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本文应用近 50年的实测资料 ,计算分析了定西市的气候生产力 ,结果表明 ,全市气候生产力西片最大 ,南片次之 ,东片最小。气候生产力年际波动西片最大 ,东片次之 ,南片最小。 50年代、60年代气候生产力最高 ,90年代气候生产力最低。气候生产力的变化趋势是全市都在下降 ,西片以每年 9.4kg/h 幅度在下降 ,南片以每年7.5kg/h 幅度在下降 ,东片以每年 5.6kg/h 幅度在下降。同时还发现气候生产力的变化具有阶段性 ,其中南片分界点在 1 985年 ,西片降幅分界点在 1 979年 ,东片在 1 968年。以每年 5 .6kg/h 幅度在下降。
In this paper, the measured data of nearly 50 years are used to calculate and analyze the climate productivity of Dingxi City. The results show that the climate productivity of the city is the largest in the west, the second in the south and the smallest in the east. Climate Productivity is the largest among the western films, with the second being the East and the South being the smallest. In the 1950s and 1960s, climate productivity was the highest and climate productivity was the lowest in the 1990s. The trend of climate productivity changes is the city is declining, the annual decline of 9.4kg / h in the west, 7.5kg / h in the south and the 5.6kg / h in the east. At the same time, it is also found that the change of climate productivity is of a stage, in which the demarcation point of the south slice is in 1985, the decline point of the west slice is in 1979 and the east slice is in 1968. The annual rate of 5.6kg / h is declining.