| Based on the temperature data in Minqin from 1956 to 2000,this paper analyses the inter-annual temperature variation trend for 45 years and their seasonal differences using non-parametrical method.The results indicate:(1) the annual average temperature in Minqin has been ascending since 1960s.The minimum of annual average temperature which was 6.5℃ emerged in 1967,and then the temperature went up unevenly.The temperature in 1990s was 1.2℃ higher than that in 1960s.(2) There were seasonal differences on variation of temperature.The temperature in Spring、Autumn and Winter was ascending and their temperature increases were significant at 0.05 level.The temperature contribution was large in winter,and then followed by autumn and spring.The contribution of summer to annual average temperature was the minimum;the reason was probably that the ascending temperature was counteracted by the much rainfall;more reasons were still to be discussed in the future.In addition,we also briefly analyze the reason of air temperature change in Minqin. |