Ozone lamina characteristics from ozone vertical profile measurements

Positive (negative) ozone laminae are narrow layers of enhanced (depressed) ozone concentration. In this poster we deal with positive ozone lamina characteristics at the ozonosonde stations with sufficient long period of observations in Europe, Japan, Canada and polar latitudes of both hemispheres. We divided laminae into two groups: small with size between 10 and 30 nbar and large with size above 40 nbar. In these groups we search for the following ozone lamina characteristics: depth of laminae, the height position of maximum in laminae annual cycle of lamina occurrence, the number of laminae per profile. Large ozone laminae occurrence increases with increasing latitude, the number of laminae is higher at the northern Hemisphere due to more disturbed polar vortex. The preference height interval for lamina formation is the lower stratosphere up to 18 km.