North Atlantic Ice-Rafting: A Major Change at 75,000 Years Before the Present

During the last interglacial-to-glacial climatic cycle [127,000 to 10,000 years before the present (B.P.)], the fundamental geographic shift in the main axis of ice-rafting deposition occurred at 75,000 years B.P. An earlier meridional depositional maximum along the Greenland-Newfoundland coasts was...

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Published in:Science
Main Author: Ruddiman, W. F.
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 1977
Subjects:
Greenland
Newfoundland
North Atlantic
Online Access:http://dx.doi.org/10.1126/science.196.4295.1208
https://www.science.org/doi/pdf/10.1126/science.196.4295.1208
id craaas:10.1126/science.196.4295.1208
record_format openpolar
spelling craaas:10.1126/science.196.4295.1208 2024-09-15T18:09:34+00:00 North Atlantic Ice-Rafting: A Major Change at 75,000 Years Before the Present Ruddiman, W. F. 1977 http://dx.doi.org/10.1126/science.196.4295.1208 https://www.science.org/doi/pdf/10.1126/science.196.4295.1208 en eng American Association for the Advancement of Science (AAAS) Science volume 196, issue 4295, page 1208-1211 ISSN 0036-8075 1095-9203 journal-article 1977 craaas https://doi.org/10.1126/science.196.4295.1208 2024-07-25T04:01:04Z During the last interglacial-to-glacial climatic cycle [127,000 to 10,000 years before the present (B.P.)], the fundamental geographic shift in the main axis of ice-rafting deposition occurred at 75,000 years B.P. An earlier meridional depositional maximum along the Greenland-Newfoundland coasts was superseded by a nearly zonal and much stronger axis some 1500 kilometers to the south along 40°N to 50°N. Both depositional patterns are best explained by cyclonic flow in the subpolar gyre, with the depositional shift related to the retreat of warm, ice-melting North Atlantic drift water from the northwestern half of the gyre. Similar shifts must have characterized preceding interglacial-glacial cycles. Article in Journal/Newspaper Greenland Newfoundland North Atlantic AAAS Resource Center (American Association for the Advancement of Science) Science 196 4295 1208 1211
institution Open Polar
collection AAAS Resource Center (American Association for the Advancement of Science)
op_collection_id craaas
language English
description During the last interglacial-to-glacial climatic cycle [127,000 to 10,000 years before the present (B.P.)], the fundamental geographic shift in the main axis of ice-rafting deposition occurred at 75,000 years B.P. An earlier meridional depositional maximum along the Greenland-Newfoundland coasts was superseded by a nearly zonal and much stronger axis some 1500 kilometers to the south along 40°N to 50°N. Both depositional patterns are best explained by cyclonic flow in the subpolar gyre, with the depositional shift related to the retreat of warm, ice-melting North Atlantic drift water from the northwestern half of the gyre. Similar shifts must have characterized preceding interglacial-glacial cycles.
format Article in Journal/Newspaper
author Ruddiman, W. F.
spellingShingle Ruddiman, W. F.
North Atlantic Ice-Rafting: A Major Change at 75,000 Years Before the Present
author_facet Ruddiman, W. F.
author_sort Ruddiman, W. F.
title North Atlantic Ice-Rafting: A Major Change at 75,000 Years Before the Present
title_short North Atlantic Ice-Rafting: A Major Change at 75,000 Years Before the Present
title_full North Atlantic Ice-Rafting: A Major Change at 75,000 Years Before the Present
title_fullStr North Atlantic Ice-Rafting: A Major Change at 75,000 Years Before the Present
title_full_unstemmed North Atlantic Ice-Rafting: A Major Change at 75,000 Years Before the Present
title_sort north atlantic ice-rafting: a major change at 75,000 years before the present
publisher American Association for the Advancement of Science (AAAS)
publishDate 1977
url http://dx.doi.org/10.1126/science.196.4295.1208
https://www.science.org/doi/pdf/10.1126/science.196.4295.1208
genre Greenland
Newfoundland
North Atlantic
genre_facet Greenland
Newfoundland
North Atlantic
op_source Science
volume 196, issue 4295, page 1208-1211
ISSN 0036-8075 1095-9203
op_doi https://doi.org/10.1126/science.196.4295.1208
container_title Science
container_volume 196
container_issue 4295
container_start_page 1208
op_container_end_page 1211
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