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Direct measurements of the CO2 flux over the ocean: development of a novel method

Direct measurements of the CO2 flux over the ocean: development of a novel method
Direct measurements of the CO2 flux over the ocean: development of a novel method
Over the ocean, eddy correlation measurements of the air-sea CO2 flux obtained with open-path sensors have typically been an order of magnitude larger than those estimated by other techniques or sensors. It is shown here that this discrepancy is due to cross sensitivity to water vapor fluctuations: a novel correction procedure is demonstrated, tested against an independent data set and proved to be robust. After correction, the observed gas transfer velocities are in reasonable agreement with published values obtained using closed-path sensors or by tracer techniques. Data from open-path sensors may now be used for air-sea CO2 flux estimation, greatly increasing the information available on air-sea gas transfer velocity.
gas transfer velocity, air-sea CO2 flux, open-path Licor.
0094-8276
L03607
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
Neill, C.
811c8b58-f1db-4571-8e50-fcdfb98eeb58
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
Neill, C.
811c8b58-f1db-4571-8e50-fcdfb98eeb58

Prytherch, J., Yelland, M.J., Moat, B.I., Skjelvan, I. and Neill, C. (2010) Direct measurements of the CO2 flux over the ocean: development of a novel method. Geophysical Research Letters, 37, L03607. (doi:10.1029/2009GL041482).

Record type: Article

Abstract

Over the ocean, eddy correlation measurements of the air-sea CO2 flux obtained with open-path sensors have typically been an order of magnitude larger than those estimated by other techniques or sensors. It is shown here that this discrepancy is due to cross sensitivity to water vapor fluctuations: a novel correction procedure is demonstrated, tested against an independent data set and proved to be robust. After correction, the observed gas transfer velocities are in reasonable agreement with published values obtained using closed-path sensors or by tracer techniques. Data from open-path sensors may now be used for air-sea CO2 flux estimation, greatly increasing the information available on air-sea gas transfer velocity.

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More information

Published date: 2010
Keywords: gas transfer velocity, air-sea CO2 flux, open-path Licor.
Organisations: Ocean and Earth Science, Ocean Technology and Engineering, National Oceanography Centre,Southampton, Marine Physics and Ocean Climate

Identifiers

Local EPrints ID: 71821
URI: http://eprints.soton.ac.uk/id/eprint/71821
ISSN: 0094-8276
PURE UUID: 2be2724d-b468-4390-91ad-de79bec18298

Catalogue record

Date deposited: 04 Jan 2010
Last modified: 13 Mar 2024 20:46

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Contributors

Author: J. Prytherch
Author: M.J. Yelland
Author: B.I. Moat
Author: I. Skjelvan
Author: C. Neill

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