Algal constraints on the Cenozoic history of atmospheric CO 2 ?
International audience An urgent question for future climate, in light of increased burning of fossil fuels, is the temperature sensitivity of the climate system to atmospheric carbon dioxide (pCO 2 ). To date, no direct proxy for past levels of pCO 2 exists beyond the reach of the polar ice core re...
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ftunivnantes:oai:HAL:hal-00297858v1 2023-05-15T16:39:10+02:00 Algal constraints on the Cenozoic history of atmospheric CO 2 ? Henderiks, J. Rickaby, R. E. M. Department of Geology and Geochemistry Stockholm Stockholm University Department of Earth Sciences Oxford University of Oxford Oxford 2007-01-16 https://hal.archives-ouvertes.fr/hal-00297858 https://hal.archives-ouvertes.fr/hal-00297858/document https://hal.archives-ouvertes.fr/hal-00297858/file/bgd-4-1-2007.pdf en eng HAL CCSD European Geosciences Union hal-00297858 https://hal.archives-ouvertes.fr/hal-00297858 https://hal.archives-ouvertes.fr/hal-00297858/document https://hal.archives-ouvertes.fr/hal-00297858/file/bgd-4-1-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 1810-6277 EISSN: 1810-6285 Biogeosciences Discussions https://hal.archives-ouvertes.fr/hal-00297858 Biogeosciences Discussions, European Geosciences Union, 2007, 4 (1), pp.1-11 [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2007 ftunivnantes 2022-09-06T23:38:26Z International audience An urgent question for future climate, in light of increased burning of fossil fuels, is the temperature sensitivity of the climate system to atmospheric carbon dioxide (pCO 2 ). To date, no direct proxy for past levels of pCO 2 exists beyond the reach of the polar ice core records. We propose a new methodology for placing an upper constraint on pCO 2 over the Cenozoic based on the living geological record. Specifically, our premise is that the contrasting calcification tolerance of various extant species of coccolithophore to raised pCO 2 reflects an "evolutionary memory" of past atmospheric composition. The different times of first emergence of each morphospecies allows an upper constraint of past pCO 2 to be placed on Cenozoic timeslices. Further, our hypothesis has implications for the response of marine calcifiers to ocean acidification. Geologically "ancient" species, which have survived large changes in ocean chemistry, are likely more resilient to predicted acidification. Article in Journal/Newspaper ice core Ocean acidification Université de Nantes: HAL-UNIV-NANTES |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Henderiks, J. Rickaby, R. E. M. Algal constraints on the Cenozoic history of atmospheric CO 2 ? |
topic_facet |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience An urgent question for future climate, in light of increased burning of fossil fuels, is the temperature sensitivity of the climate system to atmospheric carbon dioxide (pCO 2 ). To date, no direct proxy for past levels of pCO 2 exists beyond the reach of the polar ice core records. We propose a new methodology for placing an upper constraint on pCO 2 over the Cenozoic based on the living geological record. Specifically, our premise is that the contrasting calcification tolerance of various extant species of coccolithophore to raised pCO 2 reflects an "evolutionary memory" of past atmospheric composition. The different times of first emergence of each morphospecies allows an upper constraint of past pCO 2 to be placed on Cenozoic timeslices. Further, our hypothesis has implications for the response of marine calcifiers to ocean acidification. Geologically "ancient" species, which have survived large changes in ocean chemistry, are likely more resilient to predicted acidification. |
author2 |
Department of Geology and Geochemistry Stockholm Stockholm University Department of Earth Sciences Oxford University of Oxford Oxford |
format |
Article in Journal/Newspaper |
author |
Henderiks, J. Rickaby, R. E. M. |
author_facet |
Henderiks, J. Rickaby, R. E. M. |
author_sort |
Henderiks, J. |
title |
Algal constraints on the Cenozoic history of atmospheric CO 2 ? |
title_short |
Algal constraints on the Cenozoic history of atmospheric CO 2 ? |
title_full |
Algal constraints on the Cenozoic history of atmospheric CO 2 ? |
title_fullStr |
Algal constraints on the Cenozoic history of atmospheric CO 2 ? |
title_full_unstemmed |
Algal constraints on the Cenozoic history of atmospheric CO 2 ? |
title_sort |
algal constraints on the cenozoic history of atmospheric co 2 ? |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.archives-ouvertes.fr/hal-00297858 https://hal.archives-ouvertes.fr/hal-00297858/document https://hal.archives-ouvertes.fr/hal-00297858/file/bgd-4-1-2007.pdf |
genre |
ice core Ocean acidification |
genre_facet |
ice core Ocean acidification |
op_source |
ISSN: 1810-6277 EISSN: 1810-6285 Biogeosciences Discussions https://hal.archives-ouvertes.fr/hal-00297858 Biogeosciences Discussions, European Geosciences Union, 2007, 4 (1), pp.1-11 |
op_relation |
hal-00297858 https://hal.archives-ouvertes.fr/hal-00297858 https://hal.archives-ouvertes.fr/hal-00297858/document https://hal.archives-ouvertes.fr/hal-00297858/file/bgd-4-1-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766029502171840512 |