AR 14585 (Archival Research)

Sun Jul 14 04:44:55 GMT 2024

Principal Investigator: Amy Simon
PI Institution: NASA Goddard Space Flight Center
Investigators (xml)

Title: Understanding Jupiter's Cloud Scale and Energy Spectra from Archival Data
Cycle: 24

We propose an archival study of Hubble Jupiter data acquired from 1994 to 2016. We focus on datasets where at least one full rotation (360 deg coverage) is available in WFPC2 or WFC3. In the past, Jupiter global maps have been used to measure winds, and to identify large-scale structure evolution and atmospheric waves. However, global maps can also be used to investigate the spatial structure spectrum of passive tracers (size scales of cloud features). The kinetic energy spectrum can also be investigated when successive maps of Jupiter are produced on back-to-back rotations where the zonal and meridional winds can be measured, and such data were acquired in 2015 and 2016 from the OPAL program (GO13937/14334). The spectra of passive tracers and kinetic energy have spectral slopes dependent on the turbulent state of the atmosphere's dimensionality, coupling the observed cloud deck dynamics with much deeper regions. We will use maps in a variety of filters and acquired over 20 years to investigate Jupiter's turbulence spectra and how it varies with wavelength (and presumably altitude) and over time. This is directly tied to variations in the tropospheric weather layer and the transport of energy in the atmosphere, important for understanding circulation in unresolved exoplanet atmospheres.