Fig. 2From: Impacts of climate change on the gross primary production of Italian forestsEvolution of GPP obtained by C-Fix and BIOME-BGC for the seven FTs in Italy during the years 1999–2013. The letters indicate the corresponding forest types: a Mediterranean macchia; b plain/hilly conifers; c evergreen oaks; d deciduous oaks; e, chestnut; f, beech; g, mountain conifers. The statistics of each model are referred to the linear GPP trend on the sequential year, considering 1999 as year 1; the last statistics are referred to the model inter-comparison (** = highly significant correlations, P < 0.01)Back to article page