伊犁地区近35年冬季积雪变化特征分析

Comparison Analysis of Snow Change Characteristic in Yili Region in recent 35 years

通过对伊犁地区8个气象地面观测站35a(1971—2005年)11—3月逐旬的冬季最大积雪深度、积雪日数、降水量和平均温度的统计分析,结果表明:伊犁地区冬季降雪的时间、空间分布不均,最大降雪发生在新源;平均雪深最大的是伊宁县,最小的是特克斯县;冬季积雪日数变化相对比较稳定;冬季降雪与平均温度存在着很好的响应关系。在SPSS中对冬季的平均温度与平均降水和平均雪深进行相关分析,发现平均雪深、平均温度和平均降水为显著正相关。

Combine with the maximum snow cover depth, the number of snow cover days, the air temperature and the precipitation of a period of ten days at 8 meteorological stations in Yili region from 1971 to 2005, and analysis their correlation by using SPSS software, the result showed that the correlation was significant at the 0.05 level. The snow cover depth was space-time maldistribution, the maximum snow depth was happened in Xinyuan, the maximum of average snow depth was Yining and the minimum was Tekes; the change of winter snow cover days was stabile, and the respond correlation between winter snow cover depth and average air temperature was significant.