Detecting volcanic sulfur dioxide plumes in the Northern Hemisphere using the Brewer spectrophotometers, other networks, and satellite observations - Zerefos, C. S.; Eleftheratos, K.; Kapsomenakis, J.; Solomos, S.; Inness, A.; Balis, D. S.; Redondas, A.; Eskes, H.; Allaart, M.; V. Amiridis; Dahlback, A.; De Bock, V.; et al. (Atmospheric Chemistry and Physics, 2017)