we recorded many ecohydrological observations at a sparse grassland site on the southern periphery of the Eurasian cryosphere in Mongolia. Grass growth at the study site shows significant difference of biomass between drier and moister years. Seasonal change of PAR albedo is a good indicator of temporal change of biomass. The stresses of atmosphere and soil water to grass have been evaluated at the study site using index of air temperature stress degree-day (SDD) and soil water stress (SWS). SDD was small and…
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