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https://doi.org/10.5194/bgd-1-709-2004
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  19 Oct 2004

19 Oct 2004

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This discussion paper is a preprint. A revision of the manuscript for further review has not been submitted.

Hydroxylamine (NH2OH) in the Baltic Sea

S. Gebhardt1, S. Walter1, G. Nausch2, and H. W. Bange1 S. Gebhardt et al.
  • 1Forschungsbereich Marine Biogeochemie, Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR), Düsternbrooker Weg 20, 24105 Kiel, Germany
  • 2Leibniz-Institut für Ostseeforschung Warnemünde, Seestr. 15, 18119 Rostock, Germany

Abstract. The vertical distribution of dissolved hydroxylamine (NH2OH) was measured for the first time at 10 stations in the western, southern and central Baltic Sea during a cruise in February 2004. The distribution of dissolved NH2OH was complex due to the interplay of in-situ production in the shallow western and southern Baltic Sea and the hydrographical setting in the central Baltic Sea caused by the major North Sea water inflow event in January 2003. We conclude that nitrification might be the major source of NH2OH, whereas anaerobic ammonium oxidation (anammox) appeared to be negligible. We suggest that a "fresh" nitrifying system, in which the NH+4-oxidation rates exceeded the NO2-oxidation rates, favoured the build-up of NH2OH.

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S. Gebhardt et al.
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