东北地区地温和冻结深度时空特征的细化分析
龚强,晁华,朱玲,蔺娜,于秀晶,刘春生,汪宏宇

Detailed analysis of spatial and temporal characteristics of ground temperature and frost depth in Northeast China
Qiang GONG,Hua CHAO,Ling ZHU,Na LIN,Xiujing YU,Chunsheng LIU,Hongyu WANG
图12 6个代表站最大冻结深度、冻结期年际变化
Fig.12 Interannual variations of maximum frost depth (a) and freezing period (b) at 6 representative stations