摘要
本文采用兰州1951—1990年历年各月平均气温资料,通过有关统计量的计算,分析了兰州月平均温度的演变特征。总的特点是:年均温五十年代前期较高,此后至六十年代缓慢下降,六十年代后期起在波动中上升,尤其是1985—1990年连续6年为正距平。40年来经历了暖—冷—暖的演变过程。冬季升温最为明显,夏季变化幅度较小。与五十年代相比,八十年代年均温上升0.5℃,冬、秋分别升高2.4℃和0.7℃,夏、春分别下降0.3℃和0.2℃。兰州气温变化有较好的持续性和周期性。其主要受大尺度环流、太阳黑子、城市发展及热岛效应等的影响。
The evolution characteristics of monthly mean temperature are analysed by using the monthly mean temperature data from 1951 to 1990 in Lanzhou. The main characteristics are as follows: the annual mean temperature was higher in the early fifties, then temperature dropped slowly until the sixties and the temperature rose fluctuantly in the late sixties. The temperature was the positive departure from 1985 to 1990. In recent 40 years, temperature evolution process was a warm-cold-warm processes, the temperature rpse obviously in winter and its amplitude was rather small in summer. Comparison between the temperature in the eighties and one in the fifties, the annual mean temperature rose 0.5℃ in the eighties, it rose 2.4℃ and 0.7℃ in winter and autumn, respectively and it dropped 0.3℃ and 0.2℃ in summer and spring, respectively. There are better persistence and the periodicity for the temperature variation in Lanzhou. Its variation is affected by the large-scale circulation, sunspot, urban devolopment and urban heat island effect.
出处
《高原气象》
CSCD
北大核心
1993年第1期18-26,共9页
Plateau Meteorology
关键词
气温
气候特征
城市
热岛效应
Air temperature
Climatological characteristics
Urban heat island effect
