Storm‐Driven pCO2 Feedback Weakens the Response of Air‐Sea CO2 Fluxes in the Sub‐Antarctic Southern Ocean
Abstract The sub‐seasonal CO2 flux (FCO2) variability across the Southern Ocean is poorly understood due to sparse observations at the required temporal and spatial scales. Twinned surface and profiling gliders experiments were used to investigate how storms influence FCO2 through the air‐sea gradie...
Published in: | Geophysical Research Letters |
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Online Access: | https://doi.org/10.1029/2023GL107804 https://doaj.org/article/84cbd196dc364197858458250cf67a3a |
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ftdoajarticles:oai:doaj.org/article:84cbd196dc364197858458250cf67a3a 2024-09-09T19:10:03+00:00 Storm‐Driven pCO2 Feedback Weakens the Response of Air‐Sea CO2 Fluxes in the Sub‐Antarctic Southern Ocean Tesha Toolsee Sarah‐Anne Nicholson Pedro M. S. Monteiro 2024-05-01T00:00:00Z https://doi.org/10.1029/2023GL107804 https://doaj.org/article/84cbd196dc364197858458250cf67a3a EN eng Wiley https://doi.org/10.1029/2023GL107804 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL107804 https://doaj.org/article/84cbd196dc364197858458250cf67a3a Geophysical Research Letters, Vol 51, Iss 9, Pp n/a-n/a (2024) Wave Glider Southern Ocean air‐sea CO2 flux storms Geophysics. Cosmic physics QC801-809 article 2024 ftdoajarticles https://doi.org/10.1029/2023GL107804 2024-08-05T17:49:23Z Abstract The sub‐seasonal CO2 flux (FCO2) variability across the Southern Ocean is poorly understood due to sparse observations at the required temporal and spatial scales. Twinned surface and profiling gliders experiments were used to investigate how storms influence FCO2 through the air‐sea gradient in partial pressure of CO2 (ΔpCO2) in the sub‐Antarctic zone. Winter‐spring storms caused ΔpCO2 to weaken (by 22–37 μatm) due to mixing/entrainment and weaker stratification. This weakening in ΔpCO2 was in phase with the increase in wind stress resulting in a reduction of the storm‐driven CO2 uptake by 6%–27%. During summer, stronger stratification explained the weaker sensitivity of ΔpCO2 to storms, instead temperature changes dominated the ΔpCO2 variability. These results highlight the importance of observing synoptic‐scale variability in ΔpCO2, the absence of which may propagate significant biases to the mean annual FCO2 estimates from large‐scale observing programmes and reconstructions. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean Geophysical Research Letters 51 9 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Wave Glider Southern Ocean air‐sea CO2 flux storms Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Wave Glider Southern Ocean air‐sea CO2 flux storms Geophysics. Cosmic physics QC801-809 Tesha Toolsee Sarah‐Anne Nicholson Pedro M. S. Monteiro Storm‐Driven pCO2 Feedback Weakens the Response of Air‐Sea CO2 Fluxes in the Sub‐Antarctic Southern Ocean |
topic_facet |
Wave Glider Southern Ocean air‐sea CO2 flux storms Geophysics. Cosmic physics QC801-809 |
description |
Abstract The sub‐seasonal CO2 flux (FCO2) variability across the Southern Ocean is poorly understood due to sparse observations at the required temporal and spatial scales. Twinned surface and profiling gliders experiments were used to investigate how storms influence FCO2 through the air‐sea gradient in partial pressure of CO2 (ΔpCO2) in the sub‐Antarctic zone. Winter‐spring storms caused ΔpCO2 to weaken (by 22–37 μatm) due to mixing/entrainment and weaker stratification. This weakening in ΔpCO2 was in phase with the increase in wind stress resulting in a reduction of the storm‐driven CO2 uptake by 6%–27%. During summer, stronger stratification explained the weaker sensitivity of ΔpCO2 to storms, instead temperature changes dominated the ΔpCO2 variability. These results highlight the importance of observing synoptic‐scale variability in ΔpCO2, the absence of which may propagate significant biases to the mean annual FCO2 estimates from large‐scale observing programmes and reconstructions. |
format |
Article in Journal/Newspaper |
author |
Tesha Toolsee Sarah‐Anne Nicholson Pedro M. S. Monteiro |
author_facet |
Tesha Toolsee Sarah‐Anne Nicholson Pedro M. S. Monteiro |
author_sort |
Tesha Toolsee |
title |
Storm‐Driven pCO2 Feedback Weakens the Response of Air‐Sea CO2 Fluxes in the Sub‐Antarctic Southern Ocean |
title_short |
Storm‐Driven pCO2 Feedback Weakens the Response of Air‐Sea CO2 Fluxes in the Sub‐Antarctic Southern Ocean |
title_full |
Storm‐Driven pCO2 Feedback Weakens the Response of Air‐Sea CO2 Fluxes in the Sub‐Antarctic Southern Ocean |
title_fullStr |
Storm‐Driven pCO2 Feedback Weakens the Response of Air‐Sea CO2 Fluxes in the Sub‐Antarctic Southern Ocean |
title_full_unstemmed |
Storm‐Driven pCO2 Feedback Weakens the Response of Air‐Sea CO2 Fluxes in the Sub‐Antarctic Southern Ocean |
title_sort |
storm‐driven pco2 feedback weakens the response of air‐sea co2 fluxes in the sub‐antarctic southern ocean |
publisher |
Wiley |
publishDate |
2024 |
url |
https://doi.org/10.1029/2023GL107804 https://doaj.org/article/84cbd196dc364197858458250cf67a3a |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Geophysical Research Letters, Vol 51, Iss 9, Pp n/a-n/a (2024) |
op_relation |
https://doi.org/10.1029/2023GL107804 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL107804 https://doaj.org/article/84cbd196dc364197858458250cf67a3a |
op_doi |
https://doi.org/10.1029/2023GL107804 |
container_title |
Geophysical Research Letters |
container_volume |
51 |
container_issue |
9 |
_version_ |
1809824433949376512 |