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Thermal tides on Pluto |
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| Authors: | Anthony D Toigo Peter J Gierasch Emmanuel Lellouch |
| Institution: | a Center for Radiophysics and Space Research, Cornell University, Ithaca, NY 14853-6801, United States b Astronomy Department, Cornell University, Ithaca, NY 14853-6801, United States c LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France |
| Abstract: | Stellar occultations have shown that vertical profiles of density fluctuations in the atmosphere of Pluto typically show wave-like structure with an amplitude of a few percent and vertical wavelengths of a few kilometers. Here we calculate the tidal response of Pluto’s atmosphere to solar-induced sublimation “breathing” from N2 frost patches. Solutions show global-scale wave-like density structure capable of explaining the observations. The atmospheric response is a combination of eastward and westward migrating tides, together with a zonally symmetric mode. Calculated vertical wavelengths and amplitudes are similar to observations. |
| Keywords: | Pluto Atmosphere Tides Atmospheric Occultations Pluto Atmospheres Structure |
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