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Nitrous oxide variability at sub-kilometre resolution in the Atlantic sector of the Southern Ocean

Grefe, Imke; Fielding, Sophie; Heywood, Karen J.; Kaiser, Jan. 2017 Nitrous oxide variability at sub-kilometre resolution in the Atlantic sector of the Southern Ocean. Biogeosciences Discussions. 17, pp. https://doi.org/10.5194/bg-2017-73 (In Press)

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Abstract/Summary

The Southern Ocean is an important region for global nitrous oxide (N2O) cycling. The contribution of different source and sink mechanisms is, however, not very well constrained due to a scarcity of seawater data from the area. Here we present high-resolution surface N2O measurements from the Atlantic sector of the Southern Ocean, taking advantage of a relatively new underway setup allowing for collection of data during transit across mesoscale features such as frontal systems and eddies. Covering a range of different environments and biogeochemical settings, N2O saturations and sea-to-air flux were highly variable: Saturations ranged from 96.5 % at the sea ice edge in the Weddell Sea to 126.1 % across the Polar Frontal Zone during transit to South Georgia. Negative sea-to-air fluxes of up to −1.3 µmol m−2 d−1 were observed in the Subantarctic Zone and highest positive fluxes of 14.5 µmol m−2 d−1 in Stromness Bay, coastal South Georgia.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.5194/bg-2017-73
Programmes: BAS Programmes > BAS Programmes 2015 > Ecosystems
ISSN: 1810-6285
Date made live: 29 Mar 2017 12:37 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/516714

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