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The contribution of atmospheric aerosols to the Martian opposition effect*

Published online by Cambridge University Press:  14 August 2015

Jaylee M. Mead
Jaylee M. Mead*
Affiliation:
Laboratory for Space Physics, NASA Goddard Space Flight Center, Greenbelt, Md., U.S.A.

Abstract

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Mie scattering calculations have been made for atmospheric aerosols having various indices of refraction to determine their possible contribution to a Martian opposition effect, such as that reported by O'Leary in 1967. Neither substances with a real index between 1.20 and 1.50, such as ice, water, or solid CO2, nor highly absorbing materials, such as limonite, can produce the observed effect. Submicron-sized spherical particles with refractive indices of 1.55 to 2.00 do, on the other hand, exhibit a marked increase in reflectivity at small phase angles and might be responsible for the enhanced brightness at the shorter wavelengths.

Type
Part II: Mars
Information
Symposium - International Astronomical Union , Volume 40: Planetary Atmospheres , 1971 , pp. 166 - 169
Copyright
Copyright © Reidel 1971 

References

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