# # Program information file # PROGRAM_ID 2022A035 PROGRAM_TITLE Mid-Infrared Characterization of Evolving Atmospheric Processes in Jupiter During Juno Perijoves 41-43 and Potential JWST Observations PROGRAM_INV1 Glenn Orton PROGRAM_INV2 Joseph Hora PROGRAM_INV3 James Sinclair PROGRAM_INV4 Arrate Antunano PROGRAM_INV5 Leigh Fletcher PROGRAM_SCICAT major planets / satellites PROGRAM_ABSTRACT_BEG We propose shared-risk MIRSI observations of Jupiter's atmosphere that are contemporaneous with close approaches ['perijoves'] of the Juno spacecraft to Jupiter on orbits 41, 42 and 43 and potentially contemporaneous observations by JWST Cycle-1 programs. These observations cover a spectral range missing from Juno's instrument complement, providing valuable boundary conditions on temperature and composition in the upper troposphere and stratosphere that are not sensed by the instruments on board the spacecraft. They will allow us to evaluate the relationship between the dynamics of the atmosphere below the clouds that sensed by Juno's deep-sensing Microwave Radiometer [MWR] and the upper atmosphere. There are several specific science goals for this semester. They include examining the detailed structure of Ferrel cells in Jupiter's northern hemisphere jointly with the MWR. We will examine changes in atmospheric structure in the Equatorial Zone that could be the lingering aftermath of a short-lived disturbance that has left an anomalously colored overlying haze. The dynamics of the Great Red Spot will be examined, particularly in circumstances in which it is being perturbed by smaller anticyclones, as was the case in May of 2019. We will characterize differences in temperatures in the opposite poles and examine long-term trends in auroral heating of the stratosphere. Finally, we will examine the state of the atmosphere in the context of multi-decadal studies of the variability of zonal-mean properties, including seasonal and non-seasonal variability. Understanding these could have implications for variability observed in gaseous exoplanets and brown dwarfs. PROGRAM_ABSTRACT_END