  We obtained the first maps of Jupiter at 1-3 mm wavelength with the Atacama
Large Millimeter/Submillimeter Array (ALMA) on 3-5 January 2017, just days
after an energetic eruption at 16.5S jovigraphic latitude had been reported by
the amateur community, and about 2-3 months after the detection of similarly
energetic eruptions in the northern hemisphere, at 22.2-23.0N. Our
observations, probing below the ammonia cloud deck, show that the erupting
plumes in the SEB bring up ammonia gas from the deep atmosphere. While models
of plume eruptions that are triggered at the water condensation level explain
data taken at uv-visible and mid-infrared wavelengths, our ALMA observations
provide a crucial, hitherto missing, link in the moist convection theory by
showing that ammonia gas from the deep atmosphere is indeed brought up in these
plumes. Contemporaneous HST data show that the plumes reach altitudes as high
as the tropopause. We suggest that the plumes at 22.2-23.0N also rise up well
above the ammonia cloud deck, and that descending air may dry the neighboring
belts even more than in quiescent times, which would explain our observations
in the north.
