THE STRUCTURE OF THE STRATOSPHERIC AEROSOL LAYER IN THE EQUATORIAL AND SOUTH POLAR-REGIONS OF JUPITER

Authors
Citation
F. Moreno, THE STRUCTURE OF THE STRATOSPHERIC AEROSOL LAYER IN THE EQUATORIAL AND SOUTH POLAR-REGIONS OF JUPITER, Icarus, 124(2), 1996, pp. 632-644
Citations number
31
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Astronomy & Astrophysics
Journal title
IcarusACNP
ISSN journal
0019-1035
Volume
124
Issue
2
Year of publication
1996
Pages
632 - 644
Database
ISI
SICI code
0019-1035(1996)124:2<632:TSOTSA>2.0.ZU;2-C
Abstract
A one-dimensional code to study the microphysical processes affecting aerosol particles in the jovian stratosphere and upper troposphere has been developed, The algorithms are based on those developed by Turco et al.(Turco, R. P., P. Hamill, O. B. Toon, R. C. Whitten, and C. S. K iang 1979. J. Atmos. Sci. 36, 699-717) and include the effects of part icle sedimentation, coagulation, eddy diffusion, and growth by heterom olecular condensation. A set of Hubble Space Telescope images in the n ear-UV was used to retrieve the aerosol distribution in the equatorial and south polar regions of Jupiter. The results obtained are consiste nt with the picture in which in the polar regions the aerosols are for med from auroral-related phenomena, while in the equatorial region the largest component of the aerosols would be those particles formed aft er condensation of hydrazine onto condensation nuclei. Concerning the charge of the particles, the particles in the south polar region must be considerably more charged than at equatorial latitudes. The model s olutions give particles smaller than about 0.05 mu m in radius at the equator, and 0.07 mu m at the polar regions, with total optical depths of 0.3 and 1.3 at the equator and the south polar region, respectivel y, at 410 nm wavelength. The differences in the derived imaginary refr active indices reflect a compositional change in the aerosols at low a nd high latitudes. (C) 1996 Academic Press, Inc.