Table of Contents
International Journal of Atmospheric Sciences
Volume 2014 (2014), Article ID 704079, 22 pages
http://dx.doi.org/10.1155/2014/704079
Research Article

A Regional Climate Simulation Study Using WRF-ARW Model over Europe and Evaluation for Extreme Temperature Weather Events

1Centro de Geofísica, Universidade de Évora, 7000 Evora, Portugal
2Departamento de Física, Centro de Geofísica, Escola de Ciências e Tecnologia, Universidade de Évora, 7000 Evora, Portugal
3Radiological Safety and Environment Group, Indira Gandhi Center for Atomic Research, Kalpakkam 603102, India

Received 7 April 2014; Revised 3 July 2014; Accepted 4 July 2014; Published 2 September 2014

Academic Editor: Helena A. Flocas

Copyright © 2014 Hari Prasad Dasari et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In this study regional climate simulations of Europe over the 60-year period (1950–2010) made using a 25 km resolution WRF model with NCEP 2.5 degree analysis for initial/boundary conditions are presented for air temperature and extreme events of heat and cold waves. The E-OBS 25 km analysis data sets are used for model validation. Results suggest that WRF could simulate the temperature trends (mean, maximum, minimum, seasonal maximum, and minimum) over most parts of Europe except over Iberian Peninsula, Mediterranean, and coastal regions. Model could simulate the slight fall of temperatures from 1950 to 1970 as well as steady rise in temperatures from 1970 to 2010 over Europe. Simulations show occurrence of about 80% of the total heat waves in the period 1970–2010 with maximum number of heat/cold wave episodes over Eastern and Central Europe in good agreement with observations. Relatively poor correlations and high bias are found for heat/cold wave episodes over the complex topographic areas of Iberia and Mediterranean regions where land surface processes play important role in local climate. The poor simulation of temperatures over the above regions could be due to deficiencies in representation of topography and surface physics which need further sensitivity studies.