Table 2 The relationship between three indexes (LSI, NDVI, area) and the cooling extent of UGV.

From: Strong contributions of local background climate to the cooling effect of urban green vegetation

City

Tree-covered UGV

Grass-covered UGV

LSI

NDVI

Area

LSI

NDVI

Area

Beijing

0.124**

0.196**

0.236**

0.750**

0.209**

0.191**

Tianjin

0.167**

0.165**

0.230**

0.065

0.307 **

0.289**

Tangshan

0.640

0.144**

0.177**

0.127 *

0.223**

0.257**

Xi’ an

0.116**

0.119**

0.191**

0.170

0.204**

0.065

Rome

0.042

0.170**

0.114**

−0.077

0.360**

−0.023

Florence

0.129*

0.198 **

0.238**

−0.066

0.142

0.198*

Lisbon

0.028

0.266**

0.297**

0.061

0.196*

0.187

Milan

0.060

0.072

0.039

−0.181

0.263**

−0.048

  1. *Correlation is significant at the 0.05 level (2-tailed).
  2. **Correlation is significant at the 0.01 level (2-tailed).
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