Open ocean gas transfer velocity derived from long-term direct measurements of the CO2 flux
Open ocean gas transfer velocity derived from long-term direct measurements of the CO2 flux
Air-sea open ocean CO2 flux measurements have been made using the Eddy Covariance (EC) technique onboard the weathership Polarfront in the North Atlantic between September 2006 and December 2009. Flux measurements were made using an autonomous system ‘AutoFlux’. CO2 mass density was measured with an open-path infrared gas analyzer. Following quality control procedures, 3938 20-minute flux measurements were made at mean wind speeds up to 19.6 m/s, significantly higher wind speeds than previously published results. The uncertainty in the determination of gas transfer velocities is large, but the mean relationship to wind speed allows a new parameterisation of the gas transfer velocity to be determined. A cubic dependence of gas transfer on wind speed is found, suggesting a significant influence of bubble-mediated exchange on gas transfer.
Polarfront, gas transfer velocity, air-sea CO2 flux, open-path Licor, AUTOFLUX
L23607
Prytherch, J.
4789a761-e6b1-4b87-8032-cb0ee8a0ea73
Yelland, M.J.
3b2e2a38-334f-430f-b110-253a0a835a07
Moat, B.I.
497dbb18-a98f-466b-b459-aa2c872ad2dc
Skjelvan, I.
4b2ea697-329a-4248-9419-6f9d68d56e2b
Srokosz, M.A.
1e0442ce-679f-43f2-8fe4-9a0f0174d483
4 December 2010
Prytherch, J.
4789a761-e6b1-4b87-8032-cb0ee8a0ea73
Yelland, M.J.
3b2e2a38-334f-430f-b110-253a0a835a07
Moat, B.I.
497dbb18-a98f-466b-b459-aa2c872ad2dc
Skjelvan, I.
4b2ea697-329a-4248-9419-6f9d68d56e2b
Srokosz, M.A.
1e0442ce-679f-43f2-8fe4-9a0f0174d483
Prytherch, J., Yelland, M.J., Moat, B.I., Skjelvan, I. and Srokosz, M.A.
(2010)
Open ocean gas transfer velocity derived from long-term direct measurements of the CO2 flux.
Geophysical Research Letters, 37, .
(doi:10.1029/2010GL045597).
Abstract
Air-sea open ocean CO2 flux measurements have been made using the Eddy Covariance (EC) technique onboard the weathership Polarfront in the North Atlantic between September 2006 and December 2009. Flux measurements were made using an autonomous system ‘AutoFlux’. CO2 mass density was measured with an open-path infrared gas analyzer. Following quality control procedures, 3938 20-minute flux measurements were made at mean wind speeds up to 19.6 m/s, significantly higher wind speeds than previously published results. The uncertainty in the determination of gas transfer velocities is large, but the mean relationship to wind speed allows a new parameterisation of the gas transfer velocity to be determined. A cubic dependence of gas transfer on wind speed is found, suggesting a significant influence of bubble-mediated exchange on gas transfer.
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More information
Published date: 4 December 2010
Keywords:
Polarfront, gas transfer velocity, air-sea CO2 flux, open-path Licor, AUTOFLUX
Organisations:
Ocean Technology and Engineering, National Oceanography Centre,Southampton, Marine Physics and Ocean Climate
Identifiers
Local EPrints ID: 165753
URI: http://eprints.soton.ac.uk/id/eprint/165753
ISSN: 0094-8276
PURE UUID: e6fa1029-ad38-46a8-9a80-c47cf5fb0123
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Date deposited: 18 Oct 2010 13:39
Last modified: 14 Mar 2024 02:11
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Contributors
Author:
J. Prytherch
Author:
M.J. Yelland
Author:
B.I. Moat
Author:
I. Skjelvan
Author:
M.A. Srokosz
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