Isotopic evidence for glaciation during the Cretaceous supergreenhouse
The Turonian (93.5 to 89.3 million years ago) was one of the warmest periods of the Phanerozoic eon, with tropical sea surface temperatures over 35°C. High-amplitude sea-level changes and positive 18O excursions in marine limestones suggest that glaciation events may have punctuated this episode of...
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ftsouthampton:oai:eprints.soton.ac.uk:50052 2023-07-30T03:57:35+02:00 Isotopic evidence for glaciation during the Cretaceous supergreenhouse Bornemann, André Norris, Richard D. Friedrich, Oliver Beckmann, Britta Schouten, Stefan Sinninghe Damste, Jaap S. Vogel, Jennifer Hofmann, Peter Wagner, Thomas 2008-01-11 https://eprints.soton.ac.uk/50052/ unknown Bornemann, André, Norris, Richard D., Friedrich, Oliver, Beckmann, Britta, Schouten, Stefan, Sinninghe Damste, Jaap S., Vogel, Jennifer, Hofmann, Peter and Wagner, Thomas (2008) Isotopic evidence for glaciation during the Cretaceous supergreenhouse. Science, 319 (5860), 189-192. (doi:10.1126/science.1148777 <http://dx.doi.org/10.1126/science.1148777>). Article PeerReviewed 2008 ftsouthampton https://doi.org/10.1126/science.1148777 2023-07-09T20:54:33Z The Turonian (93.5 to 89.3 million years ago) was one of the warmest periods of the Phanerozoic eon, with tropical sea surface temperatures over 35°C. High-amplitude sea-level changes and positive 18O excursions in marine limestones suggest that glaciation events may have punctuated this episode of extreme warmth. New 18O data from the tropical Atlantic show synchronous shifts 91.2 million years ago for both the surface and deep ocean that are consistent with an approximately 200,000-year period of glaciation, with ice sheets of about half the size of the modern Antarctic ice cap. Even the prevailing supergreenhouse climate was not a barrier to the formation of large ice sheets, calling into question the common assumption that the poles were always ice-free during past periods of intense global warming. Article in Journal/Newspaper Antarc* Antarctic Ice cap University of Southampton: e-Prints Soton Antarctic Science 319 5860 189 192 |
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Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
The Turonian (93.5 to 89.3 million years ago) was one of the warmest periods of the Phanerozoic eon, with tropical sea surface temperatures over 35°C. High-amplitude sea-level changes and positive 18O excursions in marine limestones suggest that glaciation events may have punctuated this episode of extreme warmth. New 18O data from the tropical Atlantic show synchronous shifts 91.2 million years ago for both the surface and deep ocean that are consistent with an approximately 200,000-year period of glaciation, with ice sheets of about half the size of the modern Antarctic ice cap. Even the prevailing supergreenhouse climate was not a barrier to the formation of large ice sheets, calling into question the common assumption that the poles were always ice-free during past periods of intense global warming. |
format |
Article in Journal/Newspaper |
author |
Bornemann, André Norris, Richard D. Friedrich, Oliver Beckmann, Britta Schouten, Stefan Sinninghe Damste, Jaap S. Vogel, Jennifer Hofmann, Peter Wagner, Thomas |
spellingShingle |
Bornemann, André Norris, Richard D. Friedrich, Oliver Beckmann, Britta Schouten, Stefan Sinninghe Damste, Jaap S. Vogel, Jennifer Hofmann, Peter Wagner, Thomas Isotopic evidence for glaciation during the Cretaceous supergreenhouse |
author_facet |
Bornemann, André Norris, Richard D. Friedrich, Oliver Beckmann, Britta Schouten, Stefan Sinninghe Damste, Jaap S. Vogel, Jennifer Hofmann, Peter Wagner, Thomas |
author_sort |
Bornemann, André |
title |
Isotopic evidence for glaciation during the Cretaceous supergreenhouse |
title_short |
Isotopic evidence for glaciation during the Cretaceous supergreenhouse |
title_full |
Isotopic evidence for glaciation during the Cretaceous supergreenhouse |
title_fullStr |
Isotopic evidence for glaciation during the Cretaceous supergreenhouse |
title_full_unstemmed |
Isotopic evidence for glaciation during the Cretaceous supergreenhouse |
title_sort |
isotopic evidence for glaciation during the cretaceous supergreenhouse |
publishDate |
2008 |
url |
https://eprints.soton.ac.uk/50052/ |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Ice cap |
genre_facet |
Antarc* Antarctic Ice cap |
op_relation |
Bornemann, André, Norris, Richard D., Friedrich, Oliver, Beckmann, Britta, Schouten, Stefan, Sinninghe Damste, Jaap S., Vogel, Jennifer, Hofmann, Peter and Wagner, Thomas (2008) Isotopic evidence for glaciation during the Cretaceous supergreenhouse. Science, 319 (5860), 189-192. (doi:10.1126/science.1148777 <http://dx.doi.org/10.1126/science.1148777>). |
op_doi |
https://doi.org/10.1126/science.1148777 |
container_title |
Science |
container_volume |
319 |
container_issue |
5860 |
container_start_page |
189 |
op_container_end_page |
192 |
_version_ |
1772818171828371456 |