DBPapers
DOI: 10.5593/SGEM2014/B42/S19.066

SENSITIVITY EXPERIMENTS WITH REGIONAL CLIMATE MODEL REGCM TO BE USED FOR BULGARIA

T. Todorov, T. Denev, K. Malcheva
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-16-2 / ISSN 1314-2704, June 19-25, 2014, Book 4 ,Vol. 2, 501-508 pp

ABSTRACT
The regional climate model RegCM, is a community model, constantly improving
towards accuracy and flexibility for use. Being at the beginning of its application at the
National Institute of Meteorology and Hydrology (NIMH) – Bulgarian Academy of
Sciences, the model has to be adjusted for better representation of the results obtained when making a comparison with observations for the territory of Bulgaria This requires tuning by varying many input parameters, including the possibility for choice of different parameterization schemes. In this work are presented some results from the sensitivity analyses, carried out with the model version 4.4rc8, and comparison of these results with observations at 11 meteorological stations on the territory of the country for year 1990. The numerical simulations are provided applying sub-grid modeling and horizontal resolution 10 km. Comparison concerns monthly and seasonal mean temperatures and total precipitations. The comparison shows the best results for precipitations when using the Tiedtke’s scheme and for the temperatures - the Emanuel’s scheme. There is still additional need to adjust the input parameters for better results concerning the territory of Bulgaria, including the use of different datasets.

Keywords: regional climate model, sub-grid modeling, climate, temperature,
precipitation