Interactive comment on “Atmospheric effects of volcanic eruptions as seen by famous artists and depicted in their paintings” by C. S. Zerefos et al
نویسنده
چکیده
The authors’ idea to use paintings to reconstruct time series of volcanic eruptions is highly ingenious. It is probably one of the most interesting applications of libRadtran so far and I admire the amount of work put into this analysis, by collecting this huge number of paintings and retrieving ancillary information such as the solar zenith angle etc. For the analysis the authors calculated red/green (R/G) irradiance ratios and compared them to values derived from paintings. The model-calculated R/G ratios were systematically lower than the observed ones (Figure 3 of Zerefos et al (2007)) in fact, the modelled ratio was almost always smaller than 1, indicating a blue or grey color rather than red. For that reason, the observed R/G values had to be reduced by 30% to be comparable with the model. On the other hand, the retrieval procedure (Figure
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