9:30 AM - 9:45 AM
[PPS11-15] A New Microphysical Model for Exoplanetary Clouds: Testing against the Observations of Terrestrial and Jovian Clouds.
We have been developed a new exoplanetary cloud model that involves the microphysics of condensation and coalescence (the Meeting of The Japanese Society for Planetary Sciences 2015). Our model produces the vertical distributions of the number and mass densities of cloud particles as a function of the atmospheric updraft velocity, the mixing ratio of the condensing gas at the cloud deck, and the number density of cloud condensation nuclei (CCN).
Here, we test the validity of our model by comparing with the observations of the clouds on the Earth and Jupiter. For terrestrial water clouds, we find that our model plausibly reproduces the cloud optical depth from satellite observations and vertical distributions of the mass and number densities of cloud particles from in situ observations. For Jovian ammonia clouds, our model simultaneously reproduces the particle effective radius, cloud optical depth, and cloud geometric thickness from far-infrared observations by assuming the updraft velocity of 1.2—2 m/s and CCN number density of ~5×104 m-3. The parameters values assumed for the Jovian clouds are consistent with the Galileo probe observation and with previous 2D simulations of moist convection in the Jovian atmosphere.