Terrestrial cooling in Northern Europe during the Eocene–Oligocene transition
Geochemical and modeling studies suggest that the transition from the “greenhouse” state of the Late Eocene to the “icehouse” conditions of the Oligocene 34–33.5 Ma was triggered by a reduction of atmospheric pCO2 that enabled the rapid buildup of a permanent ice sheet on the Antarctic continent. Ma...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3651463 http://www.ncbi.nlm.nih.gov/pubmed/23610424 https://doi.org/10.1073/pnas.1210930110 |
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ftpubmed:oai:pubmedcentral.nih.gov:3651463 2023-05-15T13:53:16+02:00 Terrestrial cooling in Northern Europe during the Eocene–Oligocene transition Hren, Michael T. Sheldon, Nathan D. Grimes, Stephen T. Collinson, Margaret E. Hooker, Jerry J. Bugler, Melanie Lohmann, Kyger C. 2013-05-07 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3651463 http://www.ncbi.nlm.nih.gov/pubmed/23610424 https://doi.org/10.1073/pnas.1210930110 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3651463 http://www.ncbi.nlm.nih.gov/pubmed/23610424 http://dx.doi.org/10.1073/pnas.1210930110 Physical Sciences Text 2013 ftpubmed https://doi.org/10.1073/pnas.1210930110 2013-11-10T01:25:00Z Geochemical and modeling studies suggest that the transition from the “greenhouse” state of the Late Eocene to the “icehouse” conditions of the Oligocene 34–33.5 Ma was triggered by a reduction of atmospheric pCO2 that enabled the rapid buildup of a permanent ice sheet on the Antarctic continent. Marine records show that the drop in pCO2 during this interval was accompanied by a significant decline in high-latitude sea surface and deep ocean temperature and enhanced seasonality in middle and high latitudes. However, terrestrial records of this climate transition show heterogeneous responses to changing pCO2 and ocean temperatures, with some records showing a significant time lag in the temperature response to declining pCO2. We measured the Δ47 of aragonite shells of the freshwater gastropod Viviparus lentus from the Solent Group, Hampshire Basin, United Kingdom, to reconstruct terrestrial temperature and hydrologic change in the North Atlantic region during the Eocene–Oligocene transition. Our data show a decrease in growing-season surface water temperatures (∼10 °C) during the Eocene–Oligocene transition, corresponding to an average decrease in mean annual air temperature of ∼4–6 °C from the Late Eocene to Early Oligocene. The magnitude of cooling is similar to observed decreases in North Atlantic sea surface temperature over this interval and occurs during major glacial expansion. This suggests a close linkage between atmospheric carbon dioxide concentrations, Northern Hemisphere temperature, and expansion of the Antarctic ice sheets. Text Antarc* Antarctic Ice Sheet North Atlantic PubMed Central (PMC) Antarctic The Antarctic Proceedings of the National Academy of Sciences 110 19 7562 7567 |
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English |
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Physical Sciences |
spellingShingle |
Physical Sciences Hren, Michael T. Sheldon, Nathan D. Grimes, Stephen T. Collinson, Margaret E. Hooker, Jerry J. Bugler, Melanie Lohmann, Kyger C. Terrestrial cooling in Northern Europe during the Eocene–Oligocene transition |
topic_facet |
Physical Sciences |
description |
Geochemical and modeling studies suggest that the transition from the “greenhouse” state of the Late Eocene to the “icehouse” conditions of the Oligocene 34–33.5 Ma was triggered by a reduction of atmospheric pCO2 that enabled the rapid buildup of a permanent ice sheet on the Antarctic continent. Marine records show that the drop in pCO2 during this interval was accompanied by a significant decline in high-latitude sea surface and deep ocean temperature and enhanced seasonality in middle and high latitudes. However, terrestrial records of this climate transition show heterogeneous responses to changing pCO2 and ocean temperatures, with some records showing a significant time lag in the temperature response to declining pCO2. We measured the Δ47 of aragonite shells of the freshwater gastropod Viviparus lentus from the Solent Group, Hampshire Basin, United Kingdom, to reconstruct terrestrial temperature and hydrologic change in the North Atlantic region during the Eocene–Oligocene transition. Our data show a decrease in growing-season surface water temperatures (∼10 °C) during the Eocene–Oligocene transition, corresponding to an average decrease in mean annual air temperature of ∼4–6 °C from the Late Eocene to Early Oligocene. The magnitude of cooling is similar to observed decreases in North Atlantic sea surface temperature over this interval and occurs during major glacial expansion. This suggests a close linkage between atmospheric carbon dioxide concentrations, Northern Hemisphere temperature, and expansion of the Antarctic ice sheets. |
format |
Text |
author |
Hren, Michael T. Sheldon, Nathan D. Grimes, Stephen T. Collinson, Margaret E. Hooker, Jerry J. Bugler, Melanie Lohmann, Kyger C. |
author_facet |
Hren, Michael T. Sheldon, Nathan D. Grimes, Stephen T. Collinson, Margaret E. Hooker, Jerry J. Bugler, Melanie Lohmann, Kyger C. |
author_sort |
Hren, Michael T. |
title |
Terrestrial cooling in Northern Europe during the Eocene–Oligocene transition |
title_short |
Terrestrial cooling in Northern Europe during the Eocene–Oligocene transition |
title_full |
Terrestrial cooling in Northern Europe during the Eocene–Oligocene transition |
title_fullStr |
Terrestrial cooling in Northern Europe during the Eocene–Oligocene transition |
title_full_unstemmed |
Terrestrial cooling in Northern Europe during the Eocene–Oligocene transition |
title_sort |
terrestrial cooling in northern europe during the eocene–oligocene transition |
publisher |
National Academy of Sciences |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3651463 http://www.ncbi.nlm.nih.gov/pubmed/23610424 https://doi.org/10.1073/pnas.1210930110 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet North Atlantic |
genre_facet |
Antarc* Antarctic Ice Sheet North Atlantic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3651463 http://www.ncbi.nlm.nih.gov/pubmed/23610424 http://dx.doi.org/10.1073/pnas.1210930110 |
op_doi |
https://doi.org/10.1073/pnas.1210930110 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
110 |
container_issue |
19 |
container_start_page |
7562 |
op_container_end_page |
7567 |
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1766258305811873792 |