【摘要】 甘肃陇中北部的景泰、靖远和会宁3县位于腾格里沙漠向黄土高原的过渡地区,该地区的气候类型代表了干旱区向半干旱区的过渡类型。研究对3县自1960-2008年的气候特征和气候生产潜力进行了统计分析,结果表明,该地区在1980年左右为气候的转折点;3县区的气候生产潜力会宁县最大,其次为靖远县,景泰县最小,多年平均值分别为:1 8981、738和1 531 g/(m2.a)。自1960年以来,3县的气候生产潜力年变化特征也不同,景泰县为先增加后降低,靖远县总体表现为降低的趋势,但不太明显,而会宁县表现为先降低后增加的趋势,同样变化不明显,变化时间在1984年左右,这与气候类型的变化趋势相似。更多还原

【Abstract】 Jingtai,Jingyuan and Huining counties are located in the middle part of Gansu Province,which is the transitional region between Tenggeli Desert and Loess Plateau with transitional climate between arid and semi-arid.Based on the meteorologica1 data from meteorological stations of Jingtai,Jingyuan and Huining from 1960 to 2008,the climate features and climate productivity potential were studied.The result indicated that the turning point of climate change was around 1980.The climate productivity potential in Huining was the highest,and followed by Jingyuan and Jingtai.The estimated values were 1 898,1 738 and 1 531 g/(m2·a) respectively.Since 1960,the climate change in 3 counties varied and was not significant.更多还原