Articles | Volume 20, issue 2
https://doi.org/10.5194/bg-20-325-2023
https://doi.org/10.5194/bg-20-325-2023
Research article
 | 
19 Jan 2023
Research article |  | 19 Jan 2023

Nitrite cycling in the primary nitrite maxima of the eastern tropical North Pacific

Nicole M. Travis, Colette L. Kelly, Margaret R. Mulholland, and Karen L. Casciotti

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Cited articles

Al-Qutob, M., Häse, C., Tilzer, M. M., and Lazar, B.: Phytoplankton drives nitrite dynamics in the Gulf of Aqaba, Red Sea, Mar. Ecol.-Prog. Ser., 239, 233–239, https://doi.org/10.3354/meps239233, 2002. 
Anderson, S. and Roels, O.: Effects of light intensity on nitrate and nitrite uptake and excretion by Chaetoceros curvisetus, Mar. Biol., 62, 257–261, https://doi.org/10.1007/BF00397692, 1981. 
Babbin, A. R., Boles, E. L., Mühle, J., and Weiss, R. F.: On the natural spatio-temporal heterogeneity of South Pacific nitrous oxide, Nat. Commun., 11, 1–9, https://doi.org/10.1038/s41467-020-17509-6, 2020. 
Beman, J. M., Popp, B. N., and Francis, C. A.: Molecular and biogeochemical evidence for ammonia oxidation by marine Crenarchaeota in the Gulf of California, ISME J., 2, 429–441, https://doi.org/10.1038/ismej.2007.118, 2008. 
Beman, J. M., Popp, B. N., and Alford, S. E.: Quantification of ammonia oxidation rates and ammonia-oxidizing archaea and bacteria at high resolution in the Gulf of California and eastern tropical North Pacific Ocean, Limnol. Oceanogr., 57, 711–726, https://doi.org/10.4319/lo.2012.57.3.0711, 2012. 
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Short summary
The primary nitrite maximum is a ubiquitous upper ocean feature where nitrite accumulates, but we still do not understand its formation and the co-occurring microbial processes involved. Using correlative methods and rates measurements, we found strong spatial patterns between environmental conditions and depths of the nitrite maxima, but not the maximum concentrations. Nitrification was the dominant source of nitrite, with occasional high nitrite production from phytoplankton near the coast.
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