A Study of the Stratospheric Aerosols on Jupiter Using Hubble Space Telescope Data

Details A Study of the Stratospheric Aerosols on Jupiter Using Hubble Space Telescope Data A Study of the Stratospheric Aerosols on Jupiter Using Hubble Space Telescope Data

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p13a1649f&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #P13A-1649

Other

[0305] Atmospheric Composition And Structure / Aerosols And Particles, [0343] Atmospheric Composition And Structure / Planetary Atmospheres

Scientific paper

We present a study of the stratospheric aerosols in Jupiter's atmosphere using Hubble Space Telescope Data taken in September 1997 with the Wide Field Planetary Camera 2. It was during this time that Jupiter's Great Dark Spot was observed and we present some results concerning the Great Dark Spot. Jupiter's Great Dark Spot was roughly twice the size of Earth and was located in the north pole. The phenomenon lasted only a few weeks, and was observed first in 1977, and then again in 2000 by NASA's Cassini flyby of Jupiter. The composition of the spot is uncertain; is it made of aerosols or something else? We also will give a comparative study of the aerosols in the north and south poles. The Hubble Data used was at wavelength filters of 218, 255, 336, 410, 673, 890, and 953 nanometers. It was found that a ratio plot of 410nm data divided by the 218nm data gave very clear structural features of the Dark Spot and other aerosol regions. Data analysis was performed on these different regions and the results were compared. The Data analysis consisted of creating spectral plots of the average intensity versus wavelength for the different regions. Our results show that as you move poleward, the aerosol concentration increases. Also, there are differences between the concentration and composition of the aerosols in the north and south poles. The aerosols in the south pole are thicker than the aerosols in the north pole. We also found that the aerosols in the north showed little variation in composition and concentration with respect to changes in longitude, whereas the aerosols in the south pole are more concentrated at a System III Central Meridian Longitude value of zero. The analysis of the Great Dark Spot showed that the Dark Spot is darker (more absorptive) in the ultra violet 218 to 336 nm and is slightly brighter at 890nm (methane abortion band) than any other regions in the north pole. This would suggest that the Dark Spot is made of aerosols and contains more aerosol than the surrounding regions or that at the spot the methane is in emission. The project is supported by NASA award NNX10AE72G,NSF award ATM-0851932 and the American Recovery and Reinvestment Act of 2009 (ARRA)and NASA CIPAIR 2011.

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