互助站迁站前后气温序列均一性检验及订正

Homogeneity Test and Correction of Temperature Series Influenced by Station Movement at Huzhu

气象台站的迁移常导致气候序列的非均一性。本文对互助站迁站前后气温序列作均一性检验及订正。采用t检验和SNHT法,对互助站迁站前后的气温序列进行均一性检验,结果表明站址迁移对互助站温度序列均一性的影响非常显著。对差值法、一元线性回归、逐步多元线性回归以及确立订正方程式的参考站平行资料年限对互助站气温序列订正效果进行分析,结果表明用参考站15年平行观测资料建立的逐步多元线性回归订正效果较好。用逐步多元线性回归法对互助站迁站前的气温序列进行订正,经订正后互助站气候倾向率为0.31℃/10a,消除了序列的不均一现象。

Meteorological station movement often leads to inhomogeneity of climate series.In order to study the homogeneity test and homogenization methods of single-station temperature series,improve the reliability of temperature data series at Huzhu meteorological station,the homogeneity test and correction are conducted before and after the Huzhu meteorological station movement based on the t-test and SHNT methods.The results show that impact of the Huzhu meteorological station movement on the homogeneity of temperature data series is significant.The adjustment results based on different methods（i.e.,linear regression,stepwise multiple linear regression,and parallel data of basic stations）are analyzed.The results show that the correction result of the stepwise multiple linear regression based on 15-years parallel observation data in basic station is better.The correction is conducted on the temperature data series before moving on the basis of the stepwise multiple linear regression.The climate tendency rate is 0.31℃/10 aafter correction,and the inhomogeneity of temperature series can be eliminated.