A modeling study of physical and biogeochemical changes occurring in the tropical Indian Ocean during Miocene times
International audience
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| Format: | Conference Object |
| Language: | English |
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HAL CCSD
2020
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| Online Access: | https://hal.archives-ouvertes.fr/hal-03004020 |
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ftccsdartic:oai:HAL:hal-03004020v1 |
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openpolar |
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ftccsdartic:oai:HAL:hal-03004020v1 2023-05-15T13:50:14+02:00 A modeling study of physical and biogeochemical changes occurring in the tropical Indian Ocean during Miocene times The South Asian Monsoon (SAM) is one of the most important climatic features of the Asian continent. Proxy-based reconstructions from continuous records in the Indian Ocean suggest an intensification of the monsoon from the early to the middle Miocene (between 20 and 11 Ma), with a modern wind distribution and strength potentially reached by ~13 Ma. Concurrent with the SAM intensification, a major reorganization of surface ocean currents occurred in the Indian Ocean. The timing of monsoon strengthening overlaps with changes in Indian Ocean and Indonesian Gateway configurations, increasing topography in the Himalayas, global cooling, as well as East Antarctic Ice Sheet expansion. Thus, the respective influence of each factor on SAM evolution and Indian Ocean paleoceanography is still poorly understood owing to the modification of multiple forcing mechanisms.Here we will use a set of experiments with the IPSL-CM5A2 Earth System Model under early to late Miocene configurations in order to tease apart the effects of paleogeography changes, ice-sheet growth and CO2 levels on the Indian Ocean region during the Miocene. We will focus on the impact of increasing SAM winds and precipitation on the oceanographic conditions in the Indian Ocean including not only physical parameters but also biogeochemical ones. Sarr , Anta-Clarisse Donnadieu, Yannick Bolton, C. T. Suchéras-Marx, Baptiste Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD) Washington DC, United States 2020-01-06 https://hal.archives-ouvertes.fr/hal-03004020 en eng HAL CCSD hal-03004020 https://hal.archives-ouvertes.fr/hal-03004020 AGU Chapman Conference 2020 https://hal.archives-ouvertes.fr/hal-03004020 AGU Chapman Conference 2020, Jan 2020, Washington DC, United States [SDE]Environmental Sciences info:eu-repo/semantics/conferenceObject Conference papers 2020 ftccsdartic 2021-11-13T23:57:35Z International audience Conference Object Antarc* Antarctic Ice Sheet Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic East Antarctic Ice Sheet Indian |
| institution |
Open Polar |
| collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
| op_collection_id |
ftccsdartic |
| language |
English |
| topic |
[SDE]Environmental Sciences |
| spellingShingle |
[SDE]Environmental Sciences Sarr , Anta-Clarisse Donnadieu, Yannick Bolton, C. T. Suchéras-Marx, Baptiste A modeling study of physical and biogeochemical changes occurring in the tropical Indian Ocean during Miocene times |
| topic_facet |
[SDE]Environmental Sciences |
| description |
International audience |
| author2 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD) |
| format |
Conference Object |
| author |
Sarr , Anta-Clarisse Donnadieu, Yannick Bolton, C. T. Suchéras-Marx, Baptiste |
| author_facet |
Sarr , Anta-Clarisse Donnadieu, Yannick Bolton, C. T. Suchéras-Marx, Baptiste |
| author_sort |
Sarr , Anta-Clarisse |
| title |
A modeling study of physical and biogeochemical changes occurring in the tropical Indian Ocean during Miocene times |
| title_short |
A modeling study of physical and biogeochemical changes occurring in the tropical Indian Ocean during Miocene times |
| title_full |
A modeling study of physical and biogeochemical changes occurring in the tropical Indian Ocean during Miocene times |
| title_fullStr |
A modeling study of physical and biogeochemical changes occurring in the tropical Indian Ocean during Miocene times |
| title_full_unstemmed |
A modeling study of physical and biogeochemical changes occurring in the tropical Indian Ocean during Miocene times |
| title_sort |
modeling study of physical and biogeochemical changes occurring in the tropical indian ocean during miocene times |
| publisher |
HAL CCSD |
| publishDate |
2020 |
| url |
https://hal.archives-ouvertes.fr/hal-03004020 |
| op_coverage |
Washington DC, United States |
| geographic |
Antarctic East Antarctic Ice Sheet Indian |
| geographic_facet |
Antarctic East Antarctic Ice Sheet Indian |
| genre |
Antarc* Antarctic Ice Sheet |
| genre_facet |
Antarc* Antarctic Ice Sheet |
| op_source |
AGU Chapman Conference 2020 https://hal.archives-ouvertes.fr/hal-03004020 AGU Chapman Conference 2020, Jan 2020, Washington DC, United States |
| op_relation |
hal-03004020 https://hal.archives-ouvertes.fr/hal-03004020 |
| _version_ |
1766253269567406080 |