Wind profiles and change of terrain roughness at Riso

PANOFSKY, HA; PETERSEN, EL

doi:10.1256/smsqj.41810

Cited by 3 publications

(2 citation statements)

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“…In a recent paper Panofsky and Petersen (1972) present data obtained from the 125 m meteorological tower at AEK Risa. Here we consider those cases with essentially neutral stability in more detail and make some comparisons between data and theoretical results obtained from numerical models of two-dimensional flow above inhomogeneous terrain.…”

Section: Introductionmentioning

confidence: 99%

Some comparisons between observed wind profiles at Risø and theoretical predictions for flow over inhomogeneous terrain

Petersen¹,

Taylor

1973

Quart J Royal Meteoro Soc

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Velocity profiles observed in near neutral conditions at the Risø 125 m tower are presented. The upwind terrain contains, depending on wind direction, either one or two distinct changes in surface roughness. Comparisons are made between the observed profiles and those predicted using models based on mixing‐length theory, and, in the case of a single roughness change, the turbulent energy equation. Comparisons with the mixing‐length model are moderately good but some features of the observed profiles are missing from the theoretical predictions. The particular turbulent energy equation model used appears to give slightly less accurate predictions than the mixing‐length model.

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Section: Introductionmentioning

confidence: 99%

Some comparisons between observed wind profiles at Risø and theoretical predictions for flow over inhomogeneous terrain

Petersen¹,

Taylor

1973

Quart J Royal Meteoro Soc

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“…The relation of 0 to various terrain types is extensively studied by Nappo [9], Smedman-Hogstrom and Hogstrom [10], Hicks et al [11], Kondo and Yamazawa [12], Thompson [13], and Garratt [14] and occurrence of imaginary and small 0 values was reported by Panofsky and Peterson [15] over a narrow peninsula surrounded by bays of varying width. The 0 values may vary with the heights of wind measurements as profiles from tower will sense only local terrain irregularities of small horizontal size and also at the low level the roughness length is representative of the locally smooth surface crops [16,17].…”

Section: Introductionmentioning

confidence: 96%

Coastal Boundary Layer Characteristics of Wind, Turbulence, and Surface Roughness Parameter over the Thumba Equatorial Rocket Launching Station, India

Namboodiri

Krishnan

Nileshwar

et al. 2014

Journal of Climatology

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The study discusses the features of wind, turbulence, and surface roughness parameter over the coastal boundary layer of the Peninsular Indian Station, Thumba Equatorial Rocket Launching Station (TERLS). Every 5 min measurements from an ultrasonic anemometer at 3.3 m agl from May 2007 to December 2012 are used for this work. Symmetries in mesoscale turbulence, stress off-wind angle computations, structure of scalar wind, resultant wind direction, momentum flux ( ), Obukhov length ( ), frictional velocity ( * ), w-component, turbulent heat flux ( ), drag coefficient ( ), turbulent intensities, standard deviation of wind directions ( ), wind steadiness factor-relationship, bivariate normal distribution (BND) wind model, surface roughness parameter ( 0 ), 0 and wind direction ( ) relationship, and variation of 0 with the Indian South West monsoon activity are discussed.

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