Fig. 3From: Impacts of climate change on the gross primary production of Italian forestsCorrelation coefficients found between inter-annual variations of meteorological factors and GPP estimated by C-Fix and BIOME-BGC for the seven forest types during the 1999–2013 period. Panel a refers to spring minimum temperature, while b refers to SDS (** = highly significant correlations, P < 0.01)Back to article page