Sensitivity Tests of a Two-Cloud Model of the Jovian Atmosphere

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

A two-cloud model of the vertical structure of Jupiter's atmosphere is used to interpret center-to-limb variations of the disk reflectivity at several latitudes. The data set consists of narrow-band images taken with the 0.6 m Tortugas Mountain Observatory telescope at New Mexico State University and the Wide Field/Planetary Camera 2 on the Hubble Space Telescope. The model assumes an atmosphere consisting of two cloud decks, an overlying haze layer, and intervening layers of clear gas. It uses a doubling/adding routine that includes the effects of multiple scattering and incorporates a gradient search of the parameter space using a linearization of the fitting function. We explore the sensitivity of the model to each of the free parameters: the optical depths of the haze, the upper cloud, the gas above the haze, and the gas between the haze and the ammonia cloud deck, and the single scattering albedos of the two cloud decks. The model is most sensitive to variations in the optical depth of the upper cloud, the implications of which are discussed. These sensitivity tests are used to determine the extent to which such a model can be applied to interpret vertical structure information in the jovian atmosphere using ground-based and space-based visible wavelength images.

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