基于京津冀功能分区的植被覆盖度时空演变特征及其影响因子
鲁军景, 孙雷刚, 左璐, 刘剑锋, 马晓倩, 郝庆涛

A functional zoning-based study of the spatiotemporal evolutionary characteristics and influencing factors of vegetation fractional cover in the Beijing-Tianjin-Hebei region
LU Junjing, SUN Leigang, ZUO Lu, LIU Jianfeng, MA Xiaoqian, HAO Qingtao
图6 1985—2020年“4区”VFC变化趋势等级面积占比
Fig.6 The different grade area proportion of VFC change trend in "4 major functional areas" from 1985 to 2020