Day-Night Monitoring of Volcanic SO2 and Ash Clouds for Aviation Avoidance at Northern Polar Latitudes. - Nickolay A. Krotkov; Vincent Realmuto; Can Li; Colin J. Seftor; Jason Li; Kelvin Brentzel; Martin Stuefer; Jay Cable; Carl Dierking; Jennifer S. Delamere; David Schneider; Johanna Tamminen; et al. (Remote. Sens., 2021)