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- W2123610080 abstract "Abstract We investigate the effects of atmospheric gravity waves on the vertical and horizontal structure of the ionosphere of Jupiter. The presented non-linear, two-dimensional model of the jovian ionosphere allows for spatially and temporally varying neutral wind and temperature fields and tracks the time evolution of six ionospheric species, H + , H 2 + , H 3 + , He + , HeH + , and CH 4 + . An analytical approach is used to validate the model results for linear, small-amplitude waves and to elucidate the mechanisms that leads to perturbations in the density of the main ion species, H+ and H 3 + . We demonstrate that the long-lived H+ ions are perturbed directly by wave dynamics whereas short-lived ions such as H 3 + are perturbed by chemical interactions with other perturbed ion species. The model is then applied using larger gravity wave amplitudes consistent with observations. Atmospheric gravity waves propagating at high altitudes create layers of enhanced electron density similar to the system of layers observed during the J0-ingress radio occultation of the Galileo spacecraft. Our best fit to the J0-ingress observation is achieved using an 82 min period forcing wave with horizontal and vertical wavelengths of 500 km and 60 km respectively, and peaks at 510 km above the 1 bar pressure level. We further investigate the effects of the wave-induced ion flux on the background ionospheric structure and demonstrate that in the presence of a gravity wave the background density profiles of the H+ and H 3 + ions are significantly modified. We also find that the column density of H 3 + has variations that can exceed 10% as the wave propagates." @default.
- W2123610080 created "2016-06-24" @default.
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- W2123610080 date "2011-01-01" @default.
- W2123610080 modified "2023-10-01" @default.
- W2123610080 title "Impact of atmospheric gravity waves on the jovian ionosphere" @default.
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- W2123610080 doi "https://doi.org/10.1016/j.icarus.2010.10.017" @default.
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