Comparison of precipitation forecast in central China with differentboundary layer parameterizations

By using three different PBL schemes (YSU, ACM2, MYJ) in numerical prediction system in central China, the precipitation forecast from May to July in 2012 is analyzed. Comparisons of the distribution of total rainfall indicate that all three PBL schemes can result in the overall characteristics of precipitation distribution, but exhibiting differences in detail. The TS scores and Biases scores show that the ACM2 are better than YSU and MYJ. The atmospheric temperature and moisture structures reflect a weak turbulent mixing in the MYJ, and results of the ACM2 and YSU are similar because they use nonlocal closure theory. A southwest vortex is tested, where ACM2 performs the best in precipitation, track and intensity of the southwest vortex.