Tropospheric gas composition and cloud structure of the Jovian North Equatorial Belt

Details Tropospheric gas composition and cloud structure of the Jovian North Equatorial Belt Tropospheric gas composition and cloud structure of the Jovian North Equatorial Belt

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.5251c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. E3, p. 5251-5290.

Physics

62

Atmospheric Composition, Clouds, Gas Composition, Infrared Spectra, Jupiter Atmosphere, Atmospheric Models, Brightness Temperature, Equatorial Regions, Troposphere, Jupiter, Atmosphere, Troposphere, Gases, Composition, Structure, Clouds, Equatorial Region, Spacecraft Observations, Voyager Missions, Iris Instrument, Spectrometry, Brightness Temperature, Model, Spectra, Parameters, Abundance, Optical Properties, Depth, Ammonia, Particles, Opacity, Humidity, Water, Depletion, Analysis, Calculations, Methane, D

Scientific paper

Voyager IRIS observations of the NEB reveal longitudinal variability of 5-micron brightness temperatures of order 100 C. An anisotropic multiple scattering radiative transfer model is used to calculate synthetic spectra for comparison with the IRIS observations. Mie theory is used to model the spectral dependence of cloud extinction from 180 to 2300/cm. Cloud base locations within the model vary with assumed gas abundances according to thermochemical equilibrium. It is found that spatial variations in the abundance profiles of the condensible species, parahydrogen profiles and cloud optical depths can be used as tracers of the local and large-scale dynamics. The variation of cloud opacity is strongly correlated with the variation of relative humidity, which suggests that dynamic depletion of water vapor above the cloud forming level is the most plausible model to explain the spatial variation in the water profile within the NEB.

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