Multi-proxy reconstructions of productivity during the late Miocene

DOI

The Late Miocene Biogenic Bloom (LMBB), marked by notable increases in biogenic components in marine sediments, provides insights into the response of the biological pump to climate change. However, understanding the timing, distribution, and cause of the LMBB remains limited. We use marine barite, a refractory mineral precipitating from the water column associated with carbon export, and other proxies (bio-SiO2 MAR, CaCO3 MAR) to reconstruct productivity in the equatorial Indian Ocean and equatorial western Atlantic between 12 and 5 Ma. At the same time, we compiled bio-SiO2 MAR data from 21 sites in the global ocean during the late Miocene. Multi-proxy records reveal the onset of the LMBB in the equatorial Indian Ocean at ~9 Ma, primarily driven by more vigorous upwelling during global cooling. We suggest that the steepened meridional temperature gradient and the Antarctic ice sheet expansion have strengthened ocean overturning, facilitating nutrient supply and biogenic bloom in upwelling regions.

Identifier
DOI https://doi.org/10.1594/PANGAEA.973162
Related Identifier IsSupplementTo https://doi.org/10.1029/2024GL111748
Related Identifier References https://doi.org/10.1029/92PA00181
Related Identifier References https://doi.org/10.1029/2002PA000793
Related Identifier References https://doi.org/10.1016/C2020-1-02369-3
Related Identifier References https://doi.org/10.5194/cp-15-1715-2019
Related Identifier References https://doi.org/10.1016/0198-0149(89)90092-7
Related Identifier References https://doi.org/10.1038/366445a0
Related Identifier References https://doi.org/10.2973/odp.proc.ir.121.115.1989
Related Identifier References https://doi.org/10.2973/odp.proc.ir.154.109.1995
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.973162
Provenance
Creator Wu, Xinying ORCID logo; Hu, Yue; Nan, Jingbo; Yao, Weiqi
Publisher PANGAEA
Publication Year 2024
Funding Reference National Key Research and Development Program of China https://doi.org/10.13039/501100012166 Crossref Funder ID 2022YFF0802900 ; National Natural Science Foundation of China https://doi.org/10.13039/501100001809 Crossref Funder ID 42376049 ; Natural Science Foundation of Guangdong Province https://doi.org/10.13039/501100003453 Crossref Funder ID 2024A1515012537 ; Shenzhen Municipal Science and Technology Innovation Council https://doi.org/10.13039/501100015805 Crossref Funder ID 20231114150312001
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Bundled Publication of Datasets; Collection
Format application/zip
Size 3 datasets
Discipline Earth System Research
Spatial Coverage (-127.783W, -41.136S, 158.498E, 67.225N)
Temporal Coverage Begin 1982-11-19T00:00:00Z
Temporal Coverage End 1999-03-10T00:00:00Z