Showing a strong link between climatic and pCO2 changes: resolving discrepancies between oceanographic and Antarctic climate records for the Oligocene and early Miocene (34-16 Ma)
Summary 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 comp...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.532.7045 2023-05-15T14:05:12+02:00 Showing a strong link between climatic and pCO2 changes: resolving discrepancies between oceanographic and Antarctic climate records for the Oligocene and early Miocene (34-16 Ma) S. F. Pekar N. Christie-blick The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.7045 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea024.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.7045 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea024.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea024.pdf text ftciteseerx 2016-01-08T10:40:59Z Summary 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. Citiation: Pekar, S.F., N. Christie-Blick (2007), Showing a strong link between climatic and pCO2 changes: resolving discrepancies between Text Antarc* Antarctic Antarctica Ice Sheet Tundra Unknown Antarctic The Antarctic East Antarctic Ice Sheet |
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English |
description |
Summary 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. Citiation: Pekar, S.F., N. Christie-Blick (2007), Showing a strong link between climatic and pCO2 changes: resolving discrepancies between |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
S. F. Pekar N. Christie-blick |
spellingShingle |
S. F. Pekar N. Christie-blick Showing a strong link between climatic and pCO2 changes: resolving discrepancies between oceanographic and Antarctic climate records for the Oligocene and early Miocene (34-16 Ma) |
author_facet |
S. F. Pekar N. Christie-blick |
author_sort |
S. F. Pekar |
title |
Showing a strong link between climatic and pCO2 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 pCO2 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 pCO2 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 pCO2 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 pCO2 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 pco2 changes: resolving discrepancies between oceanographic and antarctic climate records for the oligocene and early miocene (34-16 ma) |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.7045 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea024.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 |
http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea024.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.7045 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea024.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766276925184016384 |