| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:26 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Lateral and boundary conditions for numerical weather prediction models.COSMO – wrf coupling
Authors:
Amalia Iriza(1,2), Rodica-Claudia Dumitrache(1), Aurelia Lupascu(1),Cosmin Danut Barbu(1), Bogdan Maco (1)
Affiliation:
1. National Meteorological Administration, Bucharest, Romania
2. Univerity of Bucharest, Faculty of Physics, P.O.BOX MG-11, Magurele, Romania
E-mail
amalia.iriza@meteoromania.ro
Keywords:
numerical modelling, lateral and boundary conditions
Abstract:
Limited area numerical weather prediction models are used for various forecasting and research applications. One of the most important limitations of regional models are lateral and boundary conditions used for their integration. These conditions come from global models which usually have a coarser grid and fewer vertical levels. The WRF (Weather Research and Forecasting) model generally uses lateral and boundary conditions taken from the GFS (Global Forecast System) or the ECMWF (European Center for Medium-Range Weather Forecasts) global models. The aim of this study is to present the forecast of the WRF model coupled with the limited area COSMO (Consortium for Small-scale Modelling) model. In the first part of the paper we present some technical aspects and necessary preprocessing steps. These are required in order to use the output of the COSMO model as lateral and boundary conditions for the integration of the WRF model. Two types of experiments were performed in order to evaluate the COSMO-WRF coupling and to asses the quality of the numerical forecasts from the WRF model. The WRF model was run for two nested domains, using lateral and boundary conditions from the ECMWF model (at 50 km horizontal resolution) and from the COSMO model (at 7 km horizontal resolution). The experiments were performed for two different weather events: 17 July 2011 (convective mesoscale case) and 3 February 2012 (frontal case). The analysis of the results from the two sets of experiments showed a better performance of the WRF model using lateral and boundary conditions from the COSMO model.
|
|
|
|