Articles | Volume 20, issue 15
https://doi.org/10.5194/bg-20-3229-2023
https://doi.org/10.5194/bg-20-3229-2023
Research article
 | 
07 Aug 2023
Research article |  | 07 Aug 2023

Seasonal variability of nitrous oxide concentrations and emissions in a temperate estuary

Gesa Schulz, Tina Sanders, Yoana G. Voynova, Hermann W. Bange, and Kirstin Dähnke

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Cited articles

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. 
Bange, H. W.: Nitrous oxide and methane in European coastal waters, Estuar. Coast. Shelf S., 70, 361–374, https://doi.org/10.1016/j.ecss.2006.05.042, 2006. 
Bange, H. W.: Gaseous Nitrogen Compounds (NO, N2O, N2, NH3) in the Ocean, Chap. 2, in: Nitrogen in the Marine Environment, 2nd Edn., edited by: Capone, D. G., Bronk, D. A., Mulholland, M. R., and Carpenter, E. J., https://doi.org/10.1016/B978-0-12-372522-6.00002-5, 51–94, ISBN 9780123725226, 2008. 
Barnes, J. and Owens, N. J. P.: Denitrification and Nitrous Oxide Concentrations in the Humber Estuary, UK, and Adjacent Coastal Zones, Mar. Pollut. Bull., 37, 247–260, https://doi.org/10.1016/S0025-326X(99)00079-X, 1999. 
Barnes, J. and Upstill-Goddard, R. C.: N2O seasonal distributions and air–sea exchange in UK estuaries: Implications for the tropospheric N2O source from European coastal waters, J. Geophys. Res.-Biogeo., 116, G01006, https://doi.org/10.1029/2009JG001156, 2011. 
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Short summary
Nitrous oxide (N2O) is an important greenhouse gas. However, N2O emissions from estuaries underlie significant uncertainties due to limited data availability and high spatiotemporal variability. We found the Elbe Estuary (Germany) to be a year-round source of N2O, with the highest emissions in winter along with high nitrogen loads. However, in spring and summer, N2O emissions did not decrease alongside lower nitrogen loads because organic matter fueled in situ N2O production along the estuary.
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