Physics
Scientific paper
Nov 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997icar..130...49s&link_type=abstract
Icarus, Volume 130, Issue 1, pp. 49-56.
Physics
Scientific paper
Spectroscopic observations of Jupiter at thermal-infrared wavelengths were performed on November 8-9 and December 14, 1994, 16 and 21 weeks after the fragments of comet Shoemaker-Levy 9 collided with Jupiter. Residual stratospheric ammonia was searched for in emission at 930.76 cm^-1 over the longitudes corresponding to the remnants of the D/G/R/S impact sites. We believe a small amount of ammonia may have been detected in November, but report an upper limit for both dates. The constant volume mixing ratio for pressure levels less than 10 mbar that best fits the observation on November 8 is no more than 3.6 +/- 2.4 x 10^-10. This upper limit decreased to <=2.3 +/- 3.0 x 10^-10 on December 14. These values are equivalent to upper limits of 1.9 +/- 1.2 x 10^-10 on November 8 and <=1.2 +/- 1.5 x 10^-10 on December 14 if we adopt a constant volume mixing ratio above a base at 100 mbar. We also searched, without success, for stratospheric ammonia on November 9 over the K/W and L impact site remnants. Our upper limits place stronger constraints on the stratospheric ammonia lifetimes and photochemical depletion models.
Bjoraker Gordon L.
Deming Drake
Jennings Donald E.
McCabe George H.
Sada Pedro V.
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