1. School of Geography, Earth and Environment Sciences, University of Birmingham, Birmingham B15 2TT, U.K.
2. Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia 3, Sesto Fiorentino 50019, Italy
3. National Research Council of Italy, Institute of Polar Sciences (CNR-ISP), Via Torino 155, Venice-Mestre 30172, Italy
4. National Centre for Atmospheric Science (NCAS), School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, U.K.
5. Centre for Geography and Environmental Science, University of Exeter, Penryn TR10 9FE, U.K.
6. State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
7. Institute of Marine Science, Consejo Superior de Investigaciones Científicas (CSIC), Barcelona 08003, Spain
8. Centre for Environmental and Agricultural Informatics, School of Water, Energy & Environment, Cranfield University, College Road, Cranfield MK43 0AL, U.K.
9. Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
10. Department of Atmospheric Sciences, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China
11. British Antarctic Survey, Natural Environment Research Council, Cambridge CB3 0ET, U.K.
12. National Research Council of Italy, Institute of Polar Sciences (CNR-ISP), Via P. Gobetti 101, 40129 Bologna, Italy