Gas transfer under breaking waves: experiments and an improved vorticity-based model

Tsoukala, Vasiliki K.; Moutzouris, C. I.

doi:10.5194/angeo-26-2131-2008

Cited by 4 publications

(2 citation statements)

References 46 publications

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“…8b). This result is consistent with numerous investigations into the effects of waves and bubble-action on rates of airÁsea trace gas exchange Fangohr and Woolf, 2007;Rhee et al, 2007;Woolf et al, 2007;Tsoukala and Moutzouris, 2008).…”

Section: Dependence On Wind Speed Significant Wave Height and Latitudesupporting

confidence: 93%

Constraining annual and seasonal radon-222 flux density from the Southern Ocean using radon-222 concentrations in the boundary layer at Cape Grim

Zahorowski

Griffiths

Chambers

et al. 2013

Tellus B: Chemical and Physical Meteorology

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Radon concentrations measured between 2001 and 2008 in marine air at Cape Grim, a baseline site in north-western Tasmania, are used to constrain the radon flux density from the Southern Ocean. A method is described for selecting hourly radon concentrations that are least perturbed by land emissions and dilution by the free troposphere. The distribution of subsequent radon flux density estimates is representative of a large area of the Southern Ocean, an important fetch region for Southern Hemisphere climate and air pollution studies. The annual mean flux density (0.27 mBq m−2 s−1) compares well with the mean of the limited number of spot measurements previously conducted in the Southern Ocean (0.24 mBq m−2 s−1), and to some spot measurements made in other oceanic regions. However, a number of spot measurements in other oceanic regions, as well as most oceanic radon flux density values assumed for modelling studies and intercomparisons, are considerably lower than the mean reported here. The reported radon flux varies with seasons and, in summer, with latitude. It also shows a quadratic dependence on wind speed and significant wave height, as postulated and measured by others, which seems to support our assumption that the selected least perturbed radon concentrations were in equilibrium with the oceanic radon source. By comparing the least perturbed radon observations in 2002–2003 with corresponding ‘TransCom’ model intercomparison results, the best agreement is found when assuming a normally distributed radon flux density with σ=0.075 mBq m−2 s−1

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Section: Dependence On Wind Speed Significant Wave Height and Latitudesupporting

confidence: 93%

Constraining annual and seasonal radon-222 flux density from the Southern Ocean using radon-222 concentrations in the boundary layer at Cape Grim

Zahorowski

Griffiths

Chambers

et al. 2013

Tellus B: Chemical and Physical Meteorology

View full text Add to dashboard Cite

show abstract

“…Under particular conditions the similar mixtures of bubbles can be formed in lakes, large dams and oceans. In these cases breaking waves (wave breaking initiated at certain wind speeds) influence turbulent diffusion of air (oxygen and CO 2 ) and form water microlayers in the interface [36][37][38][39]. The following sections deal only with processes influenced by the turbulence of water falling from the weirs or forcing through hydropower plants.…”

Section: Fig 2 Air-water Kinetic Exchangementioning

confidence: 99%

Air Bubbles and Water Droplets Entrainment and Removal in Turbulent Water Flows

Vaideliene

Vaidelys

2012

mech

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Singularities in water waves and the Rayleigh–Taylor problem

Fontelos

Hoz

2010

J. Fluid Mech.

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We describe, by means of asymptotic methods and direct numerical simulation, the structure of singularities developing at the interface between two perfect, inviscid and irrotational fluids of different densities ρ1 and ρ2 and under the action of gravity. When the lighter fluid is on top of the heavier fluid, one encounters the water-wave problem for fluids of different densities. In the limit when the density of the lighter fluid is zero, one encounters the classical water-wave problem. Analogously, when the heavier fluid is on top of the lighter fluid, one encounters the Rayleigh–Taylor problem for fluids of different densities, with this being the case when one of the densities is zero for the classical Rayleigh–Taylor problem. We will show that both water-wave and Rayleigh–Taylor problems develop singularities of the Moore-type (singularities in the curvature) when both fluid densities are non-zero. For the classical water-wave problem, we propose and provide evidence of the development of a singularity in the form of a logarithmic spiral, and for the classical Rayleigh–Taylor problem no singularities were found. The regularizing effects of surface tension are also discussed, and estimates of the size and wavelength of the capillary waves, bubbles or blobs that are produced are provided.

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Gas transfer under breaking waves: experiments and an improved vorticity-based model

Cited by 4 publications

References 46 publications

Constraining annual and seasonal radon-222 flux density from the Southern Ocean using radon-222 concentrations in the boundary layer at Cape Grim

Constraining annual and seasonal radon-222 flux density from the Southern Ocean using radon-222 concentrations in the boundary layer at Cape Grim

Air Bubbles and Water Droplets Entrainment and Removal in Turbulent Water Flows

Singularities in water waves and the Rayleigh–Taylor problem

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