【摘要】 以全球变暖为主要特征的气候变化已成为当今世界重要的环境问题,庆阳市是全球气候变化敏感的区域之一。为了探索环保新模式、推动人与自然和谐发展。利用庆阳市8个气象观测站1971—2020年连续50 a的气象资料,采用气候倾向率、累积距平、回归分析等方法,分析了庆阳市气候变化基本特征。结果表明,50年内庆阳市年平均气温呈上升趋势,平均升高速率为0.32℃/10 a,变暖幅度高于全球和全国平均水平;各季均增温明显,其中春季、冬季升温幅度最大,夏季、秋季升温幅度较小。年平均降水量呈波动增加趋势,平均增加速率为14.5 mm/10 a;各季变化趋势不一,夏季、秋季、冬季呈增加趋势,春季呈减少趋势。日照时数呈减少趋势,平均减少速率为24.6 h/10 a;春季为增加趋势,夏季、秋季、冬季为减少趋势,日照时数的季节变化与降水的季节变化呈显著负相关。整体气候由寒旱向暖湿转化,极端天气气候事件趋多趋强,与西北地区的气候变化趋势一致。更多还原

【Abstract】 Global warming as the main characteristics of the climate change has become a crucial environmental problem worldwide, Qingyang is one of the regions sensitive to global climate change. To explore a new model of environmental protection and to promote the harmonious development of man and nature, meteorological data of 8 meteorological observatories from 1971 to 2020 for 50 years were used in this study, climate trend rate, cumulative anomaly, regression analysis and other methods were applied to analyze the basic characteristics of climate change in Qingyang City. The results showed that the annual mean temperature in Qingyang has been increasing over the past 50 years with an increase rate of 0.32 ℃ every 10 years, which was higher than the global and national average. The temperature increase in each season was obvious, and the temperature rise in spring and winter was the highest, while the temperature rise in summer and autumn was less. The annual mean precipitation increased by 14.5 mm every 10 years. The seasonal variation trend was different and showed increase in summer, autumn and winter and decrease in spring, the sunshine duration decreased by 24.6 hours every 10 years, an increasing trend in spring, and a decreasing trend in summer, autumn and winter were detected. The seasonal variation of sunshine duration was also negatively correlated with that of precipitation(P < 0.05).The overall climate changed from cold and drought to warm and wet, and extreme weather and climate events became more and more intense, which was consistent with the trend of climate change in northwest area.更多还原