Evaluation of Weather Research and Forecasting Model (WRF) Simulations over Middle East
Keywords:numerical weather prediction, WRF, NCL, Middle East
AbstractThe Weather Research and Forecasting model (WRF) is an atmospheric simulation system designed for both research and operational applications. This worldwide used model requires a sophisticated modeling experience and computing skills. In this study, WRF model was used to predict many atmospheric parameters based on the initial conditions extracted from NOMADS data sets. The study area is basically the region surrounded by the longitudes and latitudes: 15o-75o E and 10.5o-45o N which typically includes the Middle East region. The model was installed on Linux platform with a grid size of 10 km in the X and Y directions. A low pressure trough was tracked in its movement from west to east via the Middle East during the period from 1 to 7 January 2010 as a case study of the WRF model. MATLAB and NCAR Command Language (NCL) were used to display the model output. To evaluate the forecasted parameters and patterns, some comparisons were made between the predicted and actual weather charts. Wind speeds and directions in the prognostic and actual charts of 700 hPa were in agreement. However, the predicted values of geopotential heights in WRF are somewhat overestimate the actual ones. This may be attributed to the differences in the data sources and data analysis methods of the two data agencies, NOMADS and ECMWF.
Skamarock, W. C., Klemp J. B., Dudhia J., "Prototypes for the WRF (Weather Research and Forecasting) model," in Ninth Conf. on Mesoscale Processes, Fort Lauderdale, FL, 2001.
Skamarock, W. C., Klemp J. B., Dudhia J., Gill D. O., Baker D. M., Wang W. Powers J. G., " A Description of the Advanced Research WRF Version 2. NCAR/TN-468+STR,," NCAR Technical Note, USA, 2005.
Cheng, W. Y. Y., Steenburgh W. J., "Evaluation of Surface Sensible Weather Forecasts by the WRF and the Eta Models over the Western United States., ,.," Wea. Forecasting, vol. 20, no. 1, pp. 812-821, 2005.
Janjic, Z., Black T., Rogers E., Chuang H., DiMego G., "The NCEP nonhydrostatic mesoscale forecasting model. Extended abstract," in 10th Conference on Mesoscale Processes, Portland, OR, 2003.
Sammany M. S. El-, " Forecasting of flash floods over Wadi Watier-Sinai Peninsula using the weather research and forecasting (WRF) model," Engin. Tech., vol. 46, no. 1, pp. 996-1000, 2010.
Ashrafi, K., Azadi M., Sabetghadam S., "Effects of various digital filter initialization methods on results of weather research and forecasting (WRF) mode," Iranian J. Geoph., vol. 5, no. 1, pp. 16-33, 2011.
Haggag M., Badry H., "Hydrometeoro-logical modeling study of tropical cyclone Phet in the Arabian Sea in 2010," Atm. Climat. Sci., vol. 2, pp. 174-190, 2012.
Shamarock, W. C., ., Dudhia J., Gill D. O., Baker D. M., Wang W., Power J. G., "A Deescription of the Advanced Research WRF Version 3. NCAR/TN-475+STR," NCAR Technical Note, vol. 22, no. 22, pp. 50-62, 2008.
Wang, W., Bruyere, Duda M., Dudhia J., Gill D., Lin H., Michalaes J., Rizvi S., Zhang X., "ARW version 3 modeling system user's guide," National Center for Atmospheric Research, USA, 2011.
Laprise R., "The resolution of the global spectral models," Bull. Amer. Meteor. Soc., vol. 73, no. 2, pp. 1453-1454, 1992.
How to Cite
Articles accepted for publication in Al-Mustansiriyah Journal of Science (MJS) are protected under the Creative Commons Attribution 4.0 International License (CC-BY-NC). Authors of accepted articles are requested to sign a copyright release form prior to their article being published. All authors must agree to the submission, sign copyright release forms, and agree to be included in any correspondence between MJS and the authors before submitting a work to MJS. For personal or educational use, permission is given without charge to print or create digital copies of all or portions of a MJS article. However, copies must not be produced or distributed for monetary gain. It is necessary to respect the copyright of any parts of this work that are not owned by MJS.