Fig. 5: Contributions from hemispheric transport, non-European neighboring Countries, and maritime Sources to MDA8 O3 concentrations in the 35 studied European countries.
From: National and transboundary contributions to surface ozone concentration across European countries

The mean contributions of a BCON (hemispheric transport), b SEA (maritime sources), and c NOEU35 (non-European neighboring countries) to MDA8 O3 concentrations are presented in µg/m3 (top panel) and percentage (bottom panel) for the summers of 2015, 2016, and 2017. Note that each plot uses a different scale.