The measured ozone profile is often not a smooth curve with a maximum in the stratosphere. It exhibits narrow layers of enhanced ozone concentration (positive laminae) and of depleted ozone (negative laminae). Here we deal with the trends in ozone laminae characteristics. All sufficiently long data series of ozonesonde soundings from the Northern Hemisphere poleward of 30°N are analyzed separately for Europe, northern America, Japan, and the Arctic. The trends in ozone laminae are quite strong, much stron…
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