WRF模式中积云对流参数化方案对南海土台风“Ryan”模拟的影响研究

The Impact of Different Cumulus Parameterization Schemes of the WRF Model on the Typhoon “Ryan” Simulation over the South China Sea

为了研究数值模式中不同积云对流参数化方案对南海土台风模拟的影响,以T9514号南海土台风"Ryan"为例,利用中尺度WRF-ARW模式(版本3.7.0)作对比试验,分析比较使用不同积云对流参数化方案模拟的台风路径、强度和相关物理量。结果表明,由Kain-Fritsch (KF)方案模拟得到的台风路径有北折过程,台风移速较快,台风强度较弱;由Betts-Miller-Janjic (BMJ)方案模拟得到的台风移动速度快,台风中心对流强,台风强度较强;由Tiedtke (TDK)方案模拟得到的台风路径最接近实况路径,台风强度较弱。

In order to study the impact of simulating the typhoon with different cumulus convective parameterization schemes.Taking typhoon T9514'Ryan'developed over the South China sea in 1995 as a case,this report analyses and contrasts the results of different cumulus convection parameterization schemes on the simulating experiments from WRF-ARW mode(version 3.7.0)including the simulative tracks,intensity and other physical quantities.The results show that the typhoon track simulated by Kain-Fritsch(KF)scheme has the north folding process,the typhoon moves faster with more precipitation and the intensity is weaker.The Betts-Miller-Janjic(BMJ)scheme experiment shows that the track is ahead of the best track,the convection of the typhoon center is stronger with stronger intensity.In the results of the Tiedtke(TDK)scheme experiment,the typhoon track is very close to the best one,but the typhoon intensity is weaker.