Table 1 Details of the explanatory variables for training the machine learning model.

From: A global urban tree leaf area index dataset for urban climate modeling

Explanatory variables

Description

Temporal resolution

Spatial resolution

Reference

Htop

ETH tree height

2020

10 m

Lang et al.36

LAI

Reprocessed MODIS LAI

2000–2022

500 m

Lin et al.20

Tmax

Monthly maximum air temperature

1970–2000 climatology

1 km

Fick and Hijmans35

Tmin

Monthly minimum air temperature

1970–2000 climatology

1 km

SW

Monthly incident shortwave radiation

1970–2000 climatology

1 km

Prec

Monthly precipitation

1970–2000 climatology

1 km

VP

Vapor pressure

1970–2000 climatology

1 km

VPD

Vapor pressure deficit

1970–2000 climatology

1 km

Zhang et al.40