Different Relationships between Arctic Oscillation and Ozone in the Stratosphere over the Arctic in January and February

We compare the relationship between Arctic Oscillation (AO) and ozone concentration in lower stratosphere over during 1980–1994 (P1) 2007–2019 (P2) January February using reanalysis datasets. The out-of-phase AO is significant P1 P2, but it insignificant P2 P1. variable links are not caused by changes spatial pattern of related to anomalies planetary wave propagation troposphere stratosphere. upward positive phase significantly weakens which may be negative buoyancy frequency Arctic. When phase, further contribute via weakening Brewer–Dobson circulation decreasing temperature P2.