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With JWST slated to gain high fidelity time dependent data on brown dwarfatmospheres, it is highly anticipated to do the same for directly imaged,sub-Jupiter exoplanets. With this new capability, the need for a full 3Dunderstanding to explain spectral features and their time dependence isbecoming an vital aspect for consideration. To examine the atmosphericproperties of directly imaged sub-Jupiter exoplanets, we use the threedimensional Exo-FMS general circulation model (GCM) to simulate a metalenhanced generic young sub-Jupiter object. We couple Exo-FMS to a kineticchemistry scheme, a tracer based cloud formation scheme and a spectralradiative-transfer model to take into account the chemical and cloud feedbackon the atmospheric thermochemical and dynamical properties. Our results show ahighly complex feedback between clouds and chemistry onto the 3D temperaturestructure of the atmosphere, bringing about latitudinal differences andinducing time-dependent stormy features at photospheric pressures. Thissuggests a strong connection and feedback between the spatial cloud coverageand chemical composition of the atmosphere, with the temperature changes anddynamical motions induced by cloud opacity feedback driving chemical speciesbehaviour. In addition, we also produce latitude dependent and time dependentspectra of our model to investigate atmospheric variability and periodicity incommonly used photometric bands. Overall, our efforts put the included physicsin 3D simulations of exoplanets on par with contemporary 1Dradiative-convective equilibrium modelling.

Dynamically coupled kinetic chemistry in brown dwarf atmospheres -- II. Cloud and chemistry connections in directly imaged sub-Jupiter exoplanets