Yu, Zhaojie;
Tang, Xiaojie;
Colin, Christophe;
Wilson, David J;
Zhou, Xinquan;
Song, Lina;
Chang, Fengming;
... Wan, Shiming; + view all
(2023)
Millennial‐scale precipitation variability in the Indo‐Pacific region over the last 40 kyr.
Geophysical Research Letters
, 50
(2)
, Article e2022GL101646. 10.1029/2022gl101646.
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Abstract
Deep atmospheric convection in the Indo-Pacific Warm Pool (IPWP) represents a major source of heat and moisture, thereby affecting the global climate, but its past changes remain debated. Here, we present sub-millennial clay mineralogy and elemental records spanning the last 40 kyr from within the IPWP. From these data, we infer millennial-scale fluctuations in precipitation, with generally lower precipitation during Heinrich Stadials 1-4, corresponding to El Niño-like conditions. Higher precipitation coincided with the warm interstadials, accompanied by La Niña-like conditions. Moreover, our record indicates the lowest precipitation occurred during the late Holocene, supporting the hypothesis of a stronger-than-modern Walker circulation during the Last Glacial Maximum. In combination with other proxy records and TraCE-21 modelling results, we recognize a distinct spatial heterogeneity of precipitation within the IPWP, resulting from the dominant influences of the ENSO-like system and migration of the Intertropical Convergence Zone in the eastern and western IPWP, respectively.
| Type: | Article |
|---|---|
| Title: | Millennial‐scale precipitation variability in the Indo‐Pacific region over the last 40 kyr |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2022gl101646 |
| Publisher version: | https://doi.org/10.1029/2022gl101646 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For the purpose of open access under the UKRI funding policy, the author has applied a Creative Commons Attribution (CC BY) licence (https://creativecommons.org/licenses/by/4.0/) to any Author Accepted Manuscript version arising. - The published version is available at https://doi.org/10.1029/2022GL101646 under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. |
| Keywords: | Weathering, Clay mineralogy, Hydroclimate, ENSO, Indo-Pacific Warm Pool |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10162061 |
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