云南高原楚雄市干湿度变化分析

Analysis of Dryness and Humidity Change in Chuxiong

本文利用楚雄市1971—2007年37年的年降水量和相对湿度等资料,计算了楚雄市降水距平百分率并分析了37年来楚雄市干湿变化,结果表明楚雄市降水呈波动的状态,楚雄市降水量的近10年平均值有所增加,通过计算发现楚雄冬、春季节比较干燥,夏、秋季节比较湿润,楚雄市多数年份的气候属于干旱型。通过城市与郊区的对比分析发现城市降水量和相对湿度有别于郊区,原因是下垫面性质的不同,提出了针对楚雄市的干旱防御措施。

Using the 37 years annual precipitation and relative humidity data of Chuxiong from 1971 to 2007,it calculates the precipitation anomaly percentage and analyses the drought-wet change of Chuxiong during the 37 years,the results show that the precipitation in Chuxiong fluctuates,the 10-year average precipitation has increased during the recent 30 years.Through the calculation we find it is comparative dry in winter and spring season in Chuxiong,while wet in summer and autumn.Through further calculation,we find it is dry climate in most years of Chuxiong.Through the comparative analysis of Urban and rural areas,it can be found that the precipitation and relative humidity of the city are different from that of the rural areas which dues to the different surface.