Figure 4-8: Northern Hemisphere total O3 column change
as a function of surface area density (SAD) between 14-21 km and 33-90�N.
Calculations are for EI(NOx)=5 and an HSCT fleet size of 500 aircraft in the
2015 atmosphere. The 27, 38, 82, and 111% change in SAD correspond to SA7,
SA5, SA1, and SA3 as listed in Table 4-9, respectively.
