秦皇岛探测环境变化对气象要素的影响

The Effects of the Change of Observational Environment on Meteorological Factors in Qinhuangdao

为分析秦皇岛地面气象探测环境变化对气象要素的影响,采用距平百分率和线性倾向估计及趋势系数等方法,对秦皇岛气象站(54449)新、旧站址搬迁前后1989—1998、1999—2008年各10年,与没有迁站的昌黎站做同期资料比较,结果表明:秦皇岛探测环境变化对气象要素有显著影响:年平均气温、年极端气温较迁站前显著下降,相对湿度增大,日照时数明显减少,雾日增多。指出气象要素变化除具有随时间变化的共同差异外,主要受探测环境变化的影响。

By using weather data which was in a stable environment in Changli county as reference,the meteorological observation data of Qinhuangdao are compared in the 10 years before 1999,and in the 10 years after 1999,the effects of the environment of the meteorological observation on weather factors over the ground. Adopting some methods, such as anomaly percentage, the estimation of linear trend and the estimated coefficient of the linear tendency. The results show that the change of the environment of meteorological observation can obvious affect the weather factors. Some factors with remarkable changes are mainly annual mean temperature, annual extreme temperature, relative humidity, sunshine-hours, fogdays, etc.