Figure 2
From: Intra-annual density fluctuations in tree rings are proxies of air temperature across Europe
Variation in the frequency of IADFs as a function of tree-ring width (TRW) in gymnosperm and angiosperm tree species. (a) IADFs frequency as a function of tree-ring width in gymnosperm species (y = − 0.0012x2 + 0.6306x − 59.101; p < 0.05). (b) IADF frequency as a function of tree-ring width in angiosperm species (y = − 0.0008x2 + 0.287x + 0.1009; p < 0.05).
