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Heritage Science
Fig. 8 | Heritage Science

Fig. 8

From: Estimation of the historical dry deposition of air pollution indoors to the monumental paintings by Edvard Munch in the University Aula, in Oslo, Norway

Fig. 8

Indoor sink fractions of PM2.5 for filtration scenarios from the low (I/O = 0.5) (a), and high (I/O = 0.8) (b), I/O ratio scenario limits without filtration in the Aula before 1975, to the respective low (I/O = 0.1) and high (I/O = 0.4) I/O ratio scenario limits with filtration after 1975, calculated from Eqs. (2) to (5). The yellow arrows show the reductions in the fractions of outdoor PM2.5 ventilated to the indoor air depending on the I/O ratios without filtration before 1975 (I/O = 0.5 (a) and 0.8 (b)) and with filtration after 1975 (I/O between 0.1 and 0.4)

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