摘要
基于成都市及其所辖13个区(市)县气象站近49年气象要素资料和成都市城市环境变化相关资料,分析研究了近49年来城市化进程中成都市气候变化特征。结果表明,在20世纪90年代初,成都市气候发生了转折性的变化,出现明显的热岛效应和干旱岛效应;90年代中后期～2008年年降雨量呈明显减少趋势,市区降雨减少量明显大于郊区降雨减少量;在主汛期(6～9月)市区降雨量略大于郊区,暴雨和大暴雨个数均有所减少。以上变化的原因有:城区人类活动频繁,向大气中排放了大量的气溶胶颗粒物,增加了降水的凝结核。在夏季,市区上空增多的降水凝结核以及相对较高的下垫面温度,更有利于形成降水。
Based on the meteorological data involving in the recent 50 years,the climate variation characteristics of Chengdu City in urbanization was analyzed. The results showed that in the early of 1990s ,the heat island effect and the dry island effects were obviously appeared. The precipitation at the end of 1990s to 2008 had a significant decrease. At the main flood season the rainfall in urban district was a little bigger than in the suburb. The possible reasons are frequent human activities in urban district result to large amount of aerosol particles,which increase the condensation nucleus and are beneficial to form more precipitation.
出处
《安徽农业科学》
CAS
北大核心
2010年第30期17092-17094,17121,共4页
Journal of Anhui Agricultural Sciences
关键词
城市化
气候
变化特征
Urbanization
Climate
Variation characteristic
