Initiation of the Western Pacific Warm Pool at the Middle Miocene Climate Transition?
Across the middle Miocene, Earth’s climate underwent a major cooling and expansion of the Antarctic ice sheet. However, the associated response and development of the tropical climate system is not fully understood, in part because this is influenced by both global climate and also low latitude tect...
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ftzenodo:oai:zenodo.org:4155835 2023-05-15T13:36:37+02:00 Initiation of the Western Pacific Warm Pool at the Middle Miocene Climate Transition? Sindia Sosdian Carrie Lear 2020-11-04 https://zenodo.org/record/4155835 https://doi.org/10.5281/zenodo.4155835 unknown doi:10.5281/zenodo.4155834 https://zenodo.org/record/4155835 https://doi.org/10.5281/zenodo.4155835 oai:zenodo.org:4155835 info:eu-repo/semantics/restrictedAccess Paleoceanography and Paleoclimatology Miocene Tropics Mg/Ca planktic foraminifera glaciation Indo-Pacific info:eu-repo/semantics/article publication-article 2020 ftzenodo https://doi.org/10.5281/zenodo.415583510.5281/zenodo.4155834 2023-03-11T00:35:14Z Across the middle Miocene, Earth’s climate underwent a major cooling and expansion of the Antarctic ice sheet. However, the associated response and development of the tropical climate system is not fully understood, in part because this is influenced by both global climate and also low latitude tectonic gateways and paleoceanography. Here we use combined d18O and Mg/Ca of planktic foraminifera to reconstruct the thermal history and changes in hydrology from the Indo-Pacific region from 16.5 to 11.5 Ma. During the warmth of the early middle Miocene, our records indicate a dynamic ocean-atmosphere system in the Indo-Pacific region, with episodes of saltier and warmer tropical surface waters associated with high pCO2 and retreat of the Antarctic ice sheet. We show that across the middle Miocene Climate Transition (MMCT) surface ocean temperatures in the Indo-Pacific cooled by ~ 2˚C, synchronous with the advance of the Antarctic ice sheet. The associated cooling in the Southern Ocean appears to have started earlier, and was stronger. Further, we show that western Pacific Ocean warmed and eastern tropical Indian Ocean freshened following the MMCT, likely caused by the constriction of the Indonesian Seaway and reduced connectivity between the Pacific and Indian Oceans following Antarctic glaciation. The MMCT therefore represented a key phase in the evolution of the West Pacific Warm Pool and associated tropical climate dynamics. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Southern Ocean Zenodo Antarctic Southern Ocean The Antarctic Pacific Indian |
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Miocene Tropics Mg/Ca planktic foraminifera glaciation Indo-Pacific |
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Miocene Tropics Mg/Ca planktic foraminifera glaciation Indo-Pacific Sindia Sosdian Carrie Lear Initiation of the Western Pacific Warm Pool at the Middle Miocene Climate Transition? |
topic_facet |
Miocene Tropics Mg/Ca planktic foraminifera glaciation Indo-Pacific |
description |
Across the middle Miocene, Earth’s climate underwent a major cooling and expansion of the Antarctic ice sheet. However, the associated response and development of the tropical climate system is not fully understood, in part because this is influenced by both global climate and also low latitude tectonic gateways and paleoceanography. Here we use combined d18O and Mg/Ca of planktic foraminifera to reconstruct the thermal history and changes in hydrology from the Indo-Pacific region from 16.5 to 11.5 Ma. During the warmth of the early middle Miocene, our records indicate a dynamic ocean-atmosphere system in the Indo-Pacific region, with episodes of saltier and warmer tropical surface waters associated with high pCO2 and retreat of the Antarctic ice sheet. We show that across the middle Miocene Climate Transition (MMCT) surface ocean temperatures in the Indo-Pacific cooled by ~ 2˚C, synchronous with the advance of the Antarctic ice sheet. The associated cooling in the Southern Ocean appears to have started earlier, and was stronger. Further, we show that western Pacific Ocean warmed and eastern tropical Indian Ocean freshened following the MMCT, likely caused by the constriction of the Indonesian Seaway and reduced connectivity between the Pacific and Indian Oceans following Antarctic glaciation. The MMCT therefore represented a key phase in the evolution of the West Pacific Warm Pool and associated tropical climate dynamics. |
format |
Article in Journal/Newspaper |
author |
Sindia Sosdian Carrie Lear |
author_facet |
Sindia Sosdian Carrie Lear |
author_sort |
Sindia Sosdian |
title |
Initiation of the Western Pacific Warm Pool at the Middle Miocene Climate Transition? |
title_short |
Initiation of the Western Pacific Warm Pool at the Middle Miocene Climate Transition? |
title_full |
Initiation of the Western Pacific Warm Pool at the Middle Miocene Climate Transition? |
title_fullStr |
Initiation of the Western Pacific Warm Pool at the Middle Miocene Climate Transition? |
title_full_unstemmed |
Initiation of the Western Pacific Warm Pool at the Middle Miocene Climate Transition? |
title_sort |
initiation of the western pacific warm pool at the middle miocene climate transition? |
publishDate |
2020 |
url |
https://zenodo.org/record/4155835 https://doi.org/10.5281/zenodo.4155835 |
geographic |
Antarctic Southern Ocean The Antarctic Pacific Indian |
geographic_facet |
Antarctic Southern Ocean The Antarctic Pacific Indian |
genre |
Antarc* Antarctic Ice Sheet Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Sheet Southern Ocean |
op_source |
Paleoceanography and Paleoclimatology |
op_relation |
doi:10.5281/zenodo.4155834 https://zenodo.org/record/4155835 https://doi.org/10.5281/zenodo.4155835 oai:zenodo.org:4155835 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.5281/zenodo.415583510.5281/zenodo.4155834 |
_version_ |
1766081782610919424 |