Mapping Jupiter's Mischief

New results (Grassi et al., 2020, https://doi.org/10.1029/2019JE006206) from analysis of Juno Jovian Infrared Auroral Mapper (JIRAM) 4‐ to 5‐μm observations provide updated latitudinal abundance profiles and measurements of the spatial distribution of H2O, NH3, PH3, GeH4, and AsH3 in Jupiter's troposphere near the 3‐ to 5‐bar level. The observed compositional variations provide new constraints on processes shaping chemical abundances in the cloud‐forming region of the troposphere, including vertical and horizontal atmospheric mixing, meteorology and cloud formation, transport‐induced quenching, and photochemistry. Along with recent results from the Juno Microwave Radiometer (MWR) for NH3 and H2O abundances far below the clouds, the JIRAM measurements of key disequilibrium tracer species can also be used to explore the coupled dynamics, chemistry, and bulk composition of Jupiter's deep atmosphere. The heavy element abundance inventory on Jupiter is a key constraint for the development and assessment of giant planet formation models. Combined with prior ground‐based, spacecraft, and in situ observations, the Juno results suggest near‐uniform (∼2–4 times) enhancements over protosolar abundances for several heavy elements in Jupiter's atmosphere, giving new clues about the composition of the material accreted, the timing and location of formation, and the internal evolution of Jupiter over the history of the solar system. Plain Language Summary New results from the Juno spacecraft provide high‐resolution measurements of the distribution of several key gases in Jupiter's atmosphere and show how their abundances vary with latitude. The observed abundance distributions result from a complex tangle of chemical and physical processes, including atmospheric circulation, chemical reactions, and cloud formation that together shape the abundances of chemical species in the troposphere. Recent infrared and microwave measurements also provide key clues about the chemistry and composition of Jupiter's atmosphere below the clouds and into the deep interior. The new results from the Juno mission thus represent a major step toward completing its goal of providing an accurate elemental inventory of Jupiter's deep atmosphere and deliver new insights into Jupiter's formation and chemical evolution: What is Jupiter made of and how did it get that way? Key Points Recent Juno results provide updated latitudinal abundance profiles that map the distribution of several key atmospheri