FY-2D云导风在“鲶鱼”台风模拟中的同化试验

为了能给国内的云导风产品在通道的选择和使用方法上提供一些新的参考，以2010年的“鲶鱼”台风为个例，通过对FY-2D云导风产品在WRF模式中的同化对比试验，分析比较了同化了云导风资料之后的台风路径和位势高度场、风场的变化。结果表明，同化之后台风路径的偏差水汽通道要远大于红外通道，随着积分时间的延长，红外通道数据的加入对模拟台风路径的订正作用比水汽通道显著；模式使用不同同化方案的模拟结果也有明显的差别，其中以每24小时一次冷启动的同化循环方案对台风路径有较准确的模拟，而在分析不同通道导风质量优劣方面，则以热循环同化方案最佳。

Experiments of Assimilation with FY-2D AMV in the Simulation of Typhoon CATFISH

In order to provide a few of new references for channels selection and application of atmosphere motion vector（AMV）from FY-2D, the experiments are designed. Taking 2010 super typhoon CATFISH as a case, this paper analyses and contrasts the simulated results from WRF including simulative tracks, geopotential height fields and wind fields. Differences between the comparative experiments are clearly showing that： When AMV from IR-1 and IR-3 are assimilated, both of their simulative typhoon tracks have deviation to real. With the prolonging of integration time, typhoon track from IR-1 is getting closer and closer quite the contrary. There are two different schemes designed in to real case, and the other one which from IR-3 is assimilation cycle, and each of them is found to have its own advantages and disadvantages. The scheme with a cold start every 24 hours makes its simulative tracks matched well with the real case, and the warm cycle scheme without cold start can give a better analysis of superior or inferior for IR-1 and IR-3 AMV.