中文版 | English
Title

Equatorial Pacific dust fertilization and source weathering influences on Eocene to Miocene global CO2 decline

Author
Corresponding AuthorLiu,Qingsong
Publication Years
2023-02-15
DOI
Source Title
EISSN
2662-4435
Volume4Issue:1
Abstract

Stimulation of the biological pump by iron-bearing dust in the eastern equatorial Pacific Ocean plays an important role in long-term carbon sequestration, yet past dust fertilization and its impact on CO perturbations over major climate transitions remain debated. Here, we integrate proxies of dust input, source-region weathering, and biological pump activity from late Eocene to early Miocene sediments of Integrated Ocean Discovery Program Hole U1333, which includes the Eocene-Oligocene Transition (~34 million years ago) when a major ice sheet was first established on Antarctica. We find that intensified chemical weathering in the large central Asian dust source region enhanced atmospheric CO removal at ~34 Ma. Superimposed dust fertilization and biological pump action amplified this CO removal before ~34 Ma, while weakening of this amplification process helped to moderate the CO decline after that time. The observed inter-linked, counteracting processes with different timescales illustrate the complexity of carbon cycle feedbacks associated with major climate changes.;Stimulation of the biological pump by iron-bearing dust in the eastern equatorial Pacific Ocean plays an important role in long-term carbon sequestration, yet past dust fertilization and its impact on CO perturbations over major climate transitions remain debated. Here, we integrate proxies of dust input, source-region weathering, and biological pump activity from late Eocene to early Miocene sediments of Integrated Ocean Discovery Program Hole U1333, which includes the Eocene-Oligocene Transition (~34 million years ago) when a major ice sheet was first established on Antarctica. We find that intensified chemical weathering in the large central Asian dust source region enhanced atmospheric CO removal at ~34 Ma. Superimposed dust fertilization and biological pump action amplified this CO removal before ~34 Ma, while weakening of this amplification process helped to moderate the CO decline after that time. The observed inter-linked, counteracting processes with different timescales illustrate the complexity of carbon cycle feedbacks associated with major climate changes.;Stimulation of the biological pump by iron-bearing dust in the eastern equatorial Pacific Ocean plays an important role in long-term carbon sequestration, yet past dust fertilization and its impact on CO perturbations over major climate transitions remain debated. Here, we integrate proxies of dust input, source-region weathering, and biological pump activity from late Eocene to early Miocene sediments of Integrated Ocean Discovery Program Hole U1333, which includes the Eocene-Oligocene Transition (~34 million years ago) when a major ice sheet was first established on Antarctica. We find that intensified chemical weathering in the large central Asian dust source region enhanced atmospheric CO removal at ~34 Ma. Superimposed dust fertilization and biological pump action amplified this CO removal before ~34 Ma, while weakening of this amplification process helped to moderate the CO decline after that time. The observed inter-linked, counteracting processes with different timescales illustrate the complexity of carbon cycle feedbacks associated with major climate changes.;Stimulation of the biological pump by iron-bearing dust in the eastern equatorial Pacific Ocean plays an important role in long-term carbon sequestration, yet past dust fertilization and its impact on CO perturbations over major climate transitions remain debated. Here, we integrate proxies of dust input, source-region weathering, and biological pump activity from late Eocene to early Miocene sediments of Integrated Ocean Discovery Program Hole U1333, which includes the Eocene-Oligocene Transition (~34 million years ago) when a major ice sheet was first established on Antarctica. We find that intensified chemical weathering in the large central Asian dust source region enhanced atmospheric CO removal at ~34 Ma. Superimposed dust fertilization and biological pump action amplified this CO removal before ~34 Ma, while weakening of this amplification process helped to moderate the CO decline after that time. The observed inter-linked, counteracting processes with different timescales illustrate the complexity of carbon cycle feedbacks associated with major climate changes.

URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
National Natural Science Foundation of China[
WOS Research Area
Environmental Sciences & Ecology ; Environmental Sciences & Ecology ; Environmental Sciences & Ecology ; Environmental Sciences & Ecology ; Geology ; Geology ; Geology ; Geology ; Meteorology & Atmospheric Sciences ; Meteorology & Atmospheric Sciences ; Meteorology & Atmospheric Sciences ; Meteorology & Atmospheric Sciences
WOS Subject
Environmental Sciences ; Environmental Sciences ; Environmental Sciences ; Environmental Sciences ; Geosciences, Multidisciplinary ; Geosciences, Multidisciplinary ; Geosciences, Multidisciplinary ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Meteorology & Atmospheric Sciences ; Meteorology & Atmospheric Sciences ; Meteorology & Atmospheric Sciences
WOS Accession No
WOS:000938794700001
Publisher
Scopus EID
2-s2.0-85148424285
Data Source
Scopus
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/489733
DepartmentDepartment of Ocean Science and Engineering
Affiliation
1.Centre for Marine Magnetism (CM2),Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou),Guangzhou,China
3.Research School of Earth Sciences,Australian National University,Canberra,2601,Australia
4.School of Ocean and Earth Science,University of Southampton,National Oceanography Centre,Southampton,SO14 3ZH,United Kingdom
5.Key Laboratory of Marine Geology and Metallogeny,First Institute of Oceanography,MNR,Qingdao,266061,China
6.Laboratory for Marine Geology,Pilot National Laboratory for Marine Science and Technology,Qingdao,266061,China
First Author AffilicationDepartment of Ocean Science and Engineering
Corresponding Author AffilicationDepartment of Ocean Science and Engineering
First Author's First AffilicationDepartment of Ocean Science and Engineering
Recommended Citation
GB/T 7714
Wang,Dunfan,Roberts,Andrew P.,Rohling,Eelco J.,et al. Equatorial Pacific dust fertilization and source weathering influences on Eocene to Miocene global CO2 decline[J]. Communications Earth and Environment,2023,4(1).
APA
Wang,Dunfan.,Roberts,Andrew P..,Rohling,Eelco J..,Yao,Weiqi.,Zhong,Yi.,...&Liu,Qingsong.(2023).Equatorial Pacific dust fertilization and source weathering influences on Eocene to Miocene global CO2 decline.Communications Earth and Environment,4(1).
MLA
Wang,Dunfan,et al."Equatorial Pacific dust fertilization and source weathering influences on Eocene to Miocene global CO2 decline".Communications Earth and Environment 4.1(2023).
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