Sea ice suppression of CO2 outgassing in the West Antarctic Peninsula: implications for the evolving Southern Ocean carbon sink
The Southern Ocean plays an important role in the uptake of atmospheric CO2. In seasonally ice-covered regions, estimates of air-sea exchange remain uncertain in part because of a lack of observations outside the summer season. Here we present new estimates of air-sea CO2 flux in the West Antarctic...
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Language: | English |
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Amer Geophysical Union
2021
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ftunivtasmania:oai:eprints.utas.edu.au:46858 2023-05-15T13:43:28+02:00 Sea ice suppression of CO2 outgassing in the West Antarctic Peninsula: implications for the evolving Southern Ocean carbon sink Shadwick, EH De Meo, OA Schroeter, S Arroyo, MC Martinson, DG Ducklow, H 2021 application/pdf https://eprints.utas.edu.au/46858/ https://eprints.utas.edu.au/46858/1/150359%20-%20Sea%20ice%20suppression%20of%20CO2%20outgassing%20in%20the%20West%20Antarctic%20Peninsula.pdf en eng Amer Geophysical Union https://eprints.utas.edu.au/46858/1/150359%20-%20Sea%20ice%20suppression%20of%20CO2%20outgassing%20in%20the%20West%20Antarctic%20Peninsula.pdf Shadwick, EH, De Meo, OA, Schroeter, S, Arroyo, MC, Martinson, DG and Ducklow, H 2021 , 'Sea ice suppression of CO2 outgassing in the West Antarctic Peninsula: implications for the evolving Southern Ocean carbon sink' , Geophysical Research Letters, vol. 48, no. 11 , pp. 1-10 , doi:10.1029/2020GL091835 <http://dx.doi.org/10.1029/2020GL091835>. Southern Ocean sea ice CO2 carbon sink Article PeerReviewed 2021 ftunivtasmania https://doi.org/10.1029/2020GL091835 2022-08-22T22:16:41Z The Southern Ocean plays an important role in the uptake of atmospheric CO2. In seasonally ice-covered regions, estimates of air-sea exchange remain uncertain in part because of a lack of observations outside the summer season. Here we present new estimates of air-sea CO2 flux in the West Antarctic Peninsula (WAP) from an autonomous mooring on the continental shelf. In summer, the WAP is a sink for atmospheric CO2 followed by a slow return to atmospheric equilibrium in autumn and winter. Outgassing is almost entirely suppressed by ice cover from June through October, resulting in a modest net annual CO2 sink. Model projections indicate sea ice formation will occur later in the season in the coming decades potentially weakening the net oceanic CO2 sink. Interannual variability in the WAP is significant, highlighting the importance of sustained observations of air-sea exchange in this rapidly changing region of the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Sea ice Southern Ocean University of Tasmania: UTas ePrints Antarctic Southern Ocean Antarctic Peninsula Geophysical Research Letters 48 11 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Southern Ocean sea ice CO2 carbon sink |
spellingShingle |
Southern Ocean sea ice CO2 carbon sink Shadwick, EH De Meo, OA Schroeter, S Arroyo, MC Martinson, DG Ducklow, H Sea ice suppression of CO2 outgassing in the West Antarctic Peninsula: implications for the evolving Southern Ocean carbon sink |
topic_facet |
Southern Ocean sea ice CO2 carbon sink |
description |
The Southern Ocean plays an important role in the uptake of atmospheric CO2. In seasonally ice-covered regions, estimates of air-sea exchange remain uncertain in part because of a lack of observations outside the summer season. Here we present new estimates of air-sea CO2 flux in the West Antarctic Peninsula (WAP) from an autonomous mooring on the continental shelf. In summer, the WAP is a sink for atmospheric CO2 followed by a slow return to atmospheric equilibrium in autumn and winter. Outgassing is almost entirely suppressed by ice cover from June through October, resulting in a modest net annual CO2 sink. Model projections indicate sea ice formation will occur later in the season in the coming decades potentially weakening the net oceanic CO2 sink. Interannual variability in the WAP is significant, highlighting the importance of sustained observations of air-sea exchange in this rapidly changing region of the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Shadwick, EH De Meo, OA Schroeter, S Arroyo, MC Martinson, DG Ducklow, H |
author_facet |
Shadwick, EH De Meo, OA Schroeter, S Arroyo, MC Martinson, DG Ducklow, H |
author_sort |
Shadwick, EH |
title |
Sea ice suppression of CO2 outgassing in the West Antarctic Peninsula: implications for the evolving Southern Ocean carbon sink |
title_short |
Sea ice suppression of CO2 outgassing in the West Antarctic Peninsula: implications for the evolving Southern Ocean carbon sink |
title_full |
Sea ice suppression of CO2 outgassing in the West Antarctic Peninsula: implications for the evolving Southern Ocean carbon sink |
title_fullStr |
Sea ice suppression of CO2 outgassing in the West Antarctic Peninsula: implications for the evolving Southern Ocean carbon sink |
title_full_unstemmed |
Sea ice suppression of CO2 outgassing in the West Antarctic Peninsula: implications for the evolving Southern Ocean carbon sink |
title_sort |
sea ice suppression of co2 outgassing in the west antarctic peninsula: implications for the evolving southern ocean carbon sink |
publisher |
Amer Geophysical Union |
publishDate |
2021 |
url |
https://eprints.utas.edu.au/46858/ https://eprints.utas.edu.au/46858/1/150359%20-%20Sea%20ice%20suppression%20of%20CO2%20outgassing%20in%20the%20West%20Antarctic%20Peninsula.pdf |
geographic |
Antarctic Southern Ocean Antarctic Peninsula |
geographic_facet |
Antarctic Southern Ocean Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Sea ice Southern Ocean |
op_relation |
https://eprints.utas.edu.au/46858/1/150359%20-%20Sea%20ice%20suppression%20of%20CO2%20outgassing%20in%20the%20West%20Antarctic%20Peninsula.pdf Shadwick, EH, De Meo, OA, Schroeter, S, Arroyo, MC, Martinson, DG and Ducklow, H 2021 , 'Sea ice suppression of CO2 outgassing in the West Antarctic Peninsula: implications for the evolving Southern Ocean carbon sink' , Geophysical Research Letters, vol. 48, no. 11 , pp. 1-10 , doi:10.1029/2020GL091835 <http://dx.doi.org/10.1029/2020GL091835>. |
op_doi |
https://doi.org/10.1029/2020GL091835 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
11 |
_version_ |
1766189340005761024 |