Variability of phosphine on Jupiter from 5-μm spectroscopy |
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| Authors: | Pierre Drossart Thérèse Encrenaz Alan T Tokunaga |
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| Institution: | Observatoire de Meudon, 92190 Meudon, France;University of Hawaii, Honolulu, Hawaii 96822, USA |
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| Abstract: | Spectra of Jupiter recorded in the 1900- to 2300-cm?1 range at the IRTF in Hawaii, July 1982, provide tentative evidence for variability of the Jovian atmosphere between zones and belts. It is concluded from analysis of the ν1and ν3 bands of PH3 that there is a possible enhancement of the PH3/H2 ratio in the belts when compared to the zones. There is an apparent reduction of the PH3 abundance between the IRIS Voyager 1 determinations and these spectra, implying temporal or spatial variability of PH3 on Jupiter. Interpretation of this variability in the troposphere could involve both dynamical and thermochemical processes. |
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