A model of gas transfer across air-water interfaces with capillary waves
| Autor: | Michel Coantic |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
Physics
Atmospheric Science Capillary wave Turbulent diffusion Ecology Turbulence Schmidt number Paleontology Soil Science Wind stress Forestry Mechanics Aquatic Science Oceanography Atmospheric sciences Thermal diffusivity Wind speed Physics::Fluid Dynamics Atmosphere Geophysics Space and Planetary Science Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Water Science and Technology |
| Zdroj: | Journal of Geophysical Research. 91:3925 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/jc091ic03p03925 |
| Popis: | The transfer of weakly soluble gases between the atmosphere and seas or lakes is controlled by liquid-phase molecular and turbulent diffusion mechanisms, which essentially depend on wind velocity and gas Schmidt number. A distinct change in regime is observed around 2–3 m s−1, when capillary waves appear, which present models cannot explain. We suggest relating turbulent diffusivity with (1) possible motions close to a “free” liquid-gas interface, (2) mean current distribution in that region, and (3) capillary wave spectra. Resulting transfer velocities explain laboratory and field data at low and moderate wind speeds. |
| Databáze: | OpenAIRE |
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