气象站迁站前后气温同期观测资料对比

通过对山东省东阿县新旧地面气象观测站同期(2008年1、4、7月)气温观测资料对比分析,发现两站之间气温存在明显的正温差,旧测站气温存在城市热岛效应。这种效应夜间大于白天,冬、春(秋)季较为明显,夏季最小;城市热岛效应使最低气温下降,从而减小气温日较差,故旧测站气温较高;统计检验表明,旧测站与新测站气温存在显著的正相关,但两地气温差异显著,两地气温资料已经不适合合并计算。所以,对于旧测站的气温记录,应做出必要的订正后,才能得到较准确的代表当地气温的统计资料。

Comparative Analysis of Synchronously Observed Temperature Measurements before and after Station Move

By analyzing the synchronously observed temperature data （January, April, July 2008） from the new and old meteorological observation stations in Dong＇ e, it is found out that temperature in the old station was higher than that in the new station because of urban heat island effect, which was more obvious at night than in the daytime, more obvious in winter, spring, and autumn than in summer. The urban heat island effect decreased minimum temperature and so reduced the diurnal temperature range at the old station, which thus increased the statistical temperature. The analysis shows that temperature in the old station had a positive correlation with that in the new station; meanwhile there was obvious difference between temperatures in the old and new stations. As a result, there is discontinuity in the air temperature data from the old and new stations. The old temperature measurements cannot be used along with the new to represent the temperature of Dong＇e without appropriate correction.