Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years

Michael E. Weber; Ian Bailey; Sidney R. Hemming; Yasmina M. Martos; Brendan T. Reilly; Thomas A. Ronge; Stefanie Brachfeld; Trevor Williams; Maureen Raymo; Simon T. Belt; Lukas Smik; Hendrik Vogel; Victoria L. Peck; Linda Armbrecht; Alix Cage; Fabricio G. Cardillo; Zhiheng Du; Gerson Fauth; Christopher J. Fogwill; Marga Garcia; Marlo Garnsworthy; Anna Glüder; Michelle Guitard; Marcus Gutjahr; Iván Hernández-Almeida; Frida S. Hoem; Ji Hwan Hwang; Mutsumi Iizuka; Yuji Kato; Bridget Kenlee; Suzanne OConnell; Lara F. Pérez; Osamu Seki; Lee Stevens; Lisa Tauxe; Shubham Tripathi; Jonathan Warnock; Xufeng Zheng

doi:10.1038/s41467-022-29642-5

Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years

Michael E. Weber^*, Ian Bailey, Sidney R. Hemming, Yasmina M. Martos, Brendan T. Reilly, Thomas A. Ronge, Stefanie Brachfeld, Trevor Williams, Maureen Raymo, Simon T. Belt, Lukas Smik, Hendrik Vogel, Victoria L. Peck, Linda Armbrecht, Alix Cage, Fabricio G. Cardillo, Zhiheng Du, Gerson Fauth, Christopher J. Fogwill, Marga GarciaMarlo Garnsworthy, Anna Glüder, Michelle Guitard, Marcus Gutjahr, Iván Hernández-Almeida, Frida S. Hoem, Ji Hwan Hwang, Mutsumi Iizuka, Yuji Kato, Bridget Kenlee, Suzanne OConnell, Lara F. Pérez, Osamu Seki, Lee Stevens, Lisa Tauxe, Shubham Tripathi, Jonathan Warnock, Xufeng Zheng

^*Corresponding author for this work

School of Geography, Earth and Environmental Sciences

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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.

Original language	English
Article number	2044
Journal	Nature Communications
Volume	13
Issue number	1
Early online date	19 Apr 2022
DOIs	https://doi.org/10.1038/s41467-022-29642-5
Publication status	Published - 19 Apr 2022

ASJC Scopus subject areas

General Chemistry
General Biochemistry,Genetics and Molecular Biology
General Physics and Astronomy

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10.1038/s41467-022-29642-5

Weber et al NC 2022

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Weber, M. E., Bailey, I., Hemming, S. R., Martos, Y. M., Reilly, B. T., Ronge, T. A., Brachfeld, S., Williams, T., Raymo, M., Belt, S. T., Smik, L., Vogel, H., Peck, V. L., Armbrecht, L., Cage, A., Cardillo, F. G., Du, Z., Fauth, G., Fogwill, C. J., ... Zheng, X. (2022). Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years. Nature Communications, 13(1), Article 2044. https://doi.org/10.1038/s41467-022-29642-5

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title = "Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years",

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.",

author = "Weber, {Michael E.} and Ian Bailey and Hemming, {Sidney R.} and Martos, {Yasmina M.} and Reilly, {Brendan T.} and Ronge, {Thomas A.} and Stefanie Brachfeld and Trevor Williams and Maureen Raymo and Belt, {Simon T.} and Lukas Smik and Hendrik Vogel and Peck, {Victoria L.} and Linda Armbrecht and Alix Cage and Cardillo, {Fabricio G.} and Zhiheng Du and Gerson Fauth and Fogwill, {Christopher J.} and Marga Garcia and Marlo Garnsworthy and Anna Gl{\"u}der and Michelle Guitard and Marcus Gutjahr and Iv{\'a}n Hern{\'a}ndez-Almeida and Hoem, {Frida S.} and Hwang, {Ji Hwan} and Mutsumi Iizuka and Yuji Kato and Bridget Kenlee and Suzanne OConnell and P{\'e}rez, {Lara F.} and Osamu Seki and Lee Stevens and Lisa Tauxe and Shubham Tripathi and Jonathan Warnock and Xufeng Zheng",

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doi = "10.1038/s41467-022-29642-5",

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Weber, ME, Bailey, I, Hemming, SR, Martos, YM, Reilly, BT, Ronge, TA, Brachfeld, S, Williams, T, Raymo, M, 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, JH, Iizuka, M, Kato, Y, Kenlee, B, OConnell, S, Pérez, LF, Seki, O, Stevens, L, Tauxe, L, Tripathi, S, Warnock, J & Zheng, X 2022, 'Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years', Nature Communications, vol. 13, no. 1, 2044. https://doi.org/10.1038/s41467-022-29642-5

TY - JOUR

T1 - Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years

AU - Weber, Michael E.

AU - Bailey, Ian

AU - Hemming, Sidney R.

AU - Martos, Yasmina M.

AU - Reilly, Brendan T.

AU - Ronge, Thomas A.

AU - Brachfeld, Stefanie

AU - Williams, Trevor

AU - Raymo, Maureen

AU - Belt, Simon T.

AU - Smik, Lukas

AU - Vogel, Hendrik

AU - Peck, Victoria L.

AU - Armbrecht, Linda

AU - Cage, Alix

AU - Cardillo, Fabricio G.

AU - Du, Zhiheng

AU - Fauth, Gerson

AU - Fogwill, Christopher J.

AU - Garcia, Marga

AU - Garnsworthy, Marlo

AU - Glüder, Anna

AU - Guitard, Michelle

AU - Gutjahr, Marcus

AU - Hernández-Almeida, Iván

AU - Hoem, Frida S.

AU - Hwang, Ji Hwan

AU - Iizuka, Mutsumi

AU - Kato, Yuji

AU - Kenlee, Bridget

AU - OConnell, Suzanne

AU - Pérez, Lara F.

AU - Seki, Osamu

AU - Stevens, Lee

AU - Tauxe, Lisa

AU - Tripathi, Shubham

AU - Warnock, Jonathan

AU - Zheng, Xufeng

PY - 2022/4/19

Y1 - 2022/4/19

N2 - 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.

AB - 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.

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U2 - 10.1038/s41467-022-29642-5

DO - 10.1038/s41467-022-29642-5

M3 - Article

C2 - 35440628

SN - 2041-1723

VL - 13

JO - Nature Communications

JF - Nature Communications

IS - 1

M1 - 2044

ER -

Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years

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