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28 March 2024
 
  » arxiv » astro-ph/0512068

 Article overview


Meridional Transport in the Stratosphere of Jupiter
Mao-Chang Liang ; Run-Lie Shia ; Anthony Y.-T. Lee ; Mark Allen ; A. James Friedson ; Yuk L. Yung ;
Date 2 Dec 2005
Journal Astrophys.J. 635 (2005) L177-L180
AbstractThe Cassini measurements of C$_2$H$_2$ and C$_2$H$_6$ at $sim$5 mbar provide a constraint on meridional transport in the stratosphere of Jupiter. We performed a two-dimensional photochemical calculation coupled with mass transport due to vertical and meridional mixing. The modeled profile of C$_2$H$_2$ at latitudes less than 70$^circ$ follows the latitude dependence of the solar insolation, while that of C$_2$H$_6$ shows little latitude dependence, consistent with the measurements. In general, our model study suggests that the meridional transport timescale above 5-10 mbar altitude level is $gtrsim$1000 years and the time could be as short as 10 years below 10 mbar level, in order to fit the Cassini measurements. The derived meridional transport timescale above the 5 mbar level is a hundred times longer than that obtained from the spreading of gas-phase molecules deposited after the impact of Shoemaker-Levy 9 comet. There is no explanation at this time for this discrepancy.
Source arXiv, astro-ph/0512068
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