Skills of different mesoscale models over Indian region during monsoon season: Forecast errors

Journal of Earth system science

Saji Mohandas1¹  Gopal Raman Iyengar1¹  Someshwar Das1 2¹  Surya Kanti Dutta1¹  Raghavendra Ashrit1¹  John P George1¹  E N Rajagopal1¹  M Das Gupta1¹ 

[1]National Center for Medium Range Weather Forecasting, Noida, India.$$

关键词: Mesoscale;    modeling;    monsoon;    forecast;    errors;    atmospheric sciences;    meteorology.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

Performance of four mesoscale models namely,the MM5,ETA,RSM and WRF,run at NCMRWF for short range weather forecasting has been examined during monsoon-2006.Evaluation is carried out based upon comparisons between observations and day-1 and day-3 forecasts of wind,temperature,specific humidity,geopotential height,rainfall,systematic errors,root mean square errors and specific events like the monsoon depressions.It is very difficult to address the question of which model performs best over the Indian region? An honest answer is ‘none ’.Perhaps an ensemble approach would be the best.However, if we must make a final verdict,it can be stated that in general,(i)the WRF is able to produce best All India rainfall prediction compared to observations in the day-1 forecast and,the MM5 is able to produce best All India rainfall forecasts in day-3,but ETA and RSM are able to depict the best distribution of rainfall maxima along the west coast of India,(ii)the MM5 is able to produce least RMSE of wind and geopotential fields at most of the time,and (iii)the RSM is able to produce least errors in the day-1 forecasts of the tracks,while the ETA model produces least errors in the day-3 forecasts.

【 授权许可】

Unknown