The seasonal cycle of the wintertime stratospheric ozone mixing ratio in northern hemispheric polar region and its relationship with stratospheric temperature variability
Maximum variability of ozone mixing ratio is found at ~10-20 hPa, which is converted into maximum variability of ozone concentration at ~20-30 hPa. The cooling of the stratosphere in early winter removes ozone molecules through the nucleation process resulting in a negative maximum ozone mixing ratio anomalies at ~10 hPa in late December. The ensuing warming slows the nucleation process resulting in a positive maximum ozone mixing ratio anomalies at ~7 hPa in late April. Correlation between the ozone mixing ratio anomalies and the stratospheric temperature anomalies in the 7-50 hPa layer is typically over 0.8 in the polar region to the north of ~60°N, well establishing the temperature-ozone relationship in the stratosphere of the northern hemispheric polar region. In the lower stratosphere below 100 hPa, however, potential vorticity appears to impact the ozone concentration significantly.