Articles | Volume 19, issue 2
https://doi.org/10.5194/bg-19-455-2022
https://doi.org/10.5194/bg-19-455-2022
Research article
 | 
28 Jan 2022
Research article |  | 28 Jan 2022

Mixed layer depth dominates over upwelling in regulating the seasonality of ecosystem functioning in the Peruvian upwelling system

Tianfei Xue, Ivy Frenger, A. E. Friederike Prowe, Yonss Saranga José, and Andreas Oschlies

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Cited articles

Albert, A., Echevin, V., Lévy, M., and Aumont, O.: Impact of nearshore wind stress curl on coastal circulation and primary productivity in the Peru upwelling system, J. Geophys. Res.-Oceans, 115, C12, https://doi.org/10.1029/2010JC006569, 2010. a
Andersen, V., Nival, P., and Harris, R. P.: Modelling of a planktonic ecosystem in an enclosed water column, J. Mar. Biol. Assoc. UK, 67, 407–430, 1987. a
Anderson, T. R., Gentleman, W. C., and Sinha, B.: Influence of grazing formulations on the emergent properties of a complex ecosystem model in a global ocean general circulation model, Prog. Oceanogr., 87, 201–213, 2010. a
Aumont, O., Ethé, C., Tagliabue, A., Bopp, L., and Gehlen, M.: PISCES-v2: an ocean biogeochemical model for carbon and ecosystem studies, Geosci. Model Dev., 8, 2465–2513, https://doi.org/10.5194/gmd-8-2465-2015, 2015. a
Bakun, A.: Coastal upwelling indices, west coast of North America, 1946–71, NOAA Technical Report NMFS SSRF-671, 1973. a
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The Peruvian system supports 10 % of the world's fishing yield. In the Peruvian system, wind and earth’s rotation bring cold, nutrient-rich water to the surface and allow phytoplankton to grow. But observations show that it grows worse at high upwelling. Using a model, we find that high upwelling happens when air mixes the water the most. Then phytoplankton is diluted and grows slowly due to low light and cool upwelled water. This study helps to estimate how it might change in a warming climate.
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