Oceanic Evidence for the Mechanism of Rapid Northern Hemisphere Glaciation
Abstract The oxygen isotopic stage 5/4 boundary in deep-sea sediments marks a prominent interval of northern hemisphere ice-sheet growth that lasted about 10,000 yr. During much of this rapid ice growth, the North Atlantic Ocean from at least 40°N to 60°N maintained warm sea-surface temperatures, wi...
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Cambridge University Press (CUP)
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crcambridgeupr:10.1016/0033-5894(80)90081-2 2024-09-09T19:45:05+00:00 Oceanic Evidence for the Mechanism of Rapid Northern Hemisphere Glaciation Ruddiman, W. F. McIntyre, A. Niebler-Hunt, V. Durazzi, J. T. 1980 http://dx.doi.org/10.1016/0033-5894(80)90081-2 http://api.elsevier.com/content/article/PII:0033589480900812?httpAccept=text/xml http://api.elsevier.com/content/article/PII:0033589480900812?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400015246 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 13, issue 1, page 33-64 ISSN 0033-5894 1096-0287 journal-article 1980 crcambridgeupr https://doi.org/10.1016/0033-5894(80)90081-2 2024-07-24T04:03:23Z Abstract The oxygen isotopic stage 5/4 boundary in deep-sea sediments marks a prominent interval of northern hemisphere ice-sheet growth that lasted about 10,000 yr. During much of this rapid ice growth, the North Atlantic Ocean from at least 40°N to 60°N maintained warm sea-surface temperatures, within 1° to 2°C of today's subpolar ocean. This oceanic warmth provided a local source of moisture for ice-sheet accretion on the adjacent continents. The unusually strong thermal gradient off the east coast of North America (an “interglacial” ocean alongside a “glacial” land mass) also should have directed low-pressure storms from warm southern latitudes north-ward toward the Laurentide Ice Sheet. In addition, minimal calving of ice into the North Atlantic occurred during most of the stage 5/4 transition, indicative of ice retention within the continents. Diminished summer and autumn insolation, a warm subpolar ocean, and minimal calving of ice are conducive to rapid and extensive episodes of northern hemisphere ice-sheet growth. Article in Journal/Newspaper Ice Sheet North Atlantic Cambridge University Press Quaternary Research 13 1 33 64 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
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English |
description |
Abstract The oxygen isotopic stage 5/4 boundary in deep-sea sediments marks a prominent interval of northern hemisphere ice-sheet growth that lasted about 10,000 yr. During much of this rapid ice growth, the North Atlantic Ocean from at least 40°N to 60°N maintained warm sea-surface temperatures, within 1° to 2°C of today's subpolar ocean. This oceanic warmth provided a local source of moisture for ice-sheet accretion on the adjacent continents. The unusually strong thermal gradient off the east coast of North America (an “interglacial” ocean alongside a “glacial” land mass) also should have directed low-pressure storms from warm southern latitudes north-ward toward the Laurentide Ice Sheet. In addition, minimal calving of ice into the North Atlantic occurred during most of the stage 5/4 transition, indicative of ice retention within the continents. Diminished summer and autumn insolation, a warm subpolar ocean, and minimal calving of ice are conducive to rapid and extensive episodes of northern hemisphere ice-sheet growth. |
format |
Article in Journal/Newspaper |
author |
Ruddiman, W. F. McIntyre, A. Niebler-Hunt, V. Durazzi, J. T. |
spellingShingle |
Ruddiman, W. F. McIntyre, A. Niebler-Hunt, V. Durazzi, J. T. Oceanic Evidence for the Mechanism of Rapid Northern Hemisphere Glaciation |
author_facet |
Ruddiman, W. F. McIntyre, A. Niebler-Hunt, V. Durazzi, J. T. |
author_sort |
Ruddiman, W. F. |
title |
Oceanic Evidence for the Mechanism of Rapid Northern Hemisphere Glaciation |
title_short |
Oceanic Evidence for the Mechanism of Rapid Northern Hemisphere Glaciation |
title_full |
Oceanic Evidence for the Mechanism of Rapid Northern Hemisphere Glaciation |
title_fullStr |
Oceanic Evidence for the Mechanism of Rapid Northern Hemisphere Glaciation |
title_full_unstemmed |
Oceanic Evidence for the Mechanism of Rapid Northern Hemisphere Glaciation |
title_sort |
oceanic evidence for the mechanism of rapid northern hemisphere glaciation |
publisher |
Cambridge University Press (CUP) |
publishDate |
1980 |
url |
http://dx.doi.org/10.1016/0033-5894(80)90081-2 http://api.elsevier.com/content/article/PII:0033589480900812?httpAccept=text/xml http://api.elsevier.com/content/article/PII:0033589480900812?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400015246 |
genre |
Ice Sheet North Atlantic |
genre_facet |
Ice Sheet North Atlantic |
op_source |
Quaternary Research volume 13, issue 1, page 33-64 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/0033-5894(80)90081-2 |
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Quaternary Research |
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13 |
container_issue |
1 |
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33 |
op_container_end_page |
64 |
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1809914714412548096 |