Applicability of RAMS for a simulation of wind and temperature fields in Bang Pakong area, Thailand

The Regional Atmospheric Modeling System (RAMS) was used to simulate historical wind and temperature fields in Banc, Pakong area in order to support photochemical air quality modeling system during a summer and a winter time. High resolution datasets of Digital Elevation Model (DEM), global monthly Sea Surface Temperature (SST), and global reanalysis data from NCEP/NCAR were used as a part of the archived global analysis for preparation of geo-terrestrial process. The studied domain covered the Central and Eastern regions of Thailand. The model setup included one-way with nesting grid of Bang Pakong area using typical physical parameters. The configurations of each domain; time steps and grid resolution, were varied. The result showed that RAMS can be applied to simulate the historical meteorology (wind and temperature fields) of complex terrain and land/sea breeze. The statistical evaluation was tested in an average basis at the ground surface and found acceptable agreement between available observation and simulation results. Data assimilation by nudging analysis was then used with Thailand's weather information obtained from Thai Meteorological Department (TMD) to improve modeling simulations. These techniques showed an increase in modeling performance and a reduction on the deviation between meteorological observation and simulation. Data assimilation technique was found to be applicable in modeling improvement of wind speed, wind direction, and temperature.