Comparative Analysis on Impact of Different Cumulus Convective Parameterization Schemes in WRF on Rainfall Forecast Around Qingdao
Ma Yan
Gu Yu
Chen Shang
Dong Haiying
Abstract：Horizontal resolution of 1-10 km is a "gray belt"for weather or not to use the cumulus convective parameterization scheme in the mesoscale model.Five rainfall events in Qingdao are simulated using WRF model of horizontal resolution 9 km in Qingdao Meteorological Office with 3 cumulus convective parameterization schemes KF,GD and BMJ respectively,and the impact of different cumulus parameterization schemes on the forecast ability of rainfall in Qingdao is analyzed.The results showed that the 3 cumulus convective parameterization schemes had different forecast ability on different rainfall levels.BMJ did best for light rain,non-convective parameterization scheme did the best job for moderate rain and KF scheme took the second place.GD scheme was good for heavy rain and torrential rain.GD scheme performed well on the coastal stations and KF shown good performance on inland stations for the case of stability rainfall process.For convective rainfall process,BMJ did best no matter on coastal or inland stations.In the rainfall distribution,all schemes could simulate rainfall areas less than 50 mm in the case of stability rainfall process,and GD scheme did better for the rainfall areas more than 100 mm.In general,BMJ performed better in the case of convective rainfall process.
Keywords：WRFcumulus convective parameterization schemerainfallQingdao
Publication Date：2017-10-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：8( 19-26 )