浙江省近34年年平均风速序列均一性检验研究

采用标准正态检验(SNHT:Standard Normal Homogeneity Test)方法.对浙江省36个代表站1971～2004年的年平均风速资料序列进行均一性检验.结果表明:36站中有23个测站出现间断,其中因迁站原因造成非均一性的测站有13个,占非均一性总数的57%,环境变化原因有5个,占非均一性总数的22%;原因不明有3个,占非均一性总数的13%;测风仪高度变化、规定变更各为1个,占非均一性总数的4%.迁站是导致风速序列非均一性的主要原因.

Homogeneity Test of Annual Mean Wind Velocity Series from 1971 to 2004 in Zhejiang Province

By means of SNHT (Standard Normal Homogeneity Test) method, a statistical test is conducted on the mean annual wind velocity series of 36 weather stations from 1971 to 2004 in Zhejiang Province. It is found that interruptions existed in 23 stations of 36 samples, in which the heterogeneity in 13 stations is due to their relocation (at a proportion of 57%), in 5 stations due to the environment variation (22%), in one station due to the change of its wind observation equipment, another due to its observation regulation change (about 4%), and the reasons for interruptions in 3 stations are nor clear (13%). The relocation of stations is the main cause of heterogeneity in wind velocity data.