Comparison of WRF wind profiles with Doppler lidar measurements at Mace Head
Dotted lines are 1:1 line (wind speed and direction), and 1:360-1 line (wind direction).
The Doppler lidar at Mace Head is a WindCube 200S (manufacturer Leosphere). It emits at 1.54 µm and measures the intensity of backscattered light as well as the Doppler shift of the detected radiation. From the deviation of the detected wavelength from the emitted one, profiles of the radial wind can be determined. Subsequently, the radial wind is converted into profiles of the three wind components. The horizontal wind speed and the wind direction are derived using a least squares fit of the radial wind during full conical scans (VAD). The goodness of the fit is influenced by clouds and wind velocity.
The Centre for Climate & Air Pollution Studies (C-CAPS) at NUI Galway is running the Weather Research Forecasting model (WRF) for operational daily forecasts. WRF is run at three different horizontal resolutions on nested grids of 1, 5, and 25 km grid size. We show here the validation of WRF profiles of horizontal wind speed and direction, comparing them with Doppler wind lidar profiles from Mace Head.
The pictures shown here are updated daily. Data are not quality assured.
The Remote Sensing Division of the Mace Head Atmospheric Research Station is run by the Centre for Climate & Air Pollution Studies (C-CAPS) at NUI Galway and supported by Irish Environmental Protection Agency (EPA), Irish Aviation Authority (IAA), and Science Foundation Ireland (SFI). Remote Sensing at Mace Head also benefits from involvement in Cloudnet; European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases ACTRIS and ACTRIS-2 (grant agreement numbers 262254 and 654109); European FP7 collaborative project BACCHUS (Impact of Biogenic versus Anthropogenic emissions on Clouds and Climate: towards a Holistic UnderStanding, grant agreement number 603445); and COST action ES1303: TOPROF (Towards operational ground based profiling with ceilometers, doppler lidars and microwave radiometers for improving weather forecasts) supported by COST (European Cooperation in Science and Technology).