1/CARng08.pdf https://authors.library.caltech.edu/11752/2/ngeo285-s1.pdf Carlson, Anders E. and LeGrande, Allegra N. and Oppo, Delia W. and Came, Rosemarie E. and Schmidt, Gavin A. and Anslow, Faron S. and Licciardi, Joseph M. and Obbink, Elizabeth A. (2008) Rapid early Holocene deglaciation of the Laurentide ice sheet. Nature Geoscience, 1 (9). pp. 620-624. ISSN 1752-0894. doi:10.1038/ngeo285. https://resolver.caltech.edu/CaltechAUTHORS:CARng08 <https://resolver.caltech.edu/CaltechAUTHORS:CARng08> |
op_rights |
other |
op_doi |
https://doi.org/10.1038/ngeo285 |
container_title |
Nature Geoscience |
container_volume |
1 |
container_issue |
9 |
container_start_page |
620 |
op_container_end_page |
624 |
_version_ |
1766019034657062912 |