Evaluation of planetary boundary layer schemes on weather research forecasting by using intensive observation at kototabang

Abstract

This study examined Weather Research and Forecasting (WRF) simulation with different closure type of Planetary Boundary Layer (PBL) in six PBL schemes. This study aimed to evaluate the performance of PBL scheme in representing the vertical profile of the atmosphere over Kototabang. Intensive observation during boreal spring in 2002 using radiosonde and Automatic Weather Station (AWS) provided were used to verify the results of WRF. Our finding showed that most of PBL scheme successfully simulated diurnal variations of PBL, temperature and relative humidity. However, the bias in magnitude were found during the daytime. This study shows that ACM2, applying mixed local and non-local closure type, performed more realistic temperature and relative humidity profile with minimum bias compared to other schemes.