Relation of Chlorophyll Fluorescence Sensitive Reflectance Ratios to Carbon Flux Measurements of Montanne Grassland and Norway Spruce Forest Ecosystems in the Temperate Zone

Table 1

Vegetation indices (VIs) used in this study. 𝑅_𝜆 is reflectance at a wavelength λ in nm, [L.UE: light use efficiency; F_S: steady-state chlorophyll fluorescence; Chl_a+b total chlorophyll content].

Vegetation index	Designed as indicator of	Reference
PRI = (𝑅532.2−𝑅570.8)(𝑅532.2+𝑅570.8)	LUE, Zeaxanthin content,	[23]
R686.7/R630.0	FS, early stress	[50]
R740.0/R800.0	FS, early stress	[37]