Nitrous oxide variability at sub-kilometre resolution in the Atlantic sector of the Southern Ocean
The Southern Ocean is an important region for global nitrous oxide (N 2 O) 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 N 2 O measurements from the At...
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ftcopernicus:oai:publications.copernicus.org:bgd57718 2023-05-15T18:18:19+02:00 Nitrous oxide variability at sub-kilometre resolution in the Atlantic sector of the Southern Ocean Grefe, Imke Fielding, Sophie Heywood, Karen J. Kaiser, Jan 2018-09-26 application/pdf https://doi.org/10.5194/bg-2017-73 https://www.biogeosciences-discuss.net/bg-2017-73/ eng eng doi:10.5194/bg-2017-73 https://www.biogeosciences-discuss.net/bg-2017-73/ eISSN: 1726-4189 Text 2018 ftcopernicus https://doi.org/10.5194/bg-2017-73 2019-12-24T09:51:35Z The Southern Ocean is an important region for global nitrous oxide (N 2 O) 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 N 2 O 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, N 2 O 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. Text Sea ice Southern Ocean Weddell Sea Copernicus Publications: E-Journals Southern Ocean Stromness ENVELOPE(-36.716,-36.716,-54.156,-54.156) Stromness Bay ENVELOPE(-36.640,-36.640,-54.153,-54.153) Weddell Weddell Sea |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
The Southern Ocean is an important region for global nitrous oxide (N 2 O) 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 N 2 O 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, N 2 O 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. |
format |
Text |
author |
Grefe, Imke Fielding, Sophie Heywood, Karen J. Kaiser, Jan |
spellingShingle |
Grefe, Imke Fielding, Sophie Heywood, Karen J. Kaiser, Jan Nitrous oxide variability at sub-kilometre resolution in the Atlantic sector of the Southern Ocean |
author_facet |
Grefe, Imke Fielding, Sophie Heywood, Karen J. Kaiser, Jan |
author_sort |
Grefe, Imke |
title |
Nitrous oxide variability at sub-kilometre resolution in the Atlantic sector of the Southern Ocean |
title_short |
Nitrous oxide variability at sub-kilometre resolution in the Atlantic sector of the Southern Ocean |
title_full |
Nitrous oxide variability at sub-kilometre resolution in the Atlantic sector of the Southern Ocean |
title_fullStr |
Nitrous oxide variability at sub-kilometre resolution in the Atlantic sector of the Southern Ocean |
title_full_unstemmed |
Nitrous oxide variability at sub-kilometre resolution in the Atlantic sector of the Southern Ocean |
title_sort |
nitrous oxide variability at sub-kilometre resolution in the atlantic sector of the southern ocean |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-2017-73 https://www.biogeosciences-discuss.net/bg-2017-73/ |
long_lat |
ENVELOPE(-36.716,-36.716,-54.156,-54.156) ENVELOPE(-36.640,-36.640,-54.153,-54.153) |
geographic |
Southern Ocean Stromness Stromness Bay Weddell Weddell Sea |
geographic_facet |
Southern Ocean Stromness Stromness Bay Weddell Weddell Sea |
genre |
Sea ice Southern Ocean Weddell Sea |
genre_facet |
Sea ice Southern Ocean Weddell Sea |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-2017-73 https://www.biogeosciences-discuss.net/bg-2017-73/ |
op_doi |
https://doi.org/10.5194/bg-2017-73 |
_version_ |
1766194859564072960 |