1961 - 2016年秦岭山区冷季积雪日数变化特征及其影响因子
李茜, 魏凤英, 雷向杰

The variation characteristics of snow cover days and its influencing factors in cold season in the Qinling Mountains from 1961 to 2016
Qian LI, Fengying WEI, Xiangjie LEI
图7 秦岭各区冷季积雪日数的小波周期变化
Fig.7 The wavelet periodic variations of the snow cover days in the cold season in Zone Ⅰ (a), Zone Ⅱ (b), Zone Ⅲ (c), Zone Ⅳ (d) and Zone Ⅴ (e) in the Qinling Mountains