Publication Abstracts

West et al. 1981

West, R.A., C.W. Hord, K.E. Simmons, D.L. Coffeen, M. Sato, and A.L. Lane, 1981: Near-ultraviolet scattering properties of Jupiter. J. Geophys. Res., 86, 8783-8792, doi:10.1029/JA086iA10p08783.

The Voyager 2 photopolarimeter experiment obtained photometric observations of Jupiter at four phase angles between 20° and 80° and at various illumination angles from limb to terminator. These data were analyzed to determine the altitude distribution and scattering properties of the material responsible for Jupiter's low geometric albedo at 2400 Å. In polar regions the absorber must be higher than 40 mbar. In mid-latitudes, center-to-limb measurements indicate that most of the absorbing material lies deeper than 100 mbar. Absolute reflectivity requires a considerable amount above 400 mbar. The maximum amount of solar UV flux below 2550 Å available for heating the stratosphere at 20° latititude is only 10-4 of the solar constant at Jupiter. The latitudinal distribution of stratospheric absorbers suggests that energy deposition from the magnetosphere is important in their formation. We examine the scattering properties of model atmospheres containing three distinct aerosol size distributions. Rayleigh's phase function fits our data at several phase angles better than any particle phase function. We derive an upper limit to the column abundance of particles larger than 0.05-µm radius in the north tropical zone and north equatorial belt. These regions contain less than one extinction optical depth at 2400 Å of such particles above the 100-mbar altitude. Rayleigh scattering from the top 100 mbar obscures effects due to scattering from the deeper absorbing particles over our range of phase angles. We are unable to determine whether the absorbers are particulates or molecular.

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BibTeX Citation

  author={West, R. A. and Hord, C. W. and Simmons, K. E. and Coffeen, D. L. and Sato, M. and Lane, A. L.},
  title={Near-ultraviolet scattering properties of Jupiter},
  journal={Journal of Geophysical Research},

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RIS Citation

ID  - we02000x
AU  - West, R. A.
AU  - Hord, C. W.
AU  - Simmons, K. E.
AU  - Coffeen, D. L.
AU  - Sato, M.
AU  - Lane, A. L.
PY  - 1981
TI  - Near-ultraviolet scattering properties of Jupiter
JA  - J. Geophys. Res.
JO  - Journal of Geophysical Research
VL  - 86
SP  - 8783
EP  - 8792
DO  - 10.1029/JA086iA10p08783
ER  -

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