High resolution stable isotope and carbonate variability during the early Oligocene climate
Abstract The rapid global increase in benthic foraminiferal δ18O in the early Oligocene (~33.6 Ma) has been taken to imply the first appearance of large, permanent ice sheets on Antarctica, possibly coupled to deep sea cooling and/or Northern Hemisphere ice growth. This oxygen isotope shift is accom...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.590.2546 2023-05-15T13:53:08+02:00 High resolution stable isotope and carbonate variability during the early Oligocene climate Christina R. Riesselman Robert B. Dunbar David A. Mucciarone Saya S. Kitasei The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.590.2546 http://pubs.usgs.gov/of/2007/1047/srp/srp095/of2007-1047srp095.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.590.2546 http://pubs.usgs.gov/of/2007/1047/srp/srp095/of2007-1047srp095.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.usgs.gov/of/2007/1047/srp/srp095/of2007-1047srp095.pdf text ftciteseerx 2016-01-08T13:29:19Z Abstract The rapid global increase in benthic foraminiferal δ18O in the early Oligocene (~33.6 Ma) has been taken to imply the first appearance of large, permanent ice sheets on Antarctica, possibly coupled to deep sea cooling and/or Northern Hemisphere ice growth. This oxygen isotope shift is accompanied by a reorganization of the global carbon cycle, identified by a δ13C increase that slightly lags the glacially-mediated δ18O transition. Here, we present a new record of the early Oligocene climate transition from the subtropical South Atlantic Ocean. To investigate climatic and carbon cycle variability in the transition from the early Paleogene “greenhouse ” into the Oligocene “icehouse ” world, we have developed carbonate content, coarse fraction, and benthic foraminiferal carbon and oxygen stable isotope records for the earliest Oligocene at Ocean Drilling Program (ODP) Site 1263. These records represent the highest-resolution reconstruction of the Eocene/Oligocene from the Atlantic basin to date, and provide us with a unique opportunity to investigate the fine-scale interplay of glaciation and the global carbon cycle. Text Antarc* Antarctica South Atlantic Ocean Unknown |
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English |
description |
Abstract The rapid global increase in benthic foraminiferal δ18O in the early Oligocene (~33.6 Ma) has been taken to imply the first appearance of large, permanent ice sheets on Antarctica, possibly coupled to deep sea cooling and/or Northern Hemisphere ice growth. This oxygen isotope shift is accompanied by a reorganization of the global carbon cycle, identified by a δ13C increase that slightly lags the glacially-mediated δ18O transition. Here, we present a new record of the early Oligocene climate transition from the subtropical South Atlantic Ocean. To investigate climatic and carbon cycle variability in the transition from the early Paleogene “greenhouse ” into the Oligocene “icehouse ” world, we have developed carbonate content, coarse fraction, and benthic foraminiferal carbon and oxygen stable isotope records for the earliest Oligocene at Ocean Drilling Program (ODP) Site 1263. These records represent the highest-resolution reconstruction of the Eocene/Oligocene from the Atlantic basin to date, and provide us with a unique opportunity to investigate the fine-scale interplay of glaciation and the global carbon cycle. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Christina R. Riesselman Robert B. Dunbar David A. Mucciarone Saya S. Kitasei |
spellingShingle |
Christina R. Riesselman Robert B. Dunbar David A. Mucciarone Saya S. Kitasei High resolution stable isotope and carbonate variability during the early Oligocene climate |
author_facet |
Christina R. Riesselman Robert B. Dunbar David A. Mucciarone Saya S. Kitasei |
author_sort |
Christina R. Riesselman |
title |
High resolution stable isotope and carbonate variability during the early Oligocene climate |
title_short |
High resolution stable isotope and carbonate variability during the early Oligocene climate |
title_full |
High resolution stable isotope and carbonate variability during the early Oligocene climate |
title_fullStr |
High resolution stable isotope and carbonate variability during the early Oligocene climate |
title_full_unstemmed |
High resolution stable isotope and carbonate variability during the early Oligocene climate |
title_sort |
high resolution stable isotope and carbonate variability during the early oligocene climate |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.590.2546 http://pubs.usgs.gov/of/2007/1047/srp/srp095/of2007-1047srp095.pdf |
genre |
Antarc* Antarctica South Atlantic Ocean |
genre_facet |
Antarc* Antarctica South Atlantic Ocean |
op_source |
http://pubs.usgs.gov/of/2007/1047/srp/srp095/of2007-1047srp095.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.590.2546 http://pubs.usgs.gov/of/2007/1047/srp/srp095/of2007-1047srp095.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766258088122253312 |