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Atmospheric gravity waves in Venus dayside clouds from VIRTIS-M images

Cardesín-Moinelo, Alejandro; Hueso, Ricardo; Peralta, Javier +3 more

We perform a survey of the Visible and Infrared Thermal Imaging Spectrometer-Mapper (VIRTIS-M) images onboard the Venus Express space mission, at four narrow wavelength bands that target different altitude regions on the cloud deck of Venus' atmosphere (280–320, 365–400, 580–600, 900–920 nm). Our goal was to detect and characterize atmospheric gra…

Bimodal aerosol distribution in Venus' upper haze from joint SPICAV-UV and -IR observations on Venus Express

Montmessin, F.; Fedorova, A.; Korablev, O. +3 more

Spectroscopic solar occultation measurements by the Spectroscopy for Investigation of Characteristics of the Atmosphere of Venus/Solar Occultation at Infrared instrument (SPICAV/SOIR) onboard the Venus Express orbiter gave new data about upper haze aerosol properties, its vertical distribution and spatial and temporal variations. Early study with …

Exploring sensitivity: Unveiling the impact of input parameters on Venus ionosphere V₂ layer characteristics

Choudhary, R. K.; Ambili, K. M.; Tripathi, Keshav R.

This study investigates the impact of model input parameters on the characteristic features of the dayside V₂ layer in the Venus ionosphere using an in-house developed one-dimensional photochemical model (1D-PCM) and observations from Venus Express radio science experiments (VeRa). 1D-PCM is simulated for different combinations of neutr…

H₂CO, O₃, NH₃, HCN, N₂O, NO₂, NO, and HO₂ upper limits of detection in the Venus lower-mesosphere using SOIR on board Venus Express

Aoki, S.; Vandaele, A. C.; Trompet, L. +6 more

We report on mean upper limit number densities and volume concentrations of H₂CO, O₃, NH₃, HCN, N₂O, NO₂, NO, and HO₂ at the Venus terminator above the cloud layer, computed from the SOIR/Venus Express transmittances measured during hundreds of solar occultations. An unsuccessful at…

Three-dimensional Venusian ionosphere model

Chaufray, Jean-Yves; Lefèvre, Franck; Lebonnois, Sébastien +3 more

To study the Venusian ionosphere, a 3D ionospheric model is included in the Venus Planetary Climate Model (Venus PCM), which we present here with a number of recent extensions and improvements. Our ionospheric model of Venus consists of 15 charged species (electron and 14 ions), 13 photo-ionization for 8 species, an ion-neutral chemistry (61 react…