Simulation of stably stratified flow in complex terrain: flow structures and dividing streamline

Silver, Z.; Dimitrova, Reneta; Zsedrovits, Tamás; Baines, Peter G.; Fernando, Harindra J. S.

doi:10.1007/s10652-018-9648-y

Cited by 4 publications

(3 citation statements)

References 38 publications

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“…When G ≈ 1, resonant lee waves appear with a shorter wavelength. For G > 1 the wavelengths become still shorter, rotors appear near the surface, and wave breaking occurs above the lee forming turbulent regions (Baines and Hoinka 1985;Silver et al 2019). For 0.5 < G < 2 upstream propagating columnar wave modes appear.…”

Section: May 2019mentioning

confidence: 99%

The Perdigão: Peering into Microscale Details of Mountain Winds

Fernando

Mann

Palma

et al. 2019

Bulletin of the American Meteorological Society

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124

129

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A grand challenge from the wind energy industry is to provide reliable forecasts on mountain winds several hours in advance at microscale (∼100 m) resolution. This requires better microscale wind-energy physics included in forecasting tools, for which field observations are imperative. While mesoscale (∼1 km) measurements abound, microscale processes are not monitored in practice nor do plentiful measurements exist at this scale. After a decade of preparation, a group of European and U.S. collaborators conducted a field campaign during 1 May–15 June 2017 in Vale Cobrão in central Portugal to delve into microscale processes in complex terrain. This valley is nestled within a parallel double ridge near the town of Perdigão with dominant wind climatology normal to the ridges, offering a nominally simple yet natural setting for fundamental studies. The dense instrument ensemble deployed covered a ∼4 km × 4 km swath horizontally and ∼10 km vertically, with measurement resolutions of tens of meters and seconds. Meteorological data were collected continuously, capturing multiscale flow interactions from synoptic to microscales, diurnal variability, thermal circulation, turbine wake and acoustics, waves, and turbulence. Particularly noteworthy are the extensiveness of the instrument array, space–time scales covered, use of leading-edge multiple-lidar technology alongside conventional tower and remote sensors, fruitful cross-Atlantic partnership, and adaptive management of the campaign. Preliminary data analysis uncovered interesting new phenomena. All data are being archived for public use.

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Section: May 2019mentioning

confidence: 99%

The Perdigão: Peering into Microscale Details of Mountain Winds

Fernando

Mann

Palma

et al. 2019

Bulletin of the American Meteorological Society

Self Cite

124

129

View full text Add to dashboard Cite

show abstract

“…The SI contains eight manuscripts with an emphasis on results from the MATERHORN program. The SI includes novel field-experiment [1,4,6,7] and laboratory-experiment results [10], as well as high-resolution [9] and mesoscale atmospheric simulation studies [2,8].…”

mentioning

confidence: 99%

“…This SI also includes two numerical modeling studies of the MATERHORN field campaign [2,8] and one focused on using a novel computational technique to study flows in mountainous terrain [9]. Silver et al [8] use the Weather Research and Forecasting (WRF) model to simulate flow during the MATERHORN campaign at high resolutions to study flow separation and the concept of dividing streamlines in realistic mountainous terrain during stably stratified conditions with strong synoptic forcing. They show that classical methods for identifying dividing streamlines are insufficient for realistic terrain and present a novel software for evaluating dividing streamlines in complex terrain.…”

mentioning

confidence: 99%