Paleogeographic controls on the evolution of Late Cretaceous ocean circulation
International audience Abstract. Understanding of the role of ocean circulation on climate during the Late Cretaceous is contingent on the ability to reconstruct its modes and evolution. Geochemical proxies used to infer modes of past circulation provide conflicting interpretations for the reorganiz...
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
2020
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-03695173 https://hal.archives-ouvertes.fr/hal-03695173/document https://hal.archives-ouvertes.fr/hal-03695173/file/cp-16-973-2020.pdf https://doi.org/10.5194/cp-16-973-2020 |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
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English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Ladant, Jean-Baptiste Poulsen, Christopher Fluteau, Frédéric Tabor, Clay Macleod, Kenneth Martin, Ellen Haynes, Shannon Rostami, Masoud Paleogeographic controls on the evolution of Late Cretaceous ocean circulation |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Abstract. Understanding of the role of ocean circulation on climate during the Late Cretaceous is contingent on the ability to reconstruct its modes and evolution. Geochemical proxies used to infer modes of past circulation provide conflicting interpretations for the reorganization of the ocean circulation through the Late Cretaceous. Here, we present climate model simulations of the Cenomanian (100.5–93.9 Ma) and Maastrichtian (72.1–66.1 Ma) stages of the Cretaceous with the CCSM4 earth system model. We focus on intermediate (500–1500 m) and deep (> 1500 m) ocean circulation and show that while there is continuous deep-water production in the southwestern Pacific, major circulation changes occur between the Cenomanian and Maastrichtian. Opening of the Atlantic and Southern Ocean, in particular, drives a transition from a mostly zonal circulation to enhanced meridional exchange. Using additional experiments to test the effect of deepening of major ocean gateways in the Maastrichtian, we demonstrate that the geometry of these gateways likely had a considerable impact on ocean circulation. We further compare simulated circulation results with compilations of εNd records and show that simulated changes in Late Cretaceous ocean circulation are reasonably consistent with proxy-based inferences. In our simulations, consistency with the geologic history of major ocean gateways and absence of shift in areas of deep-water formation suggest that Late Cretaceous trends in εNd values in the Atlantic and southern Indian oceans were caused by the subsidence of volcanic provinces and opening of the Atlantic and Southern oceans rather than changes in deep-water formation areas and/or reversal of deep-water fluxes. However, the complexity in interpreting Late Cretaceous εNd values underscores the need for new records as well as specific εNd modeling to better discriminate between the various plausible theories of ocean circulation change during this period. |
author2 |
Department of Earth and Environmental Sciences Ann Arbor University of Michigan Ann Arbor University of Michigan System-University of Michigan System Institut de Physique du Globe de Paris (IPGP (UMR_7154)) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Department of Geosciences, University of Connecticut Department of Geological Sciences, University of Missouri Department of Geosciences University of Florida Department of Geosciences Princeton Princeton University Ecology, Evolution and Conservation Biology Department, University of Nevada |
format |
Article in Journal/Newspaper |
author |
Ladant, Jean-Baptiste Poulsen, Christopher Fluteau, Frédéric Tabor, Clay Macleod, Kenneth Martin, Ellen Haynes, Shannon Rostami, Masoud |
author_facet |
Ladant, Jean-Baptiste Poulsen, Christopher Fluteau, Frédéric Tabor, Clay Macleod, Kenneth Martin, Ellen Haynes, Shannon Rostami, Masoud |
author_sort |
Ladant, Jean-Baptiste |
title |
Paleogeographic controls on the evolution of Late Cretaceous ocean circulation |
title_short |
Paleogeographic controls on the evolution of Late Cretaceous ocean circulation |
title_full |
Paleogeographic controls on the evolution of Late Cretaceous ocean circulation |
title_fullStr |
Paleogeographic controls on the evolution of Late Cretaceous ocean circulation |
title_full_unstemmed |
Paleogeographic controls on the evolution of Late Cretaceous ocean circulation |
title_sort |
paleogeographic controls on the evolution of late cretaceous ocean circulation |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.archives-ouvertes.fr/hal-03695173 https://hal.archives-ouvertes.fr/hal-03695173/document https://hal.archives-ouvertes.fr/hal-03695173/file/cp-16-973-2020.pdf https://doi.org/10.5194/cp-16-973-2020 |
geographic |
Southern Ocean Pacific Indian |
geographic_facet |
Southern Ocean Pacific Indian |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.archives-ouvertes.fr/hal-03695173 Climate of the Past, 2020, 16 (3), pp.973-1006. ⟨10.5194/cp-16-973-2020⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-16-973-2020 hal-03695173 https://hal.archives-ouvertes.fr/hal-03695173 https://hal.archives-ouvertes.fr/hal-03695173/document https://hal.archives-ouvertes.fr/hal-03695173/file/cp-16-973-2020.pdf doi:10.5194/cp-16-973-2020 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-16-973-2020 |
container_title |
Climate of the Past |
container_volume |
16 |
container_issue |
3 |
container_start_page |
973 |
op_container_end_page |
1006 |
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1766207624401911808 |
spelling |
ftunivnantes:oai:HAL:hal-03695173v1 2023-05-15T18:25:54+02:00 Paleogeographic controls on the evolution of Late Cretaceous ocean circulation Ladant, Jean-Baptiste Poulsen, Christopher Fluteau, Frédéric Tabor, Clay Macleod, Kenneth Martin, Ellen Haynes, Shannon Rostami, Masoud Department of Earth and Environmental Sciences Ann Arbor University of Michigan Ann Arbor University of Michigan System-University of Michigan System Institut de Physique du Globe de Paris (IPGP (UMR_7154)) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Department of Geosciences, University of Connecticut Department of Geological Sciences, University of Missouri Department of Geosciences University of Florida Department of Geosciences Princeton Princeton University Ecology, Evolution and Conservation Biology Department, University of Nevada 2020 https://hal.archives-ouvertes.fr/hal-03695173 https://hal.archives-ouvertes.fr/hal-03695173/document https://hal.archives-ouvertes.fr/hal-03695173/file/cp-16-973-2020.pdf https://doi.org/10.5194/cp-16-973-2020 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-16-973-2020 hal-03695173 https://hal.archives-ouvertes.fr/hal-03695173 https://hal.archives-ouvertes.fr/hal-03695173/document https://hal.archives-ouvertes.fr/hal-03695173/file/cp-16-973-2020.pdf doi:10.5194/cp-16-973-2020 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.archives-ouvertes.fr/hal-03695173 Climate of the Past, 2020, 16 (3), pp.973-1006. ⟨10.5194/cp-16-973-2020⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2020 ftunivnantes https://doi.org/10.5194/cp-16-973-2020 2022-12-07T00:36:23Z International audience Abstract. Understanding of the role of ocean circulation on climate during the Late Cretaceous is contingent on the ability to reconstruct its modes and evolution. Geochemical proxies used to infer modes of past circulation provide conflicting interpretations for the reorganization of the ocean circulation through the Late Cretaceous. Here, we present climate model simulations of the Cenomanian (100.5–93.9 Ma) and Maastrichtian (72.1–66.1 Ma) stages of the Cretaceous with the CCSM4 earth system model. We focus on intermediate (500–1500 m) and deep (> 1500 m) ocean circulation and show that while there is continuous deep-water production in the southwestern Pacific, major circulation changes occur between the Cenomanian and Maastrichtian. Opening of the Atlantic and Southern Ocean, in particular, drives a transition from a mostly zonal circulation to enhanced meridional exchange. Using additional experiments to test the effect of deepening of major ocean gateways in the Maastrichtian, we demonstrate that the geometry of these gateways likely had a considerable impact on ocean circulation. We further compare simulated circulation results with compilations of εNd records and show that simulated changes in Late Cretaceous ocean circulation are reasonably consistent with proxy-based inferences. In our simulations, consistency with the geologic history of major ocean gateways and absence of shift in areas of deep-water formation suggest that Late Cretaceous trends in εNd values in the Atlantic and southern Indian oceans were caused by the subsidence of volcanic provinces and opening of the Atlantic and Southern oceans rather than changes in deep-water formation areas and/or reversal of deep-water fluxes. However, the complexity in interpreting Late Cretaceous εNd values underscores the need for new records as well as specific εNd modeling to better discriminate between the various plausible theories of ocean circulation change during this period. Article in Journal/Newspaper Southern Ocean Université de Nantes: HAL-UNIV-NANTES Southern Ocean Pacific Indian Climate of the Past 16 3 973 1006 |