# # Program information file # PROGRAM_ID 2021B089 PROGRAM_TITLE Near-Infrared Characterization of Evolving Atmospheric Processes in Jupiter during Juno Perijoves 36-39 PROGRAM_INV1 Glenn Orton PROGRAM_INV2 Thomas Momary PROGRAM_INV3 Emma Dahl PROGRAM_INV4 Kevin Baines PROGRAM_INV5 Xi Zhang PROGRAM_SCICAT solar system PROGRAM_ABSTRACT_BEG We propose near-infrared imaging and spectroscopy of Jupiter using SpeX to measure the ongoing evolution of the aerosol properties concomitantly with Juno spacecraft measurements to constrain the processes controlling atmospheric phenomena. These observations will extend and enhance Juno observations by providing a spatial context for Juno instruments' limited field of view as well as the temporal context that ties together Juno's measurements that are separated by 43-44 days during this portion of its extended mission. We will address three specific questions. [1] What are the processes that modulate and transport Jupiter's prominent polar hazes? We will verify an apparent decrease of the North Polar Region opacity observed by Juno's visible camera. If it is present, does it correspond with changes in the solar wind or in Jupiter's magnetosphere? Do inhomogenities in either polar region correlate with the location and variability of auroral activity? [2] What is the relationship between color and cloud altitude? We will test a model in which high-altitude particles are UV-irradiated, causing changes in cloud colors. We will examine the correlation between the ongoing darkening of Jupiter's Equatorial Zone and the altitude of its upper-tropospheric haze particles. We will also examine changes in the upper-atmospheric haze associated with the giant anticyclone Oval BA during ongoing changes of its visible color. [3] What is the particulate structure associated with strong perturbations of the morphology of the Great Red Spot [GRS]? We will create 3D maps of clouds and hazes in and around the GRS that can discriminate between various dynamical models for perturbations by smaller vortices that are expected during this time period. Together, the proposed observations will provide a critical component of a campaign of Earth-based support for Juno [see https://www.missionjuno.swri.edu/planned-observations]. PROGRAM_ABSTRACT_END