Momentum and buoyancy transfer in atmospheric turbulent boundary layer over wavy water surface – Part 2: Wind–wave spectra

Troitskaya, Yuliya; Ezhova, Ekaterina; Sergeev, D. A.; Kandaurov, Alexander; Baidakov, G. A.; Vdovin, Maxim; Zilitinkevich, Sergej

doi:10.5194/npg-20-841-2013

Cited by 8 publications

(7 citation statements)

References 32 publications

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“…Troitskaya et al (2013) have confirmed good performance of these approximations of K m and K ρ . Coupled sets of equations for wave-induced disturbances, Eqs.…”

Section: Interaction Of Stratified Mabl With Harmonic Wavesupporting

confidence: 63%

“…Of special interest is the case of swell, when the MABL stratification strongly affects wave-induced fluxes. In Part 2 (Troitskaya et al, 2013), we investigate how the calculated exchange coefficients depend on the wind-wave spectrum, and compare results with data collected in the COARE 3.0 algorithm (Fairall et al, 2003).…”

Section: Published By Copernicus Publications On Behalf Of the Europementioning

confidence: 99%

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Momentum and buoyancy transfer in atmospheric turbulent boundary layer over wavy water surface – Part 1: Harmonic wave

Troitskaya

Ezhova

Зилитинкевич

2013

Nonlin. Processes Geophys.

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Abstract. The surface-drag and mass-transfer coefficients are determined within a self-consistent problem of waveinduced perturbations and mean fields of velocity and density in the air, using a quasi-linear model based on the Reynolds equations with down-gradient turbulence closure. Investigation of a harmonic wave propagating along the wind has disclosed that the surface drag is generally larger for shorter waves. This effect is more pronounced in the unstable and neutral stratification. The stable stratification suppresses turbulence, which leads to weakening of the momentum and mass transfer.

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“…Troitskaya et al (2013) have confirmed good performance of these approximations of K m and K ρ . Coupled sets of equations for wave-induced disturbances, Eqs.…”

Section: Interaction Of Stratified Mabl With Harmonic Wavesupporting

confidence: 63%

Section: Published By Copernicus Publications On Behalf Of the Europementioning

confidence: 99%

Momentum and buoyancy transfer in atmospheric turbulent boundary layer over wavy water surface – Part 1: Harmonic wave

Troitskaya

Ezhova

Зилитинкевич

2013

Nonlin. Processes Geophys.

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“…Mu et al, 2007;Su et al, 2007;Fisher et al, 2008;Sheffield et al, 2010). The water storage change component can be obtained from satellite data, and the water level in lakes and large-scale river systems can be estimated from satellite altimetry with special algorithms developed for terrestrial waters (Berry et al, 2005;Velicogna et al, 2012;Troitskaya et al, 2012Troitskaya et al, , 2013.…”

Section: Hydrological Cyclementioning

confidence: 99%

Pan-Eurasian Experiment (PEEX): towards a holistic understanding of the feedbacks and interactions in the land–atmosphere–ocean–society continuum in the northern Eurasian region

et al. 2016

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Abstract. The northern Eurasian regions and Arctic Ocean will very likely undergo substantial changes during the next decades. The Arctic-boreal natural environments play a crucial role in the global climate via albedo change, carbon sources and sinks as well as atmospheric aerosol production from biogenic volatile organic compounds. Furthermore, it is expected that global trade activities, demographic movement, and use of natural resources will be increasing in the Arctic regions. There is a need for a novel research approach, which not only identifies and tackles the relevant multi-disciplinary research questions, but also is able to make a holistic system analysis of the expected feedbacks. In this paper, we introduce the research agenda of the Pan-Eurasian Experiment (PEEX), a multi-scale, multi-disciplinary and international program started in 2012 (https://www.atm.helsinki.fi/peex/). PEEX sets a research approach by which large-scale research topics are investigated from a system perspective and which aims to fill the key gaps in our understanding of the feedbacks and interactions between the land-atmosphereaquatic-society continuum in the northern Eurasian region. We introduce here the state of the art for the key topics in the PEEX research agenda and present the future prospects of the research, which we see relevant in this context.

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“…into the 2D Navier‐Stokes equations and linearization with respect to χ 1 , ψ 1 , and Θ 1 . The resulting equations can be written in the curvilinear coordinates ( ξ , η ) in the form (Troitskaya et al (, )):

\begin{matrix} i k (\frac{d ψ_{0}}{d η} χ_{1} - \frac{d χ_{0}}{d η} ψ_{1}) - \frac{i k g}{Θ_{0}} (Θ_{1} - a \frac{d Θ}{d η} {normale}^{- k η}) \\ = ν (\frac{{normald}^{2} χ_{1}}{d η^{2}} - k^{2} χ_{1}), \end{matrix}

\frac{d^{2} ψ_{1}}{normald η^{2}} - k^{2} ψ_{1} = χ_{1} - 2 a k e^{prefix- k η} χ_{0},

normali k ((), \frac{normald ψ_{0}}{normald η} Θ_{1} - \frac{normald Θ}{normald η} ψ_{1}) = \frac{ν}{P r} ((), \frac{d^{2} Θ_{1}}{normald η^{2}} - k^{2} Θ_{1}) .

…”

Section: The Resonant Mechanism Of Secondary Instabilitymentioning

confidence: 99%

Stably stratified air‐flow over a waved water surface. Part 2: Wave‐induced pre‐turbulent motions

Druzhinin

Troitskaya

Зилитинкевич

2015

Quart J Royal Meteoro Soc

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Recent experimental and direct numerical simulation (DNS) studies have discovered that stably stratified boundary‐layer turbulence over a flat surface is characterized by the critical Reynolds number, ReL, based on the Obukhov turbulent length‐scale and the friction velocity, such that the transition from turbulent to laminar regime occurs at ReL ≈ 102. We have performed DNS of stably stratified flows over both flat and waved surfaces for a wide range of bulk Reynolds numbers and Richardson numbers and revealed that the same threshold, ReL = 102, holds true over waved surfaces. However, when the surface wave slope is sufficiently steep, the supercritically stratified flow involves wave‐induced, ‘pre‐turbulent’ flow patterns, most pronounced in the vicinity of the waved water surface. In the present article, we study basic properties of these motions through DNS and propose a theoretical model of their generation via secondary parametric resonance instability of two‐dimensional disturbances induced in the air‐flow by the surface waves.

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Momentum and buoyancy transfer in atmospheric turbulent boundary layer over wavy water surface – Part 2: Wind–wave spectra

Cited by 8 publications

References 32 publications

Momentum and buoyancy transfer in atmospheric turbulent boundary layer over wavy water surface – Part 1: Harmonic wave

Momentum and buoyancy transfer in atmospheric turbulent boundary layer over wavy water surface – Part 1: Harmonic wave

Pan-Eurasian Experiment (PEEX): towards a holistic understanding of the feedbacks and interactions in the land–atmosphere–ocean–society continuum in the northern Eurasian region

Stably stratified air‐flow over a waved water surface. Part 2: Wave‐induced pre‐turbulent motions

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