Biological nitrous oxide consumption in oxygenated waters of the high latitude Atlantic Ocean

Rees, AP, Brown, IJ, Jayakumar, A, Lessin, G, Somerfield, PJ and Ward, BB 2021 Biological nitrous oxide consumption in oxygenated waters of the high latitude Atlantic Ocean. Communications Earth & Environment, 2 (1).

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Nitrous oxide (N2O) is important to the global radiative budget of the atmosphere and contributes to the depletion of stratospheric ozone. Globally the ocean represents a large net flux of N2O to the atmosphere but the direction of this flux varies regionally. Our understanding of N2O production and consumption processes in the ocean remains incomplete. Traditional understanding tells us that anaerobic denitrification, the reduction of NO3− to N2 with N2O as an intermediate step, is the sole biological means of reducing N2O, a process known to occur in anoxic environments only. Here we present experimental evidence of N2O removal under fully oxygenated conditions, coupled with observations of bacterial communities with novel, atypical gene sequences for N2O reduction. The focus of this work was on the high latitude Atlantic Ocean where we show bacterial consumption sufficient to account for oceanic N2O depletion and the occurrence of regional sinks for atmospheric N2O.

Item Type: Publication - Article
Additional Information. Not used in RCUK Gateway to Research.: Supplementary information The online version contains supplementary material available at Correspondence and requests for materials should be addressed to A.P.R. Peer review information Primary handling editor: Teresa Ortner. Reprints and permission information is available at Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Divisions: Plymouth Marine Laboratory > National Capability categories > Single Centre NC - CLASS
Plymouth Marine Laboratory > Science Areas > Marine Biochemistry and Observations
Depositing User: S Hawkins
Date made live: 24 Feb 2021 10:27
Last Modified: 24 Feb 2021 10:27

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