Figure 1

Comparison of forcing ozone and observed ozone. (a) Correlation coefficients between stratospheric ozone variations in the WACCM4 model input data and in SWOOSH for the period 1979–2005. Input data is the standard CESM ozone forcing used in WACCM4. (b) Variations in stratospheric ozone averaged over the region 60–90°N and 150–50 hPa from WACCM4 model input data (blue line) and (c) over the region 60–90°S and 200–100 hPa from SWOOSH (red line). (d–f) Same as (a–c), but for stratospheric ozone from WACCM4 model input data (blue line) and GOZCARDS (red line). (g–i) Same as (a–c), but for stratospheric ozone from MERRA2 (blue line) and SWOOSH (red line). (j–l) Same as (a–c), but for stratospheric ozone from MERRA2 (blue line) and from GOZCARDS (red line).