帕尔默旱度指数方法在全国实时旱情监视中的应用

Application of Palmer drought severity index method to real time drought survey in China

摘要: 在进一步修正的帕尔默旱度指数月模式的基础上研制了帕尔默旱度指数日模型,同时采用了权重帕尔默旱度指数方法实现了逐日帕尔默旱度指数计算。经过对全国556个气象测站的参数调试,建立了全国范围帕尔默旱度指数实时业务应用系统,一年多的运行表明,帕尔默旱度指数确实能够较好地及时反映实时旱涝情况和变化过程。

Abstract: In order to use the Palmer drought severity index method(PDSIM)in the real-time large scale drought survey,the Palmer modified drought index(PMDI)of daily model is developed based on the further modification of the PDSIM by Liu Wei-wei etc.(2004).After the initial parameters adjustments of 556 weather stations scat ered in China,the countrywide daily PMDI calculation system is established.The results of one yearcs operation show its validity,and it can describe in time the large scale drought situation and its evolvement.