Articles | Volume 13, issue 4
https://doi.org/10.5194/bg-13-1105-2016
https://doi.org/10.5194/bg-13-1105-2016
Research article
 | 
23 Feb 2016
Research article |  | 23 Feb 2016

Influence of mesoscale eddies on the distribution of nitrous oxide in the eastern tropical South Pacific

Damian L. Arévalo-Martínez, Annette Kock, Carolin R. Löscher, Ruth A. Schmitz, Lothar Stramma, and Hermann W. Bange

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Cited articles

Altabet, M. A., Ryabenko, E., Stramma, L., Wallace, D. W. R., Frank, M., Grasse, P., and Lavik, G.: An eddy-stimulated hotspot for fixed nitrogen-loss from the Peru oxygen minimum zone, Biogeosciences, 9, 4897–4908, https://doi.org/10.5194/bg-9-4897-2012, 2012.
Arévalo-Martínez, D. L., Beyer, M., Krumbholz, M., Piler, I., Kock, A., Steinhoff, T., Körtzinger, A., and Bange, H. W.: A new method for continuous measurements of oceanic and atmospheric N2O, CO and CO2: performance of off-axis integrated cavity output spectroscopy (OA-ICOS) coupled to non-dispersive infrared detection (NDIR), Ocean Sci., 9, 1071–1087, https://doi.org/10.5194/os-9-1071-2013, 2013.
Arévalo-Martínez, D. L., Kock, A., Löscher, C. R., Schmitz, R. A., and Bange, H. W.: Massive nitrous oxide emissions from the tropical South Pacific Ocean, Nat. Geosci., 8, 530–533, https://doi.org/10.1038/ngeo2469, 2015.
Babbin, A. R., Keil, R. G., Devol, A. H., and Ward, B.: Organic matter stoichiometry, flux, and oxygen control nitrogen loss in the ocean, Science, 344, 406–408, 2014.
Bakker, D. C. E., Bange, H. W., Gruber, N., Johannenssen, T., Upsill-Goddard, R. C., Borges, A. V., Delille, B., Löscher, C. R., Naqvi, S. W. A., Omar, A. O., and Santana-Casiano, J. M.: Air-sea interactions of natural long-lived greenhouse gases (CO2, N2O, CH4) in a changing climate, in: Ocean-atmosphere interactions of gases and particles, edited by: Liss, P. S. and Johnson, M. T., 113–169, Springer, Heidelberg, Germany, 2014.
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We present the first measurements of N2O across three mesoscale eddies in the eastern tropical South Pacific. Eddie's vertical structure, offshore transport, properties during its formation and near-surface primary production determined the N2O distribution. Substantial depletion of N2O within the core of anticyclonic eddies suggests that although these are transient features, N-loss processes within their centres can lead to an enhanced N2O sink which is not accounted for in marine N2O budgets.
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