A Closer look at the Proposed Late-Wisconsin-Weichselian Arctic Ice Sheet
Abstract The CLIMAP 18000 years b.p. experiment required reconstructing late-Wisconsin-Weichselian ice sheets. In the Northern Hemisphere, the greatest uncertainty in these reconstructions is the area covered by ice sheets. Two schools of thought exist (Hughes and others, in press). The minimum-ice-...
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Language: | English |
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Cambridge University Press (CUP)
1979
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Online Access: | http://dx.doi.org/10.1017/s0022143000015070 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000015070 |
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crcambridgeupr:10.1017/s0022143000015070 2024-03-03T08:41:17+00:00 A Closer look at the Proposed Late-Wisconsin-Weichselian Arctic Ice Sheet Fastook, J. L. Sweet, R. Hughes, T. J. 1979 http://dx.doi.org/10.1017/s0022143000015070 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000015070 en eng Cambridge University Press (CUP) Journal of Glaciology volume 24, issue 90, page 497-500 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1979 crcambridgeupr https://doi.org/10.1017/s0022143000015070 2024-02-08T08:39:08Z Abstract The CLIMAP 18000 years b.p. experiment required reconstructing late-Wisconsin-Weichselian ice sheets. In the Northern Hemisphere, the greatest uncertainty in these reconstructions is the area covered by ice sheets. Two schools of thought exist (Hughes and others, in press). The minimum-ice-sheet school holds that ice sheets originated from present ice caps in the High Arctic islands, but the northern seaward margins of these ice sheets retreated as the southern landward margins advanced. This occurred because northern margins became isolated from sources of precipitation as Arctic seas became permanently ice-covered and the advancing southern margin changed atmospheric circulation patterns. In this view, these ice sheets stay about the same size and migrate southward during an ice age. Northern margins rarely reach sea-level during the later stage of the ice age so no marine portions form and ablation is by melting or sublimation. Marine portions formed only when the ice sheets migrated across shallow seas between the High Arctic islands and the mainland. At the end of the ice age, huge amounts of heat had to be transferred from the tropics to the ice sheets in order to account for late-Wisconsin-Weichselian and Holocene retreat-rates by melting along ice-sheet margins. Article in Journal/Newspaper Arctic Ice Sheet Journal of Glaciology Cambridge University Press Arctic Journal of Glaciology 24 90 497 500 |
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Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Fastook, J. L. Sweet, R. Hughes, T. J. A Closer look at the Proposed Late-Wisconsin-Weichselian Arctic Ice Sheet |
topic_facet |
Earth-Surface Processes |
description |
Abstract The CLIMAP 18000 years b.p. experiment required reconstructing late-Wisconsin-Weichselian ice sheets. In the Northern Hemisphere, the greatest uncertainty in these reconstructions is the area covered by ice sheets. Two schools of thought exist (Hughes and others, in press). The minimum-ice-sheet school holds that ice sheets originated from present ice caps in the High Arctic islands, but the northern seaward margins of these ice sheets retreated as the southern landward margins advanced. This occurred because northern margins became isolated from sources of precipitation as Arctic seas became permanently ice-covered and the advancing southern margin changed atmospheric circulation patterns. In this view, these ice sheets stay about the same size and migrate southward during an ice age. Northern margins rarely reach sea-level during the later stage of the ice age so no marine portions form and ablation is by melting or sublimation. Marine portions formed only when the ice sheets migrated across shallow seas between the High Arctic islands and the mainland. At the end of the ice age, huge amounts of heat had to be transferred from the tropics to the ice sheets in order to account for late-Wisconsin-Weichselian and Holocene retreat-rates by melting along ice-sheet margins. |
format |
Article in Journal/Newspaper |
author |
Fastook, J. L. Sweet, R. Hughes, T. J. |
author_facet |
Fastook, J. L. Sweet, R. Hughes, T. J. |
author_sort |
Fastook, J. L. |
title |
A Closer look at the Proposed Late-Wisconsin-Weichselian Arctic Ice Sheet |
title_short |
A Closer look at the Proposed Late-Wisconsin-Weichselian Arctic Ice Sheet |
title_full |
A Closer look at the Proposed Late-Wisconsin-Weichselian Arctic Ice Sheet |
title_fullStr |
A Closer look at the Proposed Late-Wisconsin-Weichselian Arctic Ice Sheet |
title_full_unstemmed |
A Closer look at the Proposed Late-Wisconsin-Weichselian Arctic Ice Sheet |
title_sort |
closer look at the proposed late-wisconsin-weichselian arctic ice sheet |
publisher |
Cambridge University Press (CUP) |
publishDate |
1979 |
url |
http://dx.doi.org/10.1017/s0022143000015070 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000015070 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice Sheet Journal of Glaciology |
genre_facet |
Arctic Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 24, issue 90, page 497-500 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000015070 |
container_title |
Journal of Glaciology |
container_volume |
24 |
container_issue |
90 |
container_start_page |
497 |
op_container_end_page |
500 |
_version_ |
1792497067141103616 |