Vertical distribution of H3+ at mid-to-low latitudes in the Jupiteratmosphere with Juno/JIRAM

The NASA Juno spacecraft is studying Jupiter's atmosphere in depth since August 2016. The Jupiter InfraredAuroral Mapper (JIRAM) experiment, one of the scientific instruments on board Juno, is composed of a twobroad-band imager and an infrared spectrometer, dedicated to the auroral and chemical composition of theJupiter's atmosphere. In particular, JIRAM spectrometer has made observations of the trihydrogen cation (H3+)emissions at auroal region latitudes (Adriani et al. 2017; Dinelli et al. 2017) and at mid-to-equatorial latitudes(Migliorini et al., submitted) across the Jupiter's planetary disc in the spectral band 2-5?m. We focus on limbobservations of the planet from 60oNorth to 60oSouth latitudes, to investigate the vertical distribution of the H3+emissions as a function of latitude across Jupiter's dayside. H3+ volume mixing ratio (VMR) and atmospherictemperatures were retrieved from the H3+ emission features in the 3-4?m spectral band, while H3+ concentrationwas derived by combining the previous quantities. Here we discuss results obtained from data acquired duringthe first and fifth Juno orbit around Jupiter, in August 2016 and February 2017 respectively. Differences betweenNorth and South hemispheres are also discussed.