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Three-dimensional modeling of Venus photochemistry and clouds

Stolzenbach, Aurélien; Lefèvre, Franck; Määttänen, Anni +1 more

We present here three-dimensional simulations of the Venus photochemistry and clouds from the ground to the bottom of the thermosphere. For that purpose, we have implemented a state-of-the-art photochemical and equilibrium cloud model in the Venus Planetary Climate Model (Venus PCM). The interactive coupling between dynamics, radiation, chemistry …

Exploring the variability of the venusian thermosphere with the IPSL Venus GCM

Lefèvre, Franck; Lebonnois, Sébastien; Millour, Ehouarn +4 more

Recent simulations of the Institut Pierre-Simon Laplace (IPSL) Venus Global Climate Model (VGCM) developed at the Laboratoire de Météorologie Dynamique (LMD) were performed with a model top raised from ∼10^-5 (∼150 km) to ∼10^-8 Pa (180-250 km; upper boundary). The parameterizations of non-LTE CO₂ near infrared heati…

Update on SO₂, detection of OCS, CS, CS₂, and SO₃, and upper limits of H₂S and HOCl in the Venus mesosphere using SOIR on board Venus Express

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

We report on the update of SO₂ and first detections of SO₃, CS, and CS₂, and detection of OCS above the cloud deck using the SOIR instrument on-board Venus Express, and upper limit profiles of H₂S and HOCl. Based on the solar occultation spectra measured by SOIR covering all latitudes over the 2006-2014 …

The SOIR/Venus Express species concentration and temperature database: CO₂, CO, H₂O, HDO, H³⁵Cl, H³⁷Cl, HF individual and mean profiles

Vandaele, A. C.; Trompet, L.; Robert, S. +2 more

This work is an update of the SOIR mean and individual profiles of CO₂, CO, H₂O, HDO, H³⁵Cl, H³⁷Cl, HF, and the temperature measured at the Venus terminator during the Venus Express mission (2006-2014).

The previous versions of the database were published by Chamberlain et al. (2020); Mahieux et al.…

Minor species in Venus' night side troposphere as observed by VIRTIS-H/Venus Express

Robert, S.; Montmessin, F.; Bertaux, J. -L. +10 more

The 2 . 3 µm spectral window has been used to constrain the composition of the lower atmosphere (in the 30-40 km altitude range) on the night side of Venus for more than thirty years. Here, we present a follow-up study of Marcq et al. (2008), but using the full VIRTIS-H/Venus Express data archive as well as an updated radiative transfer forw…

A new constraint on HCl abundance at the cloud top of Venus

Sato, Takao M.; Sagawa, Hideo

We provided a new constraint on HCl abundance at the cloud top of Venus by infrared spectroscopy using a cross-dispersed high-resolution echelle spectrograph, iSHELL, mounted on the NASA Infrared Telescope Facility (IRTF). This study investigated the inconsistency in HCl abundance between previous ground-based observations and Venus Express solar …