Atmospheric CO2estimates for the Miocene to Pleistocene based on foraminiferal δ11B at Ocean Drilling Program Sites 806 and 807 in the Western Equatorial Pacific
International audience Abstract. Constraints on the evolution of atmospheric CO2 levels throughout Earth's history are foundational to our understanding of past variations in climate. Despite considerable effort, records vary in their temporal and spatial coverage and estimates of past CO2 leve...
Published in: | Climate of the Past |
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Main Authors: | , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2022
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Online Access: | https://hal.univ-brest.fr/hal-03602644 https://hal.univ-brest.fr/hal-03602644/document https://hal.univ-brest.fr/hal-03602644/file/Atmospheric-COsub2subestimates-for-the-Miocene-to-Pleistocene-based-on-foraminiferal-11B-at-Ocean-Drilling-Program-Sites-806-and-807-in-the-Western-Equatorial-PacificClimate-of-the-Past.pdf https://doi.org/10.5194/cp-18-183-2022 |
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ftccsdartic:oai:HAL:hal-03602644v1 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Ocean Drilling Program Miocene foraminifera estimation method carbon dioxide atmospheric dynamics Pleistocene [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE]Environmental Sciences |
spellingShingle |
Ocean Drilling Program Miocene foraminifera estimation method carbon dioxide atmospheric dynamics Pleistocene [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE]Environmental Sciences Guillermic, Maxence Misra, Sambuddha Eagle, Robert Tripati, Aradhna Atmospheric CO2estimates for the Miocene to Pleistocene based on foraminiferal δ11B at Ocean Drilling Program Sites 806 and 807 in the Western Equatorial Pacific |
topic_facet |
Ocean Drilling Program Miocene foraminifera estimation method carbon dioxide atmospheric dynamics Pleistocene [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE]Environmental Sciences |
description |
International audience Abstract. Constraints on the evolution of atmospheric CO2 levels throughout Earth's history are foundational to our understanding of past variations in climate. Despite considerable effort, records vary in their temporal and spatial coverage and estimates of past CO2 levels do not always converge, and therefore new records and proxies are valuable. Here we reconstruct atmospheric CO2 values across major climate transitions over the past 16 million years using the boron isotopic composition (δ11B) of planktic foraminifera from 89 samples obtained from two sites in the West Pacific Warm Pool, Ocean Drilling Program (ODP) Sites 806 and 807, measured using high-precision multi-collector inductively coupled plasma mass spectrometry. We compare our results to published data from ODP Site 872, also in the Western Equatorial Pacific, that goes back to 22 million years ago. These sites are in a region that today is near equilibrium with the atmosphere and are thought to have been in equilibrium with the atmosphere for the interval studied. We show that δ11B data from this region are consistent with other boron-based studies. The data show evidence for elevated pCO2 during the Middle Miocene and Early to Middle Pliocene, and reductions in pCO2 of ∼200 ppm during the Middle Miocene Climate Transition, ∼250 ppm during Pliocene Glacial Intensification and ∼50 ppm during the Mid-Pleistocene Climate Transition. During the Mid-Pleistocene Transition there is a minimum pCO2 at marine isotopic stage (MIS) 30. Our results are consistent with a coupling between pCO2, temperature and ice sheet expansion from the Miocene to the late Quaternary. |
author2 |
Geo-Ocean (GEO-OCEAN) Université de Bretagne Sud (UBS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Department of Atmospheric and Oceanic Sciences Los Angeles (AOS) University of California Los Angeles (UCLA) University of California (UC)-University of California (UC) Department of Earth Sciences Cambridge, UK University of Cambridge UK (CAM) ANR-10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010) |
format |
Article in Journal/Newspaper |
author |
Guillermic, Maxence Misra, Sambuddha Eagle, Robert Tripati, Aradhna |
author_facet |
Guillermic, Maxence Misra, Sambuddha Eagle, Robert Tripati, Aradhna |
author_sort |
Guillermic, Maxence |
title |
Atmospheric CO2estimates for the Miocene to Pleistocene based on foraminiferal δ11B at Ocean Drilling Program Sites 806 and 807 in the Western Equatorial Pacific |
title_short |
Atmospheric CO2estimates for the Miocene to Pleistocene based on foraminiferal δ11B at Ocean Drilling Program Sites 806 and 807 in the Western Equatorial Pacific |
title_full |
Atmospheric CO2estimates for the Miocene to Pleistocene based on foraminiferal δ11B at Ocean Drilling Program Sites 806 and 807 in the Western Equatorial Pacific |
title_fullStr |
Atmospheric CO2estimates for the Miocene to Pleistocene based on foraminiferal δ11B at Ocean Drilling Program Sites 806 and 807 in the Western Equatorial Pacific |
title_full_unstemmed |
Atmospheric CO2estimates for the Miocene to Pleistocene based on foraminiferal δ11B at Ocean Drilling Program Sites 806 and 807 in the Western Equatorial Pacific |
title_sort |
atmospheric co2estimates for the miocene to pleistocene based on foraminiferal δ11b at ocean drilling program sites 806 and 807 in the western equatorial pacific |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.univ-brest.fr/hal-03602644 https://hal.univ-brest.fr/hal-03602644/document https://hal.univ-brest.fr/hal-03602644/file/Atmospheric-COsub2subestimates-for-the-Miocene-to-Pleistocene-based-on-foraminiferal-11B-at-Ocean-Drilling-Program-Sites-806-and-807-in-the-Western-Equatorial-PacificClimate-of-the-Past.pdf https://doi.org/10.5194/cp-18-183-2022 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.univ-brest.fr/hal-03602644 Climate of the Past, 2022, 18 (2), pp.183-207. ⟨10.5194/cp-18-183-2022⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-18-183-2022 hal-03602644 https://hal.univ-brest.fr/hal-03602644 https://hal.univ-brest.fr/hal-03602644/document https://hal.univ-brest.fr/hal-03602644/file/Atmospheric-COsub2subestimates-for-the-Miocene-to-Pleistocene-based-on-foraminiferal-11B-at-Ocean-Drilling-Program-Sites-806-and-807-in-the-Western-Equatorial-PacificClimate-of-the-Past.pdf doi:10.5194/cp-18-183-2022 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-18-183-2022 |
container_title |
Climate of the Past |
container_volume |
18 |
container_issue |
2 |
container_start_page |
183 |
op_container_end_page |
207 |
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1785585231117418496 |
spelling |
ftccsdartic:oai:HAL:hal-03602644v1 2023-12-17T10:31:49+01:00 Atmospheric CO2estimates for the Miocene to Pleistocene based on foraminiferal δ11B at Ocean Drilling Program Sites 806 and 807 in the Western Equatorial Pacific Guillermic, Maxence Misra, Sambuddha Eagle, Robert Tripati, Aradhna Geo-Ocean (GEO-OCEAN) Université de Bretagne Sud (UBS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Department of Atmospheric and Oceanic Sciences Los Angeles (AOS) University of California Los Angeles (UCLA) University of California (UC)-University of California (UC) Department of Earth Sciences Cambridge, UK University of Cambridge UK (CAM) ANR-10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010) 2022 https://hal.univ-brest.fr/hal-03602644 https://hal.univ-brest.fr/hal-03602644/document https://hal.univ-brest.fr/hal-03602644/file/Atmospheric-COsub2subestimates-for-the-Miocene-to-Pleistocene-based-on-foraminiferal-11B-at-Ocean-Drilling-Program-Sites-806-and-807-in-the-Western-Equatorial-PacificClimate-of-the-Past.pdf https://doi.org/10.5194/cp-18-183-2022 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-18-183-2022 hal-03602644 https://hal.univ-brest.fr/hal-03602644 https://hal.univ-brest.fr/hal-03602644/document https://hal.univ-brest.fr/hal-03602644/file/Atmospheric-COsub2subestimates-for-the-Miocene-to-Pleistocene-based-on-foraminiferal-11B-at-Ocean-Drilling-Program-Sites-806-and-807-in-the-Western-Equatorial-PacificClimate-of-the-Past.pdf doi:10.5194/cp-18-183-2022 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.univ-brest.fr/hal-03602644 Climate of the Past, 2022, 18 (2), pp.183-207. ⟨10.5194/cp-18-183-2022⟩ Ocean Drilling Program Miocene foraminifera estimation method carbon dioxide atmospheric dynamics Pleistocene [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2022 ftccsdartic https://doi.org/10.5194/cp-18-183-2022 2023-11-19T00:14:39Z International audience Abstract. Constraints on the evolution of atmospheric CO2 levels throughout Earth's history are foundational to our understanding of past variations in climate. Despite considerable effort, records vary in their temporal and spatial coverage and estimates of past CO2 levels do not always converge, and therefore new records and proxies are valuable. Here we reconstruct atmospheric CO2 values across major climate transitions over the past 16 million years using the boron isotopic composition (δ11B) of planktic foraminifera from 89 samples obtained from two sites in the West Pacific Warm Pool, Ocean Drilling Program (ODP) Sites 806 and 807, measured using high-precision multi-collector inductively coupled plasma mass spectrometry. We compare our results to published data from ODP Site 872, also in the Western Equatorial Pacific, that goes back to 22 million years ago. These sites are in a region that today is near equilibrium with the atmosphere and are thought to have been in equilibrium with the atmosphere for the interval studied. We show that δ11B data from this region are consistent with other boron-based studies. The data show evidence for elevated pCO2 during the Middle Miocene and Early to Middle Pliocene, and reductions in pCO2 of ∼200 ppm during the Middle Miocene Climate Transition, ∼250 ppm during Pliocene Glacial Intensification and ∼50 ppm during the Mid-Pleistocene Climate Transition. During the Mid-Pleistocene Transition there is a minimum pCO2 at marine isotopic stage (MIS) 30. Our results are consistent with a coupling between pCO2, temperature and ice sheet expansion from the Miocene to the late Quaternary. Article in Journal/Newspaper Ice Sheet Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Pacific Climate of the Past 18 2 183 207 |