The Relationship between Polar Vortex and Ozone Depletion in the Antarctic Stratosphere during the Period 1979–2016

Figure 7

Composite anomalies of September-October total column ozone (units: DU) in (a) high-value PVBTI years and (b) low-value PVBTI years. (c) Composite difference of total column ozone (units: DU) between high-value and low-value PVBTI years. Dotted areas show significant changes at 95% level, estimated by local Student’s -test.

(a)

(b)

(c)