Wind Profiling Articles

  • Using Lidar for WRA Campaigns: Your Questions Answered (Part I)

    In the course of conversations with wind developers new to Lidar technology, a number of questions seem to come up regularly. In this and future blog posts, I will attempt to answer these questions in some detail to benefit others who might be pondering them as well. Two very practical questions have to do with how WINDCUBE® ...


    By NRG Systems

  • Water Plant’s Investment in GTI Covers Brings Both Operational and Safety Benefits

    The Utility: The Griswold Water Treatment Plant is part of Aurora Water, the utility that manages water and wastewater in the city of Aurora, Colorado, USA. This direct filtration plant treats 80 million gallons of water per day (302,800 m³/d). The Utility’s Needs: Originally built in 1965, the Griswold Water Treatment Plant had undergone ...

  • Roughness length parameterisation in urban boundary layers

    In an attempt to develop an improved model for the wind-speed profile valid for urban boundary layers, the role played by the roughness length z 0 , i.e., the constant of integration of the vertical gradient of the wind speed, is extended. z 0 is assumed here as a ‘dynamic’ variable rather than as a ‘geometric’ parameter independent of the flow properties. On the basis of experiments ...


    By Inderscience Publishers

  • Evaluation of the influence of micrometeorological data on concentration estimates

    A dispersion model for continuous releases of pollutants in the atmospheric boundary layer is applied to study the influence on modelled concentrations of different estimates of the key micrometeorological variables that represent the dispersion processes. The modelling approach is based on the advection-diffusion equation and includes profiles of wind and eddy diffusivity for the entire ...


    By Inderscience Publishers

  • Experimental study on flow and ventilation behaviours over idealised urban roughness

    Flows in the urban boundary layer (UBL) are strongly affected by the inhomogeneous roughness elements at the bottom surface. In particular, in the near-ground region (roughness sublayer), the effect of the surface roughness dominates that complicates the behaviours of mean flow and turbulence and subsequently the near-wall transport processes. To safeguard the health of urban inhabitants, it is ...


    By Inderscience Publishers

  • The Pacific Coast Climate Agreement: West Coast Progress

    At the end of October, Christy Clark, BC’s Premier, signed a high profile agreement with the Governors of Washington, Oregon and California in which the four leaders make a strong and clear commitment to lead national and international policy on climate change. (1) What’s in the Small Print? So what was in the agreement? They affirm their “shared vision of ...


    By GLOBE SERIES

  • A brief statement of airport applications for doppler SODAR systems

    Doppler SODAR Operating similar to a sonar the Doppler SODAR (Sonic Detection and Ranging) directly measures the atmospheric wind speed and direction at multiple altitudes simultaneously. These systems utilize the Doppler effect imposed on the received acoustic signal echoed by the atmosphere for the wind measurements. The Doppler effect is the common observation that the acoustic signal ...

  • miniSODAR

    The miniSODAR is a high-frequency Doppler sodar system that was designed to measure the atmospheric wind profile from 15 meters to 150/200 meters (data is often available to 250 meters) in 5-meter increments. It operates by generating a short tone burst (30 ms to 100 ms) in the frequency range of 4 kHz to 6 kHz. It monitors the low-level acoustic signal echoed by the atmosphere. The echo is ...

  • On the application of miniSoDAR technology to wind energy

    Introduction In the late 1990’s wind turbines with nacelle heights exceeding 60 meters were introduced to the wind energy community. Initially, wind prospecting and siting studies continued to use 50-meter wind towers and extrapolate the measurement to the nacelle heights. It was quickly determined that this approach was not sufficient for the placement of these tall turbines. The next ...

  • Verification of wind energy related measurements with a SODAR system

    Abstract Complex terrain and growing wind energy converters (WEC) in wind parks generate increasing interest in determining wind profiles and turbulence besides the general forecast of annual energy production. Increasing hub heights and growing rotor diameters of advanced WEC make SODAR systems a valuable alternative to meteorological towers. SODAR systems provide wind profiles as well as ...

  • ADMS 5 Buildings Validation Snyder Wind Tunnel Experiments

    1 Introduction Experiments were conducted in a simulated boundary layer representative of rural terrain with a few shrubs and trees in neutral conditions. Vertical profiles of concentration were measured downstream of a rectangular building for various stack heights, emission characteristics and building positions. The model scale in the wind tunnel was 1/200 of full scale. Full ...

  • ADMS 5 Buildings & Complex Terrain Validation Martins Creek Steam Electric Station

    1 Introduction The Martins Creek Steam Electric Station1 [1] is located in a rural area along the Delaware River on the Pennsylvania/New Jersey border, approximately 30 km north-east of Allentown, PA and 95 km north of Philadelphia, PA. The area can be characterised by complex terrain rising above the stacks. Sources included multiple tall stacks ranging from 122 to 183 ...

  • ADMS 5 Buildings Validation Alaska North Slope Tracer Study

    1 Introduction The Alaska North Slope tracer study1 (see Figure 1) involved 44 hours of buoyant SF$ releases from a 39-in high turbine stack. Tracer sampler coverage ranged over seven arcs from 50 to 3000 m downwind. Meteorological data, including wind speed, wind direction, temperature, sigma-theta and sigma-w, were available from an on-site tower at ...

  • Momentum Flux: Gross, Scalar, Alongwind, or Net?

    Modern micrometeorology is an amalgam of two traditions: one arises from field measurements in the open atmosphere and another from wind tunnel experiments. Early micrometeorological field work, and even relatively recent studies (viz. the von Karman constant experiments by Frenzen and Vogel, 1995), were done with precision cup anemometers, which can only provide a scalar speed measurement. Most ...

  • Verification of SBL models by mobile SODAR measurements

    Models of atmospheric pollutant transport need information about the structure of the atmospheric boundary layer (ABL). The most important characteristics for such applications are the parameterisation of the stable boundary layer (SBL) and the mixing layer height (MLH). Recently, many different schemes have been employed to calculate the SBL height, but there are many problems with applying ...


    By Inderscience Publishers

  • Zasavje canyon regional online air pollution modelling system in highly complex terrain - description and validation

    Zasavje is an industrial region in Slovenia located along the Sava River's steep canyon where PM10 air pollution is a major problem. In the paper a national project with the title 'Prognostic and diagnostic integrated regional air pollution modelling system' is described where it is shown that such a project can significantly contribute to the proper understanding of air pollution in smaller ...


    By Inderscience Publishers

  • Short–term fine resolution WRF forecast data validation in complex terrain in Slovenia

    For the air pollution modelling studies over highly complex terrain, vertical wind profiles are essential. In the article we present evaluation about using the WRF model as the source of wind profile information. We tested WRF's one day short–term forecasts at 4 km and half hour resolution running every day to obtain 3D meteorological fields and compared these data with the different ...


    By Inderscience Publishers

  • On the wind flow patterns under neutral and unstable conditions in an urban area

    Wind flow and pollutant dispersion within urban areas depend on the approaching flow profile and temperature stratification. Thus, the flow field developed under neutral and unstable stratification conditions, within a street–canyon, was studied experimentally and numerically for a two–dimensional urban background set–up. Wind–tunnel measurements were carried out with a triple hot sensor ...


    By Inderscience Publishers

  • Experimental study of turbulence and vertical temperature profile in the urban boundary layer

    We observed the turbulence and vertical profile of temperature in and above the roughness sublayer (RS) using a tower, a tethered balloon and a Doppler sodar in Himeji City. A 3–D ultrasonic anemometer–thermometer was sited at a height of 54 m on the tower. The present results showed that in the RS, the ratio of friction velocity to wind speed, u* /u, observed under unstable ...


    By Inderscience Publishers

  • Simulation of flow in an idealised city using various CFD codes

    In the framework of the COST 732 action, several teams run models to verify the proposed Best Practice Guideline (Franke et al., 2007). The data set concerns the Mock Urban Setting Test (MUST) experiment, where wind field and dispersion measurements were conducted for an array of obstacles as a full-scale experiment, as well as in a wind tunnel. The pollutant transport research group at the ...


    By Inderscience Publishers

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