Articles | Volume 12, issue 4
https://doi.org/10.5194/bg-12-1113-2015
https://doi.org/10.5194/bg-12-1113-2015
Research article
 | 
24 Feb 2015
Research article |  | 24 Feb 2015

What prevents nitrogen depletion in the oxygen minimum zone of the eastern tropical South Pacific?

B. Su, M. Pahlow, H. Wagner, and A. Oschlies

Related authors

Box-modelling of the impacts of atmospheric nitrogen deposition and benthic remineralisation on the nitrogen cycle of the eastern tropical South Pacific
Bei Su, Markus Pahlow, and Andreas Oschlies
Biogeosciences, 13, 4985–5001, https://doi.org/10.5194/bg-13-4985-2016,https://doi.org/10.5194/bg-13-4985-2016, 2016
Short summary

Related subject area

Biogeochemistry: Open Ocean
Sedimentary organic matter signature hints at the phytoplankton-driven biological carbon pump in the central Arabian Sea
Medhavi Pandey, Haimanti Biswas, Daniel Birgel, Nicole Burdanowitz, and Birgit Gaye
Biogeosciences, 21, 4681–4698, https://doi.org/10.5194/bg-21-4681-2024,https://doi.org/10.5194/bg-21-4681-2024, 2024
Short summary
Hydrological cycle amplification imposes spatial patterns on the climate change response of ocean pH and carbonate chemistry
Allison Hogikyan and Laure Resplandy
Biogeosciences, 21, 4621–4636, https://doi.org/10.5194/bg-21-4621-2024,https://doi.org/10.5194/bg-21-4621-2024, 2024
Short summary
Assessing the tropical Atlantic biogeochemical processes in the Norwegian Earth System Model
Shunya Koseki, Lander R. Crespo, Jerry Tjiputra, Filippa Fransner, Noel S. Keenlyside, and David Rivas
Biogeosciences, 21, 4149–4168, https://doi.org/10.5194/bg-21-4149-2024,https://doi.org/10.5194/bg-21-4149-2024, 2024
Short summary
Evolution of oxygen and stratification and their relationship in the North Pacific Ocean in CMIP6 Earth system models
Lyuba Novi, Annalisa Bracco, Takamitsu Ito, and Yohei Takano
Biogeosciences, 21, 3985–4005, https://doi.org/10.5194/bg-21-3985-2024,https://doi.org/10.5194/bg-21-3985-2024, 2024
Short summary
Evaluation of CMIP6 model performance in simulating historical biogeochemistry across the southern South China Sea
Winfred Marshal, Jing Xiang Chung, Nur Hidayah Roseli, Roswati Md Amin, and Mohd Fadzil Bin Mohd Akhir
Biogeosciences, 21, 4007–4035, https://doi.org/10.5194/bg-21-4007-2024,https://doi.org/10.5194/bg-21-4007-2024, 2024
Short summary

Cited articles

Anderson, L. A. and Sarmiento, J. L.: Redfield ratios of remineralization determined by nutrient data analysis, Global Biogeochem. Cy., 8, 65–80, https://doi.org/10.1029/93GB03318, 1994.
Bethoux, J. P.: Oxygen consumption, new production, vertical advection and environmental evolution in the Mediterranean Sea, Deep-Sea Res., 36, 769–781, https://doi.org/10.1016/0198-0149(89)90150-7, 1989.
Bianchi, D, Dunne,J. P., Sarmiento, J. L. and Galbraith,E. D.: Data-based estimates of suboxia, denitrification, and N2O production in the ocean and their sensitivities to dissolved O2, Global Biogeochem. Cy., 26,1–13, https://doi.org/10.1029/2011GB004209, 2012.
Breitbarth, E, Oschlies, A. and LaRoche, J.: Physiological constrains on the global distribution of Trichodesmium-effect of temperature on diazotropy, Biogeosciences, 4, 53–61, https://doi.org/10.5194/bg-4-53-2007, 2007.
Bulow, S. E., Rich, J. J., Naik, H. S., Pratihary, A. K., and Ward, B. B.: Denitrification exceeds anammox as a nitrogen loss pathway in the Arabian Sea oxygen minimum zone, Deep-Sea Res. Pt. I, 57, 384–393, https://doi.org/10.1016/j.dsr.2009.10.014, 2010.
Download
Short summary
A box model of the eastern tropical South Pacific oxygen minimum zone suggests that anaerobic water-column remineralization rates have to be slower than aerobic remineralization in order to explain the relatively high values of observed nitrate concentrations. Lateral oxygen supply sufficient to oxidize about one-fifth of the export production is required to prevent an anoxic deep ocean. Under these circumstances, the region can be a net source of fixed nitrogen to the surrounding ocean.
Altmetrics
Final-revised paper
Preprint