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...
Main Authors: | , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
Zenodo
2020
|
Subjects: | |
Online Access: | https://dx.doi.org/10.5281/zenodo.4155834 https://zenodo.org/record/4155834 |
id |
ftdatacite:10.5281/zenodo.4155834 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.5281/zenodo.4155834 2023-05-15T13:47:15+02:00 Initiation of the Western Pacific Warm Pool at the Middle Miocene Climate Transition? Sindia Sosdian Lear, Carrie 2020 https://dx.doi.org/10.5281/zenodo.4155834 https://zenodo.org/record/4155834 unknown Zenodo https://dx.doi.org/10.5281/zenodo.4155835 Restricted Access info:eu-repo/semantics/restrictedAccess Miocene, Tropics, Mg/Ca, planktic foraminifera, glaciation, Indo-Pacific Text Journal article article-journal ScholarlyArticle 2020 ftdatacite https://doi.org/10.5281/zenodo.4155834 https://doi.org/10.5281/zenodo.4155835 2021-11-05T12:55:41Z 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 d 18 O 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 pCO 2 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. Text Antarc* Antarctic Ice Sheet Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Antarctic Southern Ocean The Antarctic Pacific Indian |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Miocene, Tropics, Mg/Ca, planktic foraminifera, glaciation, Indo-Pacific |
spellingShingle |
Miocene, Tropics, Mg/Ca, planktic foraminifera, glaciation, Indo-Pacific Sindia Sosdian Lear, Carrie 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 d 18 O 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 pCO 2 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 |
Text |
author |
Sindia Sosdian Lear, Carrie |
author_facet |
Sindia Sosdian Lear, Carrie |
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? |
publisher |
Zenodo |
publishDate |
2020 |
url |
https://dx.doi.org/10.5281/zenodo.4155834 https://zenodo.org/record/4155834 |
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_relation |
https://dx.doi.org/10.5281/zenodo.4155835 |
op_rights |
Restricted Access info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.5281/zenodo.4155834 https://doi.org/10.5281/zenodo.4155835 |
_version_ |
1766246818091368448 |