[P-PS01] Outer Solar System Exploration Today, and Tomorrow

[PPS01-P06] Inhibition of moist convection in the atmospheres of Jovian planets: the case of NH4SH formation by chemical reaction of NH3 and H2S

*Ko-ichiro SUGIYAMA¹, Kensuke Nakajima², Kiyoshi Kuramoto³, Yoshi-Yuki Hayashi⁴ (1.National Institute of Technology, Matsue College, 2.Kyushu University, 3.Hokkaido University, 4.Kobe University)

Keywords:atmosphere of Jovian planet, cloud convection, numerical calculation

In the atmospheres of Jovian planets, condensation of heavy components, such as H2O, NH3, CH4, is thought to suppress vertical convection (Guillot, 1995). In addition to these clouds resulting from condensation of the above components, the formation of NH4SH by chemical reaction of NH3 and H2S is predicted as the important cloud formation processes. Because the chemical process consumes the components heavier than the lighter major components as condensation process does, it can be anticipated that the formation of NH4SH can also suppress convection. However, the degree of possible suppression, or whether it can inhibit convection, have not investigated yet.

Here we investigate the criterion of convection inhibition associated with the formation of NH4SH in thermochemical equilibrium framework. With the convection inhibition criteria obtained in the investigation, we also examine the structure of convection in parameters where convection inhibition by NH4SH formation is thought to emerge using cloud convection model (Sugiyama et al 2009; 2011; 2014).