Environmental Engineering Reference
In-Depth Information
Figure 16.2 Ratio between average CAVA eruption (scenario 1%, 10% and
25% of emitted halogens reaching the stratosphere) and loading for: EESC, total
Cl (Cl
tot
), total Br (Br
tot
) (Daniel
et al
.,
2011
), applying 1980 values as a threshold
for pre-ozone hole conditions.
the EESC rises from 300% to 550%. In absolute concentrations, an average CAVA
eruption in 2015 would lead to 8 to 17 ppt total Br, assuming the 1% to 25%
estimate range, and 1.5 up to 9 ppb total Cl loading in the mid-latitude stratosphere
(
Figure 16.3b
), compared to only 7.5 ppt total Br and 1.1 ppb total Cl abundances
