  Jupiter's atmosphere is dominated by multiple jet streams which are strongly
tied to its 3D atmospheric circulation. Lacking a rigid bottom boundary,
several models exist for how the meridional circulation extends into the
planetary interior. Here we show, collecting evidence from multiple instruments
of the Juno mission, the existence of mid-latitudinal meridional circulation
cells which are driven by turbulence, similar to the Ferrel cells on Earth.
Different than Earth, which contains only one such cell in each hemisphere, the
larger, faster rotating Jupiter can incorporate multiple cells. The cells form
regions of upwelling and downwelling, which we show are clearly evident in
Juno's microwave data between latitude 60S and 60N. The existence of these
cells is confirmed by reproducing the ammonia observations using a simplistic
model. This study solves a long-standing puzzle regarding the nature of
Jupiter's sub-cloud dynamics and provides evidence for 8 cells in each Jovian
hemisphere.
