Intense oceanic uptake of oxygen during 2014-2015 winter convection in the Labrador Sea
Measurements of near-surface oxygen (O2) concentrations and mixed layer depth from the K1 mooring in the central Labrador Sea are used to calculate the change in column-integrated (0–1700 m) O2 content over the deep convection winter 2014/2015. During the mixed layer deepening period, November 2014...
Published in: | Geophysical Research Letters |
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AGU (American Geophysical Union)
2017
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Online Access: | https://oceanrep.geomar.de/id/eprint/39161/ https://oceanrep.geomar.de/id/eprint/39161/1/Koelling_et_al-2017-Geophysical_Research_Letters.pdf https://oceanrep.geomar.de/id/eprint/39161/2/grl56204-sup-0001-supplementary.pdf https://doi.org/10.1002/2017GL073933 |
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ftoceanrep:oai:oceanrep.geomar.de:39161 2023-05-15T17:06:01+02:00 Intense oceanic uptake of oxygen during 2014-2015 winter convection in the Labrador Sea Koelling, Jannes Wallace, Douglas W.R. Send, Uwe Karstensen, Johannes 2017-08-16 text https://oceanrep.geomar.de/id/eprint/39161/ https://oceanrep.geomar.de/id/eprint/39161/1/Koelling_et_al-2017-Geophysical_Research_Letters.pdf https://oceanrep.geomar.de/id/eprint/39161/2/grl56204-sup-0001-supplementary.pdf https://doi.org/10.1002/2017GL073933 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/39161/1/Koelling_et_al-2017-Geophysical_Research_Letters.pdf https://oceanrep.geomar.de/id/eprint/39161/2/grl56204-sup-0001-supplementary.pdf Koelling, J., Wallace, D. W. R., Send, U. and Karstensen, J. (2017) Intense oceanic uptake of oxygen during 2014-2015 winter convection in the Labrador Sea. Open Access Geophysical Research Letters, 44 (15). pp. 7855-7864. DOI 10.1002/2017GL073933 <https://doi.org/10.1002/2017GL073933>. doi:10.1002/2017GL073933 info:eu-repo/semantics/openAccess Article PeerReviewed info:eu-repo/semantics/article 2017 ftoceanrep https://doi.org/10.1002/2017GL073933 2023-04-07T15:35:04Z Measurements of near-surface oxygen (O2) concentrations and mixed layer depth from the K1 mooring in the central Labrador Sea are used to calculate the change in column-integrated (0–1700 m) O2 content over the deep convection winter 2014/2015. During the mixed layer deepening period, November 2014 to April 2015, the oxygen content increased by 24.3 ± 3.4 mol m−2, 40% higher than previous results from winters with weaker convection. By estimating the contribution of respiration and lateral transport on the oxygen budget, the cumulative air-sea gas exchange is derived. The O2 uptake of 29.1 ± 3.8 mol m−2, driven by persistent undersaturation (≥5%) and strong atmospheric forcing, is substantially higher than predicted by standard (nonbubble) gas exchange parameterizations, whereas most bubble-resolving parameterizations predict higher uptake, comparable to our results. Generally large but varying mixed layer depths and strong heat and momentum fluxes make the Labrador Sea an ideal test bed for process studies aimed at improving gas exchange parameterizations. Article in Journal/Newspaper Labrador Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Geophysical Research Letters 44 15 7855 7864 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Measurements of near-surface oxygen (O2) concentrations and mixed layer depth from the K1 mooring in the central Labrador Sea are used to calculate the change in column-integrated (0–1700 m) O2 content over the deep convection winter 2014/2015. During the mixed layer deepening period, November 2014 to April 2015, the oxygen content increased by 24.3 ± 3.4 mol m−2, 40% higher than previous results from winters with weaker convection. By estimating the contribution of respiration and lateral transport on the oxygen budget, the cumulative air-sea gas exchange is derived. The O2 uptake of 29.1 ± 3.8 mol m−2, driven by persistent undersaturation (≥5%) and strong atmospheric forcing, is substantially higher than predicted by standard (nonbubble) gas exchange parameterizations, whereas most bubble-resolving parameterizations predict higher uptake, comparable to our results. Generally large but varying mixed layer depths and strong heat and momentum fluxes make the Labrador Sea an ideal test bed for process studies aimed at improving gas exchange parameterizations. |
format |
Article in Journal/Newspaper |
author |
Koelling, Jannes Wallace, Douglas W.R. Send, Uwe Karstensen, Johannes |
spellingShingle |
Koelling, Jannes Wallace, Douglas W.R. Send, Uwe Karstensen, Johannes Intense oceanic uptake of oxygen during 2014-2015 winter convection in the Labrador Sea |
author_facet |
Koelling, Jannes Wallace, Douglas W.R. Send, Uwe Karstensen, Johannes |
author_sort |
Koelling, Jannes |
title |
Intense oceanic uptake of oxygen during 2014-2015 winter convection in the Labrador Sea |
title_short |
Intense oceanic uptake of oxygen during 2014-2015 winter convection in the Labrador Sea |
title_full |
Intense oceanic uptake of oxygen during 2014-2015 winter convection in the Labrador Sea |
title_fullStr |
Intense oceanic uptake of oxygen during 2014-2015 winter convection in the Labrador Sea |
title_full_unstemmed |
Intense oceanic uptake of oxygen during 2014-2015 winter convection in the Labrador Sea |
title_sort |
intense oceanic uptake of oxygen during 2014-2015 winter convection in the labrador sea |
publisher |
AGU (American Geophysical Union) |
publishDate |
2017 |
url |
https://oceanrep.geomar.de/id/eprint/39161/ https://oceanrep.geomar.de/id/eprint/39161/1/Koelling_et_al-2017-Geophysical_Research_Letters.pdf https://oceanrep.geomar.de/id/eprint/39161/2/grl56204-sup-0001-supplementary.pdf https://doi.org/10.1002/2017GL073933 |
genre |
Labrador Sea |
genre_facet |
Labrador Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/39161/1/Koelling_et_al-2017-Geophysical_Research_Letters.pdf https://oceanrep.geomar.de/id/eprint/39161/2/grl56204-sup-0001-supplementary.pdf Koelling, J., Wallace, D. W. R., Send, U. and Karstensen, J. (2017) Intense oceanic uptake of oxygen during 2014-2015 winter convection in the Labrador Sea. Open Access Geophysical Research Letters, 44 (15). pp. 7855-7864. DOI 10.1002/2017GL073933 <https://doi.org/10.1002/2017GL073933>. doi:10.1002/2017GL073933 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2017GL073933 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
15 |
container_start_page |
7855 |
op_container_end_page |
7864 |
_version_ |
1766060913213833216 |