Patchy Nightside Clouds on Ultra-hot Jupiters: General Circulation Model Simulations with Radiatively Active Cloud Tracers

The atmospheres of ultra-hot Jupiters have been characterized in detail through recent phase curve and low- high-resolution emission transmission spectroscopic observations. Previous numerical studies analyzed the effect localized recombination hydrogen on atmospheric dynamics heat transport Jupiters, finding that dissociation lead to a reduction day-to-night contrasts relative previous expectations. In this work, we add efforts by also considering condensation clouds their resulting circulation, radiative feedback dynamics. To do so, include radiatively active cloud tracers into existing MITgcm framework for simulating Jupiters. We take condensate properties appropriate high-temperature corundum from CARMA microphysics models. conduct suite GCM simulations with varying microphysical properties, find partial coverage is ubiquitous outcome our simulations. This patchy distribution inherently set addition equilibrium condensation, causes greenhouse warms atmosphere below deck. Nightside are further sequestered at depth due dynamically induced high-altitude thermal inversion. post-process GCMs Monte Carlo transfer code gCMCRT not significantly impact spectra but can affect phase-dependent spectra.