1. Rotational Light Curves of Jupiter
We investigated multi-wavelength rotational light curves (emission and reflection curves) of Jupiter for the first time. Our result shows that the disk averaged emission at 5 Micron has a ~20% percent variation, which is consistent with the previous research. On the other hand, the rotational light curves of the other wavelengths only possess a few percent variations. We suggest that the large variation at 5 Micron is caused by the probing of cloud holes (e.g., looking into different atmosphere layers) which possess a large temperature difference compared with cloudy regions. Those cloud holes are associated with a train of Rossby waves. At the other wavelengths, the Great Red Spot, vortices, and temperature variations in the same pressure layer lead to an a-few-percent rotational variation. This research provides several insights and implications for unveiling the mechanism behind the rotational variations of cold brown dwarfs and directly imaged exoplanets.
2. A Nonhydrostatic General Circulation Model
for Studying Planetary Atmospheres
Held-Suarez Test from Day 0 to Day 900
Recent and past observations on solar system and extra-solar planets raise questions about the jet formation and tracer distribution in their atmospheres. To shed the light on these phenomena, we developed a Vertically Implicit Correction (VIC) scheme for a cloud resolving model Simulating Nonhydrostatic Planetary Atmospheres (SNAP) to simulate the atmospheric dynamics in the global scale. The VIC scheme can improve the computational efficiency by up to two orders of magnitude. We validated our new VIC scheme by a hierarchy of benchmark tests ranging from localized bubble tests to global simulations such as Held-Suarez test. The simulation results of the VIC scheme show the consistency with previous ones.
NH3 Cloud and NH3 Vapor Distribution in a 2D Jupiter Cloud-Resolving Simulation
We are currently working on implementing the VIC scheme into the cloud-resolving model and also a microphysics scheme with self-consistent chemistry reaction of NH3 and H2S for icy giants [Drawing credits to Xiaoshan Huang].