Showing a strong link between climatic and p CO 2 changes: resolving discrepancies between oceanographic and Antarctic climate records for the Oligocene and early Miocene (34-16 Ma)
An apparent mismatch between published oxygen isotope data and other paleoclimate proxies for the span from 26-16 Ma is resolved by calibration against eustatic estimates obtained from backstripped continental margin stratigraphy. Ice-volume estimates from calibrated oxygen isotope data compare favo...
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ftunivnebraskali:oai:digitalcommons.unl.edu:andrillaffiliates-1016 2023-11-12T04:05:29+01:00 Showing a strong link between climatic and p CO 2 changes: resolving discrepancies between oceanographic and Antarctic climate records for the Oligocene and early Miocene (34-16 Ma) Pekar, Stephan Christie-Blick, N. 2007-01-01T08:00:00Z application/pdf https://digitalcommons.unl.edu/andrillaffiliates/17 https://digitalcommons.unl.edu/context/andrillaffiliates/article/1016/viewcontent/Pekar_AAKCW_2007_Showing_a_strong_link.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/andrillaffiliates/17 https://digitalcommons.unl.edu/context/andrillaffiliates/article/1016/viewcontent/Pekar_AAKCW_2007_Showing_a_strong_link.pdf Related Publications from ANDRILL Affiliates Environmental Indicators and Impact Assessment text 2007 ftunivnebraskali 2023-10-30T10:48:58Z An apparent mismatch between published oxygen isotope data and other paleoclimate proxies for the span from 26-16 Ma is resolved by calibration against eustatic estimates obtained from backstripped continental margin stratigraphy. Ice-volume estimates from calibrated oxygen isotope data compare favorably with stratigraphic and palynological data from Antarctica, and with estimates of atmospheric carbon dioxide for the early Oligocene through early Miocene (34-16 Ma). These isotopic data suggest that the East Antarctic Ice Sheet grew to as much as 30% greater than the present-day ice volume at glacial maxima. This conclusion is corroborated by seismic reflection and stratigraphic data from the Antarctic margin that suggest that the ice sheet may have covered much of the continental shelf at Oligocene and early Miocene glacial maxima. Palynological data suggest long-term cooling during the Oligocene, with near tundra environments developing along the coast at glacial minima by the late Oligocene. Text Antarc* Antarctic Antarctica Ice Sheet Tundra University of Nebraska-Lincoln: DigitalCommons@UNL Antarctic The Antarctic East Antarctic Ice Sheet |
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University of Nebraska-Lincoln: DigitalCommons@UNL |
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topic |
Environmental Indicators and Impact Assessment |
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Environmental Indicators and Impact Assessment Pekar, Stephan Christie-Blick, N. Showing a strong link between climatic and p CO 2 changes: resolving discrepancies between oceanographic and Antarctic climate records for the Oligocene and early Miocene (34-16 Ma) |
topic_facet |
Environmental Indicators and Impact Assessment |
description |
An apparent mismatch between published oxygen isotope data and other paleoclimate proxies for the span from 26-16 Ma is resolved by calibration against eustatic estimates obtained from backstripped continental margin stratigraphy. Ice-volume estimates from calibrated oxygen isotope data compare favorably with stratigraphic and palynological data from Antarctica, and with estimates of atmospheric carbon dioxide for the early Oligocene through early Miocene (34-16 Ma). These isotopic data suggest that the East Antarctic Ice Sheet grew to as much as 30% greater than the present-day ice volume at glacial maxima. This conclusion is corroborated by seismic reflection and stratigraphic data from the Antarctic margin that suggest that the ice sheet may have covered much of the continental shelf at Oligocene and early Miocene glacial maxima. Palynological data suggest long-term cooling during the Oligocene, with near tundra environments developing along the coast at glacial minima by the late Oligocene. |
format |
Text |
author |
Pekar, Stephan Christie-Blick, N. |
author_facet |
Pekar, Stephan Christie-Blick, N. |
author_sort |
Pekar, Stephan |
title |
Showing a strong link between climatic and p CO 2 changes: resolving discrepancies between oceanographic and Antarctic climate records for the Oligocene and early Miocene (34-16 Ma) |
title_short |
Showing a strong link between climatic and p CO 2 changes: resolving discrepancies between oceanographic and Antarctic climate records for the Oligocene and early Miocene (34-16 Ma) |
title_full |
Showing a strong link between climatic and p CO 2 changes: resolving discrepancies between oceanographic and Antarctic climate records for the Oligocene and early Miocene (34-16 Ma) |
title_fullStr |
Showing a strong link between climatic and p CO 2 changes: resolving discrepancies between oceanographic and Antarctic climate records for the Oligocene and early Miocene (34-16 Ma) |
title_full_unstemmed |
Showing a strong link between climatic and p CO 2 changes: resolving discrepancies between oceanographic and Antarctic climate records for the Oligocene and early Miocene (34-16 Ma) |
title_sort |
showing a strong link between climatic and p co 2 changes: resolving discrepancies between oceanographic and antarctic climate records for the oligocene and early miocene (34-16 ma) |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2007 |
url |
https://digitalcommons.unl.edu/andrillaffiliates/17 https://digitalcommons.unl.edu/context/andrillaffiliates/article/1016/viewcontent/Pekar_AAKCW_2007_Showing_a_strong_link.pdf |
geographic |
Antarctic The Antarctic East Antarctic Ice Sheet |
geographic_facet |
Antarctic The Antarctic East Antarctic Ice Sheet |
genre |
Antarc* Antarctic Antarctica Ice Sheet Tundra |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Tundra |
op_source |
Related Publications from ANDRILL Affiliates |
op_relation |
https://digitalcommons.unl.edu/andrillaffiliates/17 https://digitalcommons.unl.edu/context/andrillaffiliates/article/1016/viewcontent/Pekar_AAKCW_2007_Showing_a_strong_link.pdf |
_version_ |
1782342008381112320 |