温江站气候资料非均一性检验及订正

Inhomogeneity Test and Adjustments of Meteorological Data at Wenjiang

为研究人为因素导致的＂不连续点＂对气候序列均一性的影响,以四川省温江地面观测站为例,结合历史沿革资料,采用标准正态均一性检验法（SNHT法）、Buishand均一性检验法、Pettitt均一性检验法分别对该站1960~2009年平均、最高和最低气温、气温日较差、相对湿度、降水、1mm雨日观测序列作均一性检验分析,并利用逐步回归法对不均一序列进行订正。发现迁站和城市化效应对气象要素的均一性产生影响,其中台站迁移对于气温、相对湿度序列的影响较明显,而对降水量的影响则不显著。订正后平均气温增温速率为0.116℃/（10a）,变暖幅度增大;相对湿度订正后倾斜率为0.085/（10a）,降幅减弱。研究表明不同要素的均一性受到迁站等因素影响程度各不相同,需要进一步区别分析。

To study the ＂discontinuity＂ impact to sequence uniformity of the climate induced by artificial factors,this paper makes use of the metadata of in situ observation at Wenjiang（56187） of Sichuan Province,and applies SNHT,Buishand and Pettitt homogeneity test method to analyze the data from 1960 to 2009 such as annual mean,maximum and minimum temperatures,diurnal temperature,relative humidity,and precipitation 1mm rain days,solar duration time series,etc.The stepwise multiple linear regression method was employed to revise the inhomogeneity of time series.Experiments show that the influence of station relocation and urbanization to the homogeneities of different meteorological variables is notable,and is of great contribution to the temperature and the humidity on the contrary.Results of the adjustment indicate that the annual temperature increased at a faster rate,which resulted in a strong increase in the long-term diurnal temperature range and its increasing rate was 0.116℃/10 yr.At the same time,the relative humidity tilt rate is 1.006/（10） by a weakened.The solar duration time series reducing rate was 0.058h/10 yr.The results show various ＂non-climate＂ factors on different meteorological variables are different and needs further research.