1. Institute of Atmospheric and Climate Sciences; National Research Council of Italy; Bologna Italy
2. Environmental Chemical Processes Laboratory, Department of Chemistry; University of Crete; Iraklio Greece
3. School of Physics and Centre for Climate and Air Pollution Studies, Ryan Institute; National University of Ireland; Galway Ireland
4. National Centre for Atmospheric Science, School of Geography, Earth and Environmental Sciences; University of Birmingham; Birmingham UK
5. School of Earth, Atmospheric and Environmental Sciences; University of Manchester; Manchester UK
6. National Centre for Atmospheric Science; University of Manchester; Manchester UK