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Biogeosciences An interactive open-access journal of the European Geosciences Union
Biogeosciences, 14, 1349-1364, 2017
https://doi.org/10.5194/bg-14-1349-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
20 Mar 2017
Linking diverse nutrient patterns to different water masses within anticyclonic eddies in the upwelling system off Peru
Yonss Saranga José, Heiner Dietze, and Andreas Oschlies GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Abstract. Ocean eddies can both trigger mixing (during their formation and decay) and effectively shield water encompassed from being exchanged with ambient water (throughout their lifetimes). These antagonistic effects of eddies complicate the interpretation of synoptic snapshots typically obtained by ship-based oceanographic measurement campaigns. Here we use a coupled physical–biogeochemical model to explore biogeochemical dynamics within anticyclonic eddies in the eastern tropical South Pacific Ocean. The goal is to understand the diverse biogeochemical patterns that have been observed at the subsurface layers of the anticyclonic eddies in this region. Our model results suggest that the diverse subsurface nutrient patterns within eddies are associated with the presence of water masses of different origins at different depths.

Citation: José, Y. S., Dietze, H., and Oschlies, A.: Linking diverse nutrient patterns to different water masses within anticyclonic eddies in the upwelling system off Peru, Biogeosciences, 14, 1349-1364, https://doi.org/10.5194/bg-14-1349-2017, 2017.
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Short summary
This study aims to investigate the diverse subsurface nutrient patterns observed within anticyclonic eddies in the upwelling system off Peru. Two simulated anticyclonic eddies with opposing subsurface nitrate concentrations were analysed. The results show that diverse nutrient patterns within anticyclonic eddies are related to the presence of water mass from different origins at different depths, responding to variations in depth of the circulation strength at the edge of the eddy.
This study aims to investigate the diverse subsurface nutrient patterns observed within...
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