Zhong, Yi;
Liu, Yanguang;
Yang, Hu;
Yin, Qiuzhen;
Wilson, David J;
Lu, Zhengyao;
Jaccard, Samuel L;
... Liu, Qingsong; + view all
(2024)
Orbital Controls on North Pacific Dust Flux During the Late Quaternary.
Geophysical Research Letters
, 51
(4)
, Article e2023GL106631. 10.1029/2023gl106631.
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Abstract
Airborne mineral dust is sensitive to climatic changes, but its response to orbital forcing is still not fully understood. Here, we present a reconstruction of dust input to the Subarctic Pacific Ocean covering the past 190 kyr. The dust composition record is indicative of source moisture conditions, which were dominated by precessional variations. In contrast, the dust flux record is dominated by obliquity variations and displays an out‐of‐phase relationship with a dust record from the mid‐latitude North Pacific Ocean. Climate model simulations suggest precession likely drove changes in the aridity and extent of dust source regions. Additionally, the obliquity variations in dust flux can be explained by meridional shifts in the North Pacific westerly jet, driven by changes in the meridional atmospheric temperature gradient. Overall, our findings suggest that North Pacific dust input was primarily modulated by orbital‐controlled source aridity and the strength and position of the westerly winds.
| Type: | Article |
|---|---|
| Title: | Orbital Controls on North Pacific Dust Flux During the Late Quaternary |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2023gl106631 |
| Publisher version: | http://dx.doi.org/10.1029/2023gl106631 |
| Language: | English |
| Additional information: | © 2024. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, 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. |
| 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/10187199 |
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