Figure S1 . Variation of (a) N2O, (b)
HNO3, (c) HCl, (d) ClO and (e) O3 volume
mixing ratio (vmr) from 2004-2020 from Microwave Limb Sounder (MLS)
observations and model run CNTL averaged from
63oN-90oN equivalent latitude at 480
K (approx. 18 km). The model was sampled daily at the same local time as
the MLS observations. Panels (c)-(e) also show results from simulation
ODS95; these results are not included in panels (a) and (b) as they are
indistinguishable from simulation CNTL.