# # Program information file # PROGRAM_ID 2021A028 PROGRAM_TITLE Studying Io's Seasonal Atmosphere and Investigating Volcanic Emissions PROGRAM_INV1 Constantine Tsang PROGRAM_INV2 John Spencer PROGRAM_INV3 PROGRAM_INV4 PROGRAM_INV5 PROGRAM_SCICAT solar system PROGRAM_ABSTRACT_BEG Io's atmosphere is dominated by SO2, which has strong bands in the mid-IR. We will continue our long-term campaign of measuring the global, spatially inhomogeneous atmosphere at 19 um using TEXES to determine the mechanisms of support. The previous Jupiter year shows an apparent seasonal response of Io's atmosphere to orbital eccentricity, where observations from a second Jupiter year will confirm or refute. In addition, we will focus more on the sub-Jupiter hemisphere to increase coverage at those longitudes as well as investigate correlations of volcanic SO2 and Na. PROGRAM_ABSTRACT_END