ST Belt
Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years.
Belt, ST; Smik, L; Vogel, H; Peck, VL; Armbrecht, L; Cage, A; Cardillo, FG; Du, Z; Fauth, G; Fogwill, CJ; Garcia, M; Garnsworthy, M; Glüder, A; Guitard, M; Gutjahr, M; Hernández-Almeida, I; Hoem, FS; Hwang, J-H; Iizuka, M; Kato, Y; Kenlee, B; OConnell, S; Pérez, LF; Seki, O; Stevens, L; Tauxe, L; Tripathi, S; Warnock, J; Zheng, X; Weber, ME; Bailey, I; Hemming, SR; Martos, YM; Reilly, BT; Ronge, TA; Brachfeld, S; Williams, T; Raymo, M
Authors
L Smik
H Vogel
VL Peck
L Armbrecht
Alix Cage a.g.cage@keele.ac.uk
FG Cardillo
Z Du
G Fauth
CJ Fogwill
M Garcia
M Garnsworthy
A Glüder
M Guitard
M Gutjahr
I Hernández-Almeida
FS Hoem
J-H Hwang
M Iizuka
Y Kato
B Kenlee
S OConnell
LF Pérez
O Seki
L Stevens
L Tauxe
S Tripathi
J Warnock
X Zheng
ME Weber
I Bailey
SR Hemming
YM Martos
BT Reilly
TA Ronge
S Brachfeld
T Williams
M Raymo
Abstract
The Southern Ocean paleoceanography provides key insights into how iron fertilization and oceanic productivity developed through Pleistocene ice-ages and their role in influencing the carbon cycle. We report a high-resolution record of dust deposition and ocean productivity for the Antarctic Zone, close to the main dust source, Patagonia. Our deep-ocean records cover the last 1.5?Ma, thus doubling that from Antarctic ice-cores. We find a 5 to 15-fold increase in dust deposition during glacials and a 2 to 5-fold increase in biogenic silica deposition, reflecting higher ocean productivity during interglacials. This antiphasing persisted throughout the last 25 glacial cycles. Dust deposition became more pronounced across the Mid-Pleistocene Transition (MPT) in the Southern Hemisphere, with an abrupt shift suggesting more severe glaciations since ~0.9?Ma. Productivity was intermediate pre-MPT, lowest during the MPT and highest since 0.4?Ma. Generally, glacials experienced extended sea-ice cover, reduced bottom-water export and Weddell Gyre dynamics, which helped lower atmospheric CO2 levels.
Citation
Belt, S., Smik, L., Vogel, H., Peck, V., Armbrecht, L., Cage, A., …Raymo, M. (2022). Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years. Nature communications, 2044 - ?. https://doi.org/10.1038/s41467-022-29642-5
Acceptance Date | Mar 25, 2022 |
---|---|
Publication Date | Apr 19, 2022 |
Journal | Nature Communications |
Print ISSN | 2041-1723 |
Pages | 2044 - ? |
DOI | https://doi.org/10.1038/s41467-022-29642-5 |
Keywords | cryospheric science; palaeoceanography |
Publisher URL | https://www.nature.com/articles/s41467-022-29642-5?msclkid=a13e9bb7cf7211ec907b51b717e28d6f#article-info |
Files
s41467-022-29642-5.pdf
(6.9 Mb)
PDF
Publisher Licence URL
https://creativecommons.org/licenses/by/4.0/
You might also like
Decoupled dust deposition and ocean productivity in the Antarctic Zone of the Southern Ocean
(2021)
Conference Proceeding
The evolution of a coastal carbon store over the last millennium
(2021)
Journal Article
Downloadable Citations
About Keele Repository
Administrator e-mail: research.openaccess@keele.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search