Articles | Volume 21, issue 14
https://doi.org/10.5194/bg-21-3425-2024
https://doi.org/10.5194/bg-21-3425-2024
Research article
 | 
30 Jul 2024
Research article |  | 30 Jul 2024

Dissolved nitric oxide in the lower Elbe Estuary and the Port of Hamburg area

Riel Carlo O. Ingeniero, Gesa Schulz, and Hermann W. Bange

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Cited articles

Abada, A., Beiralas, R., Narvaez, D., Sperfeld, M., Duchin-Rapp, Y., Lipsman, V., Yuda, L., Cohen, B., Carmieli, R., Ben-Dor, S., Rocha, J., Huang Zhang, I., Babbin, A. R., and Segev, E.: Aerobic bacteria produce nitric oxide via denitrification and promote algal population collapse, ISME J., 17, 1167–1183, https://doi.org/10.1038/s41396-023-01427-8, 2023. 
Adesina, A. O. and Sakugawa, H.: Photochemically generated nitric oxide in seawater: The peroxynitrite sink and its implications for daytime air quality, Sci. Total Environ., 781, 146683, https://doi.org/10.1016/j.scitotenv.2021.146683, 2021. 
Amann, T., Weiss, A., and Hartmann, J.: Carbon dynamics in the freshwater part of the Elbe estuary, Germany: Implications of improving water quality, Estuar. Coast Shelf S., 107, 112–121, https://doi.org/10.1016/j.ecss.2012.05.012, 2012. 
Anifowose, A. J. and Sakugawa, H.: Determination of daytime flux of nitric oxide radical (NO) at an inland sea–atmospheric boundary in japan, J. Aquat. Pollut. Toxicol., 1, 1–6, 2017. 
Anifowose, A. J., Takeda, K., and Sakugawa, H.: Photoformation rate, steady-state concentration and lifetime of nitric oxide radical (NO) in a eutrophic river in Higashi-Hiroshima, Japan, Chemosphere, 119, 302–309, https://doi.org/10.1016/j.chemosphere.2014.06.063, 2015. 
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Our research is the first to measure dissolved NO concentrations in temperate estuarine waters, providing insights into its distribution under varying conditions and enhancing our understanding of its production processes. Dissolved NO was supersaturated in the Elbe Estuary, indicating that it is a source of atmospheric NO. The observed distribution of dissolved NO most likely resulted from nitrification.
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