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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:35 |
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Conference: Bucharest University Faculty of Physics 2014 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Tests on Physical Parameterizations Sensitivity of the WRF Model
Authors:
Amalia IRIZA(1,2), Rodica Claudia DUMITRACHE(1), Sabina STEFAN(2)
Affiliation:
1. National Meteorological Administration
2. University of Bucharest, Faculty of Physics, P.O.BOX MG-11, Magurele, Ilfov, Romania
E-mail
amalia.iriza@gmail.com
Keywords:
numerical modelling, physical parameterizations
Abstract:
The present study was conducted in order to assess the effects of physics parameterizations on the forecast of severe weather events using the high-resolution WRF (Weather Research and Forecasting) model. The sensitivity of rainfall and 10m wind speed to various physics parameterizations (planetary boundary layer, cumulus and so on) was evaluated. In order to evaluate the sensitivity of the WRF model to various physics parameterizations, 20 experiments were performed for two cases of severe weather on Romanian territory (17 July 2011 and 3 February 2012). The configuration of the high-resolution WRF model, the necessary pre-processing steps and the design of the numerical simulations are presented. The model was run on two nested domains (3km and 1km), using initial and lateral boundary conditions from the COSMO (Consortium for Small-scale Modelling) and ECMWF (European Centre for Medium-Range Weather Forecasts) models respectively. The model performance and dependency on the choice of planetary boundary layer and cumulus parameterizations are examined in terms of precipitation distributions and spatial and temporal 10m wind speed. The results from all the experiments showed an improvement in the accuracy of WRF model in forecasting severe weather events by using various parameterization schemes.
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