Ocean Science
Ocean Science
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Articles | Volume 17, issue 5
Articles | Volume 17, issue 5
https://doi.org/10.5194/os-17-1385-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-17-1385-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 5
Research article
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06 Oct 2021
Research article | Highlight paper |  | 06 Oct 2021

Interannual variability in contributions of the Equatorial Undercurrent (EUC) to Peruvian upwelling source water

Gandy Maria Rosales Quintana, Robert Marsh, and Luis Alfredo Icochea Salas

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Short summary
The Equatorial Undercurrent (EUC) is a key influence on upwelling of nutrient-rich waters associated ecosystems off Peru. To quantify this influence, we backtrack upwelling waters in a computer model of ocean currents, annually, over 1989–2007. The EUC influence varies from year to year, dominating in warm El Niño years, when the EUC extends much closer to the Peruvian coast. In other years, more local upwelling is associated with coastal winds, coincident with major key population shifts.
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