【摘要】 利用兰州站和相邻的榆中站分别代表城市和乡村,采用其近50年逐日温度资料,应用周期分析方法,研究了两地气候变化特征及其周期性。结果表明:兰州年平均气温以0.34℃/10a显著升高,城市“热岛效应”显著,其变暖速率明显比临近乡村站快。规律性的工作日和双休日影响了城市气温变化,造成了明显的周末升温、7天周期的显著“周末效应”。更多还原

【Abstract】 Selecting the Lanzhou and Yuzhong stations represent urban and rural stations,respectively,using the day-to-day surface air temperature data in recent 50 years,the climate change characteristic and its periodicity of the two regions were researched by using the method of period analysis.The result shows that the mean annual air temperature of Lanzhou is increasing by 0.34℃/10a obviously,the city heat island effect is obvious,its warming speed is larger than of the country.The disciplinarian working day and double-rest days affect the change of city temperature,which result in the weekend temperature increasing,that is to say weekend effect of seven days.更多还原