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Glacial Indonesian Throughflow weakening across the Mid-Pleistocene Climatic Transition

Glacial Indonesian Throughflow weakening across the Mid-Pleistocene Climatic Transition
Glacial Indonesian Throughflow weakening across the Mid-Pleistocene Climatic Transition
The Indonesian Throughflow (ITF) controls the oceanic flux of heat and salt between the Pacific and Indian Oceans and therewith plays an important role in modulating the meridional overturning circulation and low latitude hydrological cycle. Here, we report new sea surface temperature and aridity records from the west coast of Australia (IODP Site U1460), which allow us to assess the sensitivity of the eastern Indian Ocean to the major reorganization of Earth’s climate that occurred during the Mid-Pleistocene Transition. Our records indicate glacial coolings at 1.55 and 0.65 million years ago that are best explained by a weakening of the ITF as a consequence of global sea level and tectonic changes. These coincide with the development of pronounced gradients in the carbon isotope composition of the different ocean basins and with substantial changes in regional aridity, suggesting that the restrictions of the ITF influenced both the evolution of global ocean circulation and the development of the modern hydrological cycle in Western Australia.
2045-2322
Petrick, Benjamin
f40bc692-c5fe-45ba-8024-b9122e3e3287
Martínez-García, Alfredo
29c2896b-3a8c-4457-b640-5c3ac1b9d272
Auer, Gerald
e0c0fee2-91b3-4e9c-90b6-88a7183c1232
Reuning, Lars
245902d4-be81-4a92-989d-ad3e22e4e7fd
Auderset, Alexandra
a6054a25-7c59-49fe-a2cd-62c1d3f3c8b3
Deik, Hanaa
5e9f759b-af9f-47ac-8dc5-ecfed01ae254
Takayanagi, Hideko
306c3d56-d739-4ea6-ba8f-aea963b51c9b
Vleeschouwer, David De
02119b4f-3590-447c-b9f6-2043926ea057
Iryu, Yasufumi
74b138c2-e732-49e2-9c62-64a1196d6371
Haug, Gerald H.
b6d161a0-4bdc-44d3-8a88-8de0e3517ca8
Petrick, Benjamin
f40bc692-c5fe-45ba-8024-b9122e3e3287
Martínez-García, Alfredo
29c2896b-3a8c-4457-b640-5c3ac1b9d272
Auer, Gerald
e0c0fee2-91b3-4e9c-90b6-88a7183c1232
Reuning, Lars
245902d4-be81-4a92-989d-ad3e22e4e7fd
Auderset, Alexandra
a6054a25-7c59-49fe-a2cd-62c1d3f3c8b3
Deik, Hanaa
5e9f759b-af9f-47ac-8dc5-ecfed01ae254
Takayanagi, Hideko
306c3d56-d739-4ea6-ba8f-aea963b51c9b
Vleeschouwer, David De
02119b4f-3590-447c-b9f6-2043926ea057
Iryu, Yasufumi
74b138c2-e732-49e2-9c62-64a1196d6371
Haug, Gerald H.
b6d161a0-4bdc-44d3-8a88-8de0e3517ca8

Petrick, Benjamin, Martínez-García, Alfredo, Auer, Gerald, Reuning, Lars, Auderset, Alexandra, Deik, Hanaa, Takayanagi, Hideko, Vleeschouwer, David De, Iryu, Yasufumi and Haug, Gerald H. (2019) Glacial Indonesian Throughflow weakening across the Mid-Pleistocene Climatic Transition. Scientific Reports, 9 (11), [16995]. (doi:10.1038/s41598-019-53382-0).

Record type: Article

Abstract

The Indonesian Throughflow (ITF) controls the oceanic flux of heat and salt between the Pacific and Indian Oceans and therewith plays an important role in modulating the meridional overturning circulation and low latitude hydrological cycle. Here, we report new sea surface temperature and aridity records from the west coast of Australia (IODP Site U1460), which allow us to assess the sensitivity of the eastern Indian Ocean to the major reorganization of Earth’s climate that occurred during the Mid-Pleistocene Transition. Our records indicate glacial coolings at 1.55 and 0.65 million years ago that are best explained by a weakening of the ITF as a consequence of global sea level and tectonic changes. These coincide with the development of pronounced gradients in the carbon isotope composition of the different ocean basins and with substantial changes in regional aridity, suggesting that the restrictions of the ITF influenced both the evolution of global ocean circulation and the development of the modern hydrological cycle in Western Australia.

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More information

Accepted/In Press date: 29 October 2019
Published date: 18 November 2019

Identifiers

Local EPrints ID: 473608
URI: http://eprints.soton.ac.uk/id/eprint/473608
ISSN: 2045-2322
PURE UUID: f4f84611-0532-4c46-8489-5a93c53266bd
ORCID for Alexandra Auderset: ORCID iD orcid.org/0000-0002-6316-4980

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Date deposited: 24 Jan 2023 17:52
Last modified: 17 Mar 2024 04:18

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Contributors

Author: Benjamin Petrick
Author: Alfredo Martínez-García
Author: Gerald Auer
Author: Lars Reuning
Author: Alexandra Auderset ORCID iD
Author: Hanaa Deik
Author: Hideko Takayanagi
Author: David De Vleeschouwer
Author: Yasufumi Iryu
Author: Gerald H. Haug

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