A "deep" ice core from East Greenland
Pilot studies on the Renland peninsula in Scoresbysund Fjord, East Greenland, indicated that the relatively small and separate Renland ice cap meets most of the criteria defining a favourable ice-core drill-site. In 1988, a Nordic expedition recovered a continuous surface-to-bedrock ice core from th...
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The Commission for Scientific Research in Greenland /Danish Polar Center
1992
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ftkbcopenhojs:oai:ojs.tidsskrift.dk:article/140329 2024-01-28T10:05:27+01:00 A "deep" ice core from East Greenland Johnsen, Sigfus J. Clausen, Henrik B. Dansgaard, Willi Gundestrup, Niels S. Hansson, Margareta Jonsson, Peter Steffensen, Jørgen P. Sveinbjørnsdottir, Arny E. 1992-11-24 application/pdf https://tidsskrift.dk/meddrgroenland_geosci/article/view/140329 eng eng The Commission for Scientific Research in Greenland /Danish Polar Center https://tidsskrift.dk/meddrgroenland_geosci/article/view/140329/184299 https://tidsskrift.dk/meddrgroenland_geosci/article/view/140329 Meddelelser om Grønland. Geoscience; Vol. 29 (1992): Meddelelser om Grønland. Geoscience; 22 pp. Meddelelser om Grønland. Geoscience; Årg. 29 (1992): Meddelelser om Grønland, Geoscience; 22 pp. 1600-4590 0106-1046 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1992 ftkbcopenhojs 2024-01-03T23:58:29Z Pilot studies on the Renland peninsula in Scoresbysund Fjord, East Greenland, indicated that the relatively small and separate Renland ice cap meets most of the criteria defining a favourable ice-core drill-site. In 1988, a Nordic expedition recovered a continuous surface-to-bedrock ice core from the summit. This relatively short core reaches deep into the past, probably throughout the last glaciation and through most of the preceding interglacial, Eem, 125,000 years B.P. The core contains detailed information on temporal changes of the coastal environment, and serves as a valuable complement to the new deep ice cores being drilled in Central Greenland. Core analyses suggest that (1) during Eemian time the East Greenland climate was at least 5°C warmer than now, and the precipitation 20% higher; (2) during the last glacial period, the precipitation decreased to a minimum, perhaps only 20% of the present value; (3) the post-glacial climatic optimum was 2.5°C warmer than now; (4) the long-term variability of the record is relatively low, due to isostatic movements in the area; and (5) from 70,000 years B.P., the Greenland glacial climate alternated between two quasi-stable stages. The latter point may reflect a chaotic feature of climate. If so, climate predictions will be difficult to access. Article in Journal/Newspaper East Greenland Greenland Ice cap ice core Scoresbysund Tidsskrift.dk (The Royal Library, Denmark) Greenland Renland ENVELOPE(-26.750,-26.750,71.200,71.200) |
institution |
Open Polar |
collection |
Tidsskrift.dk (The Royal Library, Denmark) |
op_collection_id |
ftkbcopenhojs |
language |
English |
description |
Pilot studies on the Renland peninsula in Scoresbysund Fjord, East Greenland, indicated that the relatively small and separate Renland ice cap meets most of the criteria defining a favourable ice-core drill-site. In 1988, a Nordic expedition recovered a continuous surface-to-bedrock ice core from the summit. This relatively short core reaches deep into the past, probably throughout the last glaciation and through most of the preceding interglacial, Eem, 125,000 years B.P. The core contains detailed information on temporal changes of the coastal environment, and serves as a valuable complement to the new deep ice cores being drilled in Central Greenland. Core analyses suggest that (1) during Eemian time the East Greenland climate was at least 5°C warmer than now, and the precipitation 20% higher; (2) during the last glacial period, the precipitation decreased to a minimum, perhaps only 20% of the present value; (3) the post-glacial climatic optimum was 2.5°C warmer than now; (4) the long-term variability of the record is relatively low, due to isostatic movements in the area; and (5) from 70,000 years B.P., the Greenland glacial climate alternated between two quasi-stable stages. The latter point may reflect a chaotic feature of climate. If so, climate predictions will be difficult to access. |
format |
Article in Journal/Newspaper |
author |
Johnsen, Sigfus J. Clausen, Henrik B. Dansgaard, Willi Gundestrup, Niels S. Hansson, Margareta Jonsson, Peter Steffensen, Jørgen P. Sveinbjørnsdottir, Arny E. |
spellingShingle |
Johnsen, Sigfus J. Clausen, Henrik B. Dansgaard, Willi Gundestrup, Niels S. Hansson, Margareta Jonsson, Peter Steffensen, Jørgen P. Sveinbjørnsdottir, Arny E. A "deep" ice core from East Greenland |
author_facet |
Johnsen, Sigfus J. Clausen, Henrik B. Dansgaard, Willi Gundestrup, Niels S. Hansson, Margareta Jonsson, Peter Steffensen, Jørgen P. Sveinbjørnsdottir, Arny E. |
author_sort |
Johnsen, Sigfus J. |
title |
A "deep" ice core from East Greenland |
title_short |
A "deep" ice core from East Greenland |
title_full |
A "deep" ice core from East Greenland |
title_fullStr |
A "deep" ice core from East Greenland |
title_full_unstemmed |
A "deep" ice core from East Greenland |
title_sort |
"deep" ice core from east greenland |
publisher |
The Commission for Scientific Research in Greenland /Danish Polar Center |
publishDate |
1992 |
url |
https://tidsskrift.dk/meddrgroenland_geosci/article/view/140329 |
long_lat |
ENVELOPE(-26.750,-26.750,71.200,71.200) |
geographic |
Greenland Renland |
geographic_facet |
Greenland Renland |
genre |
East Greenland Greenland Ice cap ice core Scoresbysund |
genre_facet |
East Greenland Greenland Ice cap ice core Scoresbysund |
op_source |
Meddelelser om Grønland. Geoscience; Vol. 29 (1992): Meddelelser om Grønland. Geoscience; 22 pp. Meddelelser om Grønland. Geoscience; Årg. 29 (1992): Meddelelser om Grønland, Geoscience; 22 pp. 1600-4590 0106-1046 |
op_relation |
https://tidsskrift.dk/meddrgroenland_geosci/article/view/140329/184299 https://tidsskrift.dk/meddrgroenland_geosci/article/view/140329 |
_version_ |
1789331747078406144 |