Table 2 Datasets used in developing the SIF downscaling model.

Data source	Dataset	Derived variables	Spatial resolution	Temproal resolution	Available at
TROPOMI	TROPOMI SIF	SIF	ungridded	Daily	ftp://fluo.gps.caltech.edu/data/tropomi/
MODIS	MOD09A1	NDVI, NDWI, kNDVI, NIRv	500 m	8-day	https://search.earthdata.nasa.gov/search?q=MOD09A1
	MOD11A2	LST_day, LST_night	500 m	8-day	https://search.earthdata.nasa.gov/search?q=MOD11A2
	MOD15A2H	FPAR	500 m	8-day	https://search.earthdata.nasa.gov/search?q=MOD15A2H
	MCD12C1	Land cover	500 m	Yearly	https://search.earthdata.nasa.gov/search?q=MCD12C1
	MOD09GA	cos (SZA)	500 m	Daily	https://search.earthdata.nasa.gov/search?q=MOD09GA
ERA5-Land	soil moisture	SM	0.1°	hourly	https://doi.org/10.24381/cds.68d2bb30
ERA5-Land	temperature、dewpoint temperature	VPD	0.1°	hourly	https://doi.org/10.24381/cds.68d2bb30
DEM	SRTM DEM	DEM, aspect, slope	30 m		https://ers.cr.usgs.gov

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