Table 1 Data sources of remote sensing indicators and associated ecological factors.

From: Vegetation dynamics and associated driving mechanisms in the water source area of the central route of the South-to-North Water Diversion, China during 2000–2022

Category

Data

Unit

Temporal resolution

Spatial resolution

Data source on GEE

Time periods (year)

Remote sensing indicator

Normalized difference vegetation index (NDVI)

/

16-Day

250 m

ee.ImageCollection("MODIS/006/MOD13Q1")

2000–2022

Terrain

Digital elevation model (DEM)

m

/

92.77 m

ee.Image("MERIT/DEM/v1_0_3")

/

Climate

Land surface temperature (LST)

°C

Day

1000 m

ee.ImageCollection("MODIS/006/MOD11A2")

2000–2022

Precipitation (PRE)

mm

Day

0.05°

ee.ImageCollection('UCSB-CHG/CHIRPS/DAILY’)

2000–2022

Surface net solar radiation (SNSR)

J/m2

Month

0.1°

ee.ImageCollection('ECMWF/ERA5_LAND/MONTHLY_AGGR’)

2000–2022

Wind speed (WS)

m/s

Month

0.1°

ee.ImageCollection("ECMWF/ERA5_LAND/MONTHLY_AGGR")

2000–2022

Soil

Soil water (SW)

kg/m3

Month

0.1°

ee.ImageCollection("ECMWF/ERA5_LAND/MONTHLY_AGGR")

2000–2022

Social economy

Land cover types (LC)

/

Year

1

ee.ImageCollection('MODIS/061/MCD12Q1’)

2001–2022

Water bodies (WB)

/

Year

30 m

ee.ImageCollection('JRC/GSW1_4/YearlyHistory’)

2000–2022

Human footprint (HFP)

/

Year

1000 m

Mu et al., 2022

2000–2020