Articles | Volume 13, issue 19
https://doi.org/10.5194/bg-13-5649-2016
https://doi.org/10.5194/bg-13-5649-2016
Research article
 | 
11 Oct 2016
Research article |  | 11 Oct 2016

Nitrite consumption and associated isotope changes during a river flood event

Juliane Jacob, Tina Sanders, and Kirstin Dähnke

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Cited articles

Baborowski, M., von Tümpling Jr., W., and Friese, K.: Behaviour of suspended particulate matter (SPM) and selected trace metals during the 2002 summer flood in the River Elbe (Germany) at Magdeburg monitoring station, Hydrol. Earth Syst. Sci., 8, 135–150, https://doi.org/10.5194/hess-8-135-2004, 2004.
Bergemann, M. and Gaumert, T.: Gewässergütebericht der Elbe 2006, ARGE Elbe, Hamburg, Germany, 2008.
Beyn, F., Matthias, V., and Dähnke, K.: Changes in atmospheric nitrate deposition in Germany – An isotopic perspective, Environ. Pollut., 194, 1–10, 2014.
Böhlke, J. K., Smith, R. L., and Hannon, J. E.: Isotopic analysis of N and O in nitrite and nitrate by sequential selective bacterial reduction to N2O, Anal. Chem., 79, 5888–5895, 2007.
Brandes, J. A. and Devol, A. H.: Isotopic fractionation of oxygen and nitrogen in coastal marine sediments, Geochim. Cosmochim. Ac., 61, 1793–1801, 1997.
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Short summary
During a flood in the Elbe in June 2013, a unique co-occurrence of ammonium, nitrite and nitrate in the water column was found. SPM and nutrient concentrations as well as isotopes were analysed. We calculated an isotope effect 15ε of −10.0 ± 0.1 ‰ during net nitrite and 15ε of −4.0 ± 0.1 ‰ and 18ε of −5.3 ± 0.1 ‰ during net nitrate consumption. A simple box-model calculation results in combined riparian denitrification and 22 to 36 % nitrification.
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