Biogeosciences
Biogeosciences
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Articles | Volume 22, issue 16
Articles | Volume 22, issue 16
https://doi.org/10.5194/bg-22-4261-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-4261-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 16
Research article
 | 
28 Aug 2025
Research article |  | 28 Aug 2025

Evolution of biogeochemical properties inside poleward undercurrent eddies in the southeast Pacific Ocean

Lenna Ortiz-Castillo, Oscar Pizarro, Marcela Cornejo-D'Ottone, and Boris Dewitte

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Latest update: 20 May 2026
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Short summary
Poleward undercurrent eddies (Puddies) transport the source water mass with low oxygen hundreds of kilometers away from the coast. A simulation based on a physical–biogeochemical model was used to characterize the average biogeochemical conditions inside the Puddies during their lifetime while modifying the conditions in the open sea. Our findings show that the biological activity extends the low-oxygen core conditions counteracted by advection processes that tend to ventilate the core.
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