Search Publications
Wind Speed Variations at the Venus Cloud Top above Aphrodite Terra According to Long-term UV Observations by VMC/VENUS Express and UVI/AKATSUKI
Ignatiev, N. I.; Zasova, L. V.; Titov, D. V. +4 more
Series of consecutive UV (365 nm) images of Venus cloud coverage provide a way to investigate dynamics of the mesosphere. An unprecedented series of such images was obtained by the VMC/Venus Express (ESA) and UVI/Akatsuki (JAXA) cameras from 2006 to 2022. At 10°S long-term variations in the mean zonal and meridional wind speed are observed with a …
Spatial and Genetic Relationships of Groove Belts, Rift Zones, and Lobate Plains on Venus
Guseva, E. N.
Relationships of two types of extensional zones formed on the surface of Venus in different periods of geologic history—older groove belts and younger rift zones—have been analyzed. Rift zones are less abundant by area than groove belts on the surface of Venus. They are systematically more extensive than groove belts and characterized by contrast …
Numerical simulations of the global circulation of the atmosphere of Venus: Effects of surface relief and solar radiation heating
Rodin, A. V.; Mingalev, I. V.; Orlov, K. G.
The results of numerical simulations of the global circulation of the atmosphere of Venus in the framework of the complete set of gas dynamics equations, taking into account surface relief, are presented. To calculate the radiative heating/cooling of the atmosphere, the relaxation approximation is used. The heating parameters, at which the modeled…
Monte Carlo study of interaction between solar wind plasma and Venusian upper atmosphere
Barabash, S.; Stenberg, G.; Shematovich, V. I. +1 more
Isolated events of proton and alpha particle precipitation in the Venusian atmosphere were recorded with the use of the ASPERA-4 analyzer on board the ESA Venus Express spacecraft. Using a Monte Carlo simulation method for calculation of proton and alpha particle precipitations in the Venusian atmosphere, reflected and upward directed particle flu…
The estimate of the Venus magnetotail length
Popov, V. Yu.; Zelenyi, L. M.; Vasko, I. Yu.
We consider the process of flux tubes straightening in the Venus magnetotail on the basis of MHD model. We estimate the distance x t, where flux tubes are fully straightened due to the magnetic tension and the magnetotail with the characteristic geometry of field lines ("slingshot" geometry) ends. We investigate the influence of the tra…
Large-scale quasi-two-dimensional turbulence and a inverse spectral flux of energy in the atmosphere of Venus
Izakov, M. N.
The comparison of the theoretical inferences and the experimental data on large-scale turbulence in the atmospheres of the Earth and Venus, including those acquired with the Venus Express spacecraft, allows us to conclude that there is a inverse spectral flux of energy in the atmosphere of Venus, as in the terrestrial atmosphere, which participate…
On the small-scale turbulence parameters in the atmosphere of venus and their use in the global circulation models
Izakov, M. N.
Vertical profiles of the turbulence parameters calculated for the planet-averaged conditions from the experimental data on the turbulent fluctuations of temperature and wind velocity are presented. Improved formulas accounting for the difference between the atmospheric gas on Venus and an ideal one, and the large difference in its thermal capacity…
Dissipation of buoyancy waves and turbulence in the atmosphere of venus
Izakov, M. N.
The turbulent energy dissipation rate and the coefficients of turbulent diffusion and viscosity caused by breaking buoyancy waves (BWs) have been calculated. From the comparison of these values with other data, the contribution of BWs to the generation of turbulence has been determined. The comparison confirms the validity of the turbulence charac…
Venus Express: The presence of turbulence in the mesosphere of venus is confirmed
Izakov, M. N.
Among the numerous and valuable results obtained from the Venus Express spacecraft, information from several instruments suggests that turbulence is present in the mesosphere. In this paper, the results of these experiments are interpreted with the use of the available data on turbulence in planetary atmospheres. Accounting for turbulence is neces…
Venus express: Highlights of the nominal mission
Fedorov, A.; Barabash, S.; Sauvaud, J. -A. +18 more
Venus Express is the first European (ESA) mission to the planet Venus. Its main science goal is to carry out a global survey of the atmosphere, the plasma environment, and the surface of Venus from orbit. The payload consists of seven experiments. It includes a powerful suite of remote sensing imagers and spectrometers, instruments for in-situ inv…