Probabilistic retrieval of volcanic SO2 altitude and loading using the Cross-track Infrared Sounder (CrIS): Examples from Raikoke, Sierra Negra, Bogoslof, and Anak Krakatau

David Matthew Hyman, Cooperative Institute for Meteorological Satellite Studies, Madison, WI, United States and Michael Pavolonis Sr., NOAA/NESDIS, Madison, United States