Measuring air-sea gas exchange velocities in a large scale annular wind-wave tank
In this study we present gas exchange measurements conducted in a large - scale wind-wave tank. Fourteen chemical species spanning a wide range of - solubility (dimensionless solubility, α = 0.4 to 5470) and - diffusivity (Schmidt number in water, Scw = 594 to 1194) were - examined under various tu...
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| Main Authors: | , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
23 June 2014
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| In: |
Ocean science discussions
Year: 2014, Volume: 11, Pages: 1643-1689 |
| ISSN: | 1812-0822 |
| DOI: | 10.5194/osd-11-1643-2014 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://os.copernicus.org/preprints/11/1643/2014/osd-11-1643-2014.pdf Verlag, lizenzpflichtig, Volltext: https://doi.org/10.5194/osd-11-1643-2014 Verlag, lizenzpflichtig, Volltext: http://adsabs.harvard.edu/abs/2014OcScD..11.1643M 
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| Author Notes: | E. Mesarchaki, C. Kräuter, K.E. Krall, M. Bopp, F. Helleis, J. Williams, and B. Jähne |
MARC
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| 245 | 1 | 0 | |a Measuring air-sea gas exchange velocities in a large scale annular wind-wave tank |c E. Mesarchaki, C. Kräuter, K.E. Krall, M. Bopp, F. Helleis, J. Williams, and B. Jähne |
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| 520 | |a In this study we present gas exchange measurements conducted in a large - scale wind-wave tank. Fourteen chemical species spanning a wide range of - solubility (dimensionless solubility, α = 0.4 to 5470) and - diffusivity (Schmidt number in water, Scw = 594 to 1194) were - examined under various turbulent (u10 = 0.8 to 15 m - s-1 conditions. Additional experiments were performed under - different surfactant modulated (two different concentration levels of - Triton X-100) surface states. This paper details the complete - methodology, experimental procedure and instrumentation used to derive - the total transfer velocity for all examined tracers. The results - presented here demonstrate the efficacy of the proposed method, and the - derived gas exchange velocities are shown to be comparable to previous - investigations. The gas transfer behaviour is exemplified by contrasting - two species at the two solubility extremes, namely nitrous oxide - (N2O) and methanol (CH3OH). Interestingly, a - strong transfer velocity reduction (up to a factor of three) was - observed for N2O under a surfactant covered water surface. In - contrast, the surfactant affected CH3OH, the high solubility - tracer only weakly. | ||
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