H2 spectroscopy and a diurnally changing cloud on Jupiter

Details H2 spectroscopy and a diurnally changing cloud on Jupiter H2 spectroscopy and a diurnally changing cloud on Jupiter

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988icar...75..324c&link_type=abstract

Icarus (ISSN 0019-1035), vol. 75, Aug. 1988, p. 324-350.

Physics

Optics

11

Cloud Physics, Diurnal Variations, Hydrogen, Jupiter (Planet), Planetary Atmospheres, Planetary Radiation, Cassegrain Optics, Charge Coupled Devices, Convection Clouds, High Resolution, Radiative Transfer, Solar Heating, Spectral Line Width, Thermodynamic Equilibrium

Scientific paper

Spectroscopic observations of H2 in specific longitude regions of Jupiter as they rotate from limb to limb are reported. Data obtained in the 3-0 S(0) and S(1) lines using a CCD detector and a spectrograph with either echelle or plane gratings at the Cassegrain focus of the 24-inch telescope at Whipple Observatory during April-June 1983 are presented in extensive tables and graphs and analyzed in detail, modeling spatial and temporal variations at seven latitudes. An east-to-west increase in the equivalent line widths is attributed to the combined action of internal and solar heating of a convective layer, resulting in diurnal changes in the vertical cloud structure. It is inferred that the hydrogen observed is mainly in an equilibrium thermodynamic state, with small amounts of nonequilibrium hydrogen at high altitudes.

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