【摘要】 以中尺度数值预报模式MM5为基础,将其降水预报结果提供给地理信息系统ArcInfo平台,各气象站点降水预报结果被转换成数据点图层,然后通过样条插值法生成网格图层,再与具有甘肃省、市、县级边界以及各县乡镇点位置的基础数据图层叠加,用不同颜色表示预报降水量级的大小,最后分区、县及落点三级标准分别生成甘肃降水预报精细化产品。通过实例检验,表明该产品无论在降水分布、量级,还是降水趋势的预报上均与实况基本吻合,对过程降水、局地强对流天气及定点、定量、定时降水预报均有一定的参考价值。这样,将降水预报产品与地理信息系统GIS相结合,不但实现了甘肃降水预报产品的数字化和可视化,而且精度高、效果好。更多还原

【Abstract】 Based on the mesoscale numerical model(MM5),the precipitation forecast products were imported to ArcInfo′s flat-top of geographic information system(GIS) on which precipitation forecast of meteorological station exported by MM5 modle was transformed to layers of data-point.Then grid layers produced by spline interpolation overlapped the basis-data layer with the boundaries of the province,city and county levels in Gansu,and with the different colors show different rainfall.As a result,precipitation forecast′s precise products of Gansu was exported respectively according to region,county and falling area.It is proved that these fineness products are not only close to facts on spatial distribution,precipitation,and tendency of precipitation,but also useful for forecast of storm precipitation,local severe convective weather and precipitation at stations.It makes numerical,material and video precipitation products of Gansu true through binding forecast production in GIS.The method is of high resolution and great effects,makes precipitation forecast of Gansu accurate to town-level.So it is valuable and credible to plough into daily operation.更多还原