Ozone trends at northern mid- and high latitudes

The paper "Ozone trends at northern mid- and high latitudes – a European perspective" by Harris et al., has been recently published in Annales Geophysicae. This interesting paper shows the main conclusions of the EU CANDIDOZ project which investigated the chemical and dynamical influences on decadal ozone trends focusing on the Northern Hemisphere. The results shows an almost monotonic negative trend from the late 1970s to the mid 1990s followed by an increase in the NH mid latitudes and in the Arctic. The article analyzes the chemical and dynamical causes of this ozone increase.