Northern Hemisphere climate régimes during the past 3 Ma: possible tectonic connections
The 100 ka rhythm of orbital eccentricity has dominated large-amplitude climatic variations in the high-latitude North Atlantic during the Brunhes magnetic chron (0-0.735 Ma BP ). Earlier, during the Matuyama chron (0.735-2.47 Ma BP), climatic variations in this region were lower in amplitude and co...
Published in: | Philosophical Transactions of the Royal Society of London. B, Biological Sciences |
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Language: | English |
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Online Access: | http://dx.doi.org/10.1098/rstb.1988.0017 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1988.0017 |
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crroyalsociety:10.1098/rstb.1988.0017 2024-06-23T07:53:46+00:00 Northern Hemisphere climate régimes during the past 3 Ma: possible tectonic connections 1988 http://dx.doi.org/10.1098/rstb.1988.0017 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1988.0017 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society of London. B, Biological Sciences volume 318, issue 1191, page 411-430 ISSN 0080-4622 2054-0280 journal-article 1988 crroyalsociety https://doi.org/10.1098/rstb.1988.0017 2024-06-10T04:15:15Z The 100 ka rhythm of orbital eccentricity has dominated large-amplitude climatic variations in the high-latitude North Atlantic during the Brunhes magnetic chron (0-0.735 Ma BP ). Earlier, during the Matuyama chron (0.735-2.47 Ma BP), climatic variations in this region were lower in amplitude and concentrated mainly at the 41 ka rhythm of orbital obliquity. These rhythmic climatic responses to orbital forcing are evident both in stable isotopic (δ 18 O) indicators of ice volume or temperature and in biotic and lithologic indicators of local North Atlantic surface-ocean variability. The synchronous responses of these indicators are consistent with results from atmospheric general circulation models showing that the North American ice sheet directly controls North Atlantic surface-ocean responses via strong cold winds that are generated on the northern ice-sheet flanks and blow out across the ocean, chilling its surface. Before 2.47 Ma BP , smaller-scale quasiperiodic oscillations of the planktonic fauna and flora occurred, but the cause of these variations in the absence of significant ice sheets is unclear. Article in Journal/Newspaper Ice Sheet North Atlantic The Royal Society Philosophical Transactions of the Royal Society of London. B, Biological Sciences 318 1191 411 430 |
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Open Polar |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
The 100 ka rhythm of orbital eccentricity has dominated large-amplitude climatic variations in the high-latitude North Atlantic during the Brunhes magnetic chron (0-0.735 Ma BP ). Earlier, during the Matuyama chron (0.735-2.47 Ma BP), climatic variations in this region were lower in amplitude and concentrated mainly at the 41 ka rhythm of orbital obliquity. These rhythmic climatic responses to orbital forcing are evident both in stable isotopic (δ 18 O) indicators of ice volume or temperature and in biotic and lithologic indicators of local North Atlantic surface-ocean variability. The synchronous responses of these indicators are consistent with results from atmospheric general circulation models showing that the North American ice sheet directly controls North Atlantic surface-ocean responses via strong cold winds that are generated on the northern ice-sheet flanks and blow out across the ocean, chilling its surface. Before 2.47 Ma BP , smaller-scale quasiperiodic oscillations of the planktonic fauna and flora occurred, but the cause of these variations in the absence of significant ice sheets is unclear. |
format |
Article in Journal/Newspaper |
title |
Northern Hemisphere climate régimes during the past 3 Ma: possible tectonic connections |
spellingShingle |
Northern Hemisphere climate régimes during the past 3 Ma: possible tectonic connections |
title_short |
Northern Hemisphere climate régimes during the past 3 Ma: possible tectonic connections |
title_full |
Northern Hemisphere climate régimes during the past 3 Ma: possible tectonic connections |
title_fullStr |
Northern Hemisphere climate régimes during the past 3 Ma: possible tectonic connections |
title_full_unstemmed |
Northern Hemisphere climate régimes during the past 3 Ma: possible tectonic connections |
title_sort |
northern hemisphere climate régimes during the past 3 ma: possible tectonic connections |
publisher |
The Royal Society |
publishDate |
1988 |
url |
http://dx.doi.org/10.1098/rstb.1988.0017 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1988.0017 |
genre |
Ice Sheet North Atlantic |
genre_facet |
Ice Sheet North Atlantic |
op_source |
Philosophical Transactions of the Royal Society of London. B, Biological Sciences volume 318, issue 1191, page 411-430 ISSN 0080-4622 2054-0280 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rstb.1988.0017 |
container_title |
Philosophical Transactions of the Royal Society of London. B, Biological Sciences |
container_volume |
318 |
container_issue |
1191 |
container_start_page |
411 |
op_container_end_page |
430 |
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1802645594982842368 |