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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:10 |
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Conference: Bucharest University Faculty of Physics 2018 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Evaluation of wind speed forecast from ALARO model in comparison with SODAR data
Authors:
Alexandra CRACIUN(1,2), Simona TASCU(2)
*
Affiliation:
1) University of Bucharest, Faculty of Physics, P.O.BOX MG - 11, Magurele, Bucharest, Romania
2)National Meteorological Administration, Sos. Bucuresti-Ploiesti, nr. 97, Bucharest, Romania
E-mail
alexandra.craciun@meteoromania.ro
Keywords:
numerical weather prediction, wind speed, SODAR
Abstract:
Numerical forecast of wind speed is usually performed for operational meteorology purposes at the standard meteorological height (10 m above ground). Nonetheless, specific applications such as wind power models or aviation, require numeric wind forecast data at different altitudes, up to 220 m. Modern numerical models are able to provide such forecast, but in order to obtain a suitable validation, observation data for this levels is needed. In order to evaluate the wind forecast of the limited area model ALARO (Aire Limitée Adaptation/Application de la Recherche à l'Opérationnel), observation data from a Doppler SODAR (SOnic Detection And Ranging) were used. This wind profiler is placed on Otopeni airport, providing useful information regarding wind at levels of interest for aviation. The evaluation of the wind speed forecast was made for a two-month period (April – May 2018), using data for several heights: 40, 70, 100, 130, 160, 190, 220 m. Averaged wind speed profiles and hourly values of wind speed were analyzed, as well as a case study showing increased wind shear. The results show the importance of assessing the differences in wind speed by using different height levels simulated by the ALARO model. Furthermore, in comparison with observational data, the numerical forecast shows a more smoothed solution which may be corrected by applying statistical methods.
Acknowledgement:
Many thanks to Valentin Magureanu from Romanian Air Traffic Services Administration, who provided the SODAR data used for these experiments.
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