润湿时间统计方法研究

The study of statistical methods for Time of wetness

根据日记相对湿度曲线,本文采用了五种方法统计江津地区1998年逐月的润湿时间;五种方法的区别主要在于:(1)相邻两点时间间隔不同,方法2、方法3相邻两点间隔1h,方法4、方法5相邻两点间隔6h;(2)若相邻两点的相对湿度值一个高于80%,另一个低于80%时,则采用了三种不同的方法计算从低点到高点相对湿度低于80%的时间,方法1直接从曲线读取,方法2、方法4则从相邻两点的相对湿度值计算获得,方法3、方法4则取相邻两点间隔时间的一半。方差分析表明五种方法之间没有显著差异,可直接利用国家气象局发布的全年每天2、8、14、20点的相对湿度来统计润湿时间。

The TOW values in JiangJin were calculated using five methods from daily RH curve. The difference of the five methods is that the time interval of adjacent points is differ, method 2 and method 3 are one hour, method 4 and method 5 are six hours; and that if the RH value for one of adjacent points is higher than 80% and another is lower than 80%, then adopting three different methods calculate the time of rather humidity being lower than 80% from lowly point to high point, method 1 calculate direct from curve, method 2 and method 4 calculate from the RH values of adjacent points, method 3 and method 5 are a half of interval. Analysis of variance is showed it isn't differ from among the five methods, so that the TOW can be calculated from the daily rather humidity National Weather Bureau publicized