Figure 4
From: Pollen and spores as biological recorders of past ultraviolet irradiance
Assessing the impact of age model uncertainty in the pollen chemistry-insolation relationship.
Boxplots show the correlation coefficients (a) and p values (b) for correlations of mean within-sample phenolic concentrations against modelled total solar irradiance32 for the 21st of each month, from 1000 replicate Markov Chain Monte Carlo (MCMC)-derived age-depth models. The highest correlations occur in August to October, just before and during the Ghanaian grass flowering season30.
