图4. 新疆冬季最大积雪深度变化趋势空间分布(1961—2017年)●表示通过α=0.05的显著性检验, ○表示未通过α=0.05的显著性检验
Fig.4. Spatial distribution of maximum snow cover depth variation in Xinjiang from 1961 to 2017The filled circle represents pass the test of significance and the hollow circle represents failed