基于ArcGIS Analyst平台， 采用协同克里格(CoKriging)插值方法， 对1979—2008年甘肃省旬平均气温进行了空间插值， 得到1 km×1 km各旬的平均气温表面数据。第36旬气温插值结果的平均误差、 均方根误差、 平均标准差、 标准化平均误差和均方根标准差的平均分别为-0.00046， 1.998， 1\^809， 0\^0035和1.087 ℃。利用插值计算结果和气象站观测数据， 分析了旬、 月和年平均气温的时空变异特征\.结果表明, 空间上东南部地区的气温变异较小， 其他地区的变异较大； 时间上第23-24旬\, 第24-26旬\,  第25-27旬\,  第33-35旬和第34-36旬的平均气温呈平稳下降趋势， 第4-6旬\,  第5-7旬\,  第6-8旬\,  第7-9旬和第8-10旬的平均气温呈平稳上升趋势， 7月气温呈不显著下降趋势， 3， 5和10月的平均气温略呈上升趋势。1979—2008年甘肃省的年平均气温为8.05 ℃， 3年滑动平均最低气温（1983—1985年）为7\^13 ℃， 最高气温（2005—2007年）为8.82 ℃， 气温上升趋势较为明显。

Based on the ArcGIS Analyst platform, the ten-day mean air temperature in Gansu Province during 1979-2008 is analyzed by the CoKriging method with spatial interpolation, and 1 km×1 km surface data of  ten-day mean air temperature are obtained. The results show that the averages of mean error, root mean square error, mean standard deviation, standardized mean error and root mean square standard deviation are -0.00046, 1.998, 1.809, 0.0035 and 1.087 ℃, respectively. According to the characteristic of spatial-temporal differentiations of ten-day, monthly and annual mean air temperatures, it is found that there is lesser differentiation in the Southeast, and larger in other region in space. The trend of ten-day mean air temperature has been steadily dropping in the periods of the 23th-24th, the  24th-26th,  the 25th-27th, the  33th-35th and the  34th-36th, in contrast, it has a steadily decreasing trend in the periods of  the 4th-6th, the  5th-7th, the  6th-8th, the  7th-9th and the  8th-10th. Moreover, the monthly mean air temperature appears slight descendent trend in July and slight ascendent trends in March, May and October. The annual mean air temperature in Gansu Province in 1979-2008 is 8.05 ℃. The minimun temperature of 3-year running mean in 1983-1985 is  7\^13 ℃ and the maximum temperature, 8.82 ℃,  which has obviously ascendent trend.