汾河流域灰绿空间对季节PM2.5 的非线性影响及阈值效应
邓椿, 聂桐, 张仲伍, 孙维峰

Seasonal variations and threshold effects of gray-green space on PM2.5 in the Fenhe River Basin
Chun Deng, Tong Nie, Zhongwu Zhang, Weifeng Sun
图4 灰绿空间综合指标的空间特征
Fig.4 Spatial characteristics of the integrated index for grey-green space