云南楚雄市的发展对气候及气象灾害的影响

Influence of City Development on Local Climate and Meteorological Disasters in Chuxiong City of Yunnan

以楚雄市气象站 1 978～ 2 0 0 0年的气候资料作为城市气候资料 ,以楚雄市西郊的南华气象站 1 978～2 0 0 0年的气候资料作为郊区气候资料进行对比分析 ,探讨楚雄市城市的发展对气候及气象灾害的影响 ,并揭示其变化规律。结果表明 ,进入 2 0世纪 80年代以来 ,楚雄市热岛效应和干岛效应日趋明显 ,随着楚雄城市的发展扩大 ,城区的气温逐渐升高 ,湿度逐渐减少 ,降水呈递增趋势 ,风速呈递减趋势。楚雄市城市发展对主要灾害性天气的影响表现为 ,城市的暴雨日数呈增多的趋势 ;大风发生次数逐渐减小 ,霜冻日数楚雄市区比郊区南华少 。

Chuxiong is a medium size city of Yungui plateau of Yunnan.By comparison of the data(1978 to 2000) of Yunnan Chuxiong and Nianhua observatory,it is found that the urban heat island effect and dry island effect in Chuxiong are getting more and more obvious since 1980's.The temperature of urban area is rising,humidity is reducing,rainfall is increasing,wind is getting weaker. Meanwhile,rainstorms increases,strong winds and frost weathers reduce.Chuxiong is a medium size city of Yungui plateau of Yunnan.By comparison of the data(1978 to 2000) of Yunnan Chuxiong and Nianhua observatory,it is found that the urban heat island effect and dry island effect in Chuxiong are getting more and more obvious since 1980's.The temperature of urban area is rising,humidity is reducing,rainfall is increasing ,wind is getting weaker. Meanwhile,rainstorms increases,strong winds and frost weathers reduce.