利用1970-2004年山西省71个气象观测站02:00时、14:00时平均温度资料,分析全省昼、夜温度气候倾向率,选取具有代表性的7个城市站和7个乡村站,研究热岛效应对城市昼夜温度的影响.结果表明:(1)近35年来,山西省各站气温倾向率多为正,即呈增温的趋势,但空间分布不均.(2)夜间气温倾向率城市站大于乡村站,白天气温倾向率城市站小于乡村站.(3)城市效应对城市昼、夜增温贡献率分别为-16.15%、33.01%.山西省城市发展对昼夜环境温度影响是不对称的.%The change characteristics of temperature at 02:00 and 14:00 in Shanxi has been investigated using temperature data measured at 71 observation stations from 1970 to 2004. Seven urban stations and seven rural stations were chosen to investigate im-pact of urban heat island on day and night temperature. The conclusion can be drawn as following: (1) The temperature bias rates are positive, but the spatial are non-symmetrical in the last 35 years. (2) The warming trend of night temperature for urban stations was higher then for rural stations, The warming trend of day temperature for urban stations was lower then for rural stations. (3) The con-tribution of heat island effects to the day temperature warming is -16.15% and to the night temperature warming is 33.01%. Impact of urban heat island on the day and night temperature changes have obvious asymmetric characteristics.
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