A coccolithophore concept for constraining the Cenozoic carbon cycle
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>sub>2 ). To date, no direct proxy for past levels of pCO 2 exists beyond the reach of the polar i...
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ftinsu:oai:HAL:hal-00297616v1 2023-11-12T04:18:37+01:00 A coccolithophore concept for constraining the Cenozoic carbon cycle Henderiks, J. Rickaby, R. E. M. Department of Geology and Geochemistry Stockholm Stockholm University Department of Earth Sciences Oxford University of Oxford 2007-06-19 https://hal.science/hal-00297616 https://hal.science/hal-00297616/document https://hal.science/hal-00297616/file/bg-4-323-2007.pdf en eng HAL CCSD European Geosciences Union hal-00297616 https://hal.science/hal-00297616 https://hal.science/hal-00297616/document https://hal.science/hal-00297616/file/bg-4-323-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-00297616 Biogeosciences, 2007, 4 (3), pp.323-329 [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 ftinsu 2023-10-25T16:28:36Z 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>sub>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 a constraint on pCO 2 over the Cenozoic based on the physiological plasticity of extant coccolithophores. 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 evolution of certain 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 Institut national des sciences de l'Univers: HAL-INSU |
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Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
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. A coccolithophore concept for constraining the Cenozoic carbon cycle |
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>sub>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 a constraint on pCO 2 over the Cenozoic based on the physiological plasticity of extant coccolithophores. 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 evolution of certain 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 |
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 |
A coccolithophore concept for constraining the Cenozoic carbon cycle |
title_short |
A coccolithophore concept for constraining the Cenozoic carbon cycle |
title_full |
A coccolithophore concept for constraining the Cenozoic carbon cycle |
title_fullStr |
A coccolithophore concept for constraining the Cenozoic carbon cycle |
title_full_unstemmed |
A coccolithophore concept for constraining the Cenozoic carbon cycle |
title_sort |
coccolithophore concept for constraining the cenozoic carbon cycle |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00297616 https://hal.science/hal-00297616/document https://hal.science/hal-00297616/file/bg-4-323-2007.pdf |
genre |
ice core Ocean acidification |
genre_facet |
ice core Ocean acidification |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-00297616 Biogeosciences, 2007, 4 (3), pp.323-329 |
op_relation |
hal-00297616 https://hal.science/hal-00297616 https://hal.science/hal-00297616/document https://hal.science/hal-00297616/file/bg-4-323-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782335219828785152 |