Search Publications
Variations in Venusian magnetic topology during an interplanetary coronal mass ejection passage: A multifluid magnetohydrodynamics study
Cao, Jinbin; Mazelle, Christian; Ge, Yasong +7 more
The global effects on Venusian magnetic topology and ion escape during the significant solar-wind disturbances caused by the interplanetary coronal mass ejection (ICME) remain an open area of research. This study examined a particularly intense ICME interaction with Venus on November 5, 2011, using a global multifluid magnetohydrodynamics (MHD) mo…
An investigation into Venusian atmospheric chemistry based on an open-access photochemistry-transport model at 0–112 km
Sheng, Zheng; Dai, Longkang; Shao, Wencheng
Atmospheric chemistry plays a crucial role in the evolution of climate habitability on Venus. It has been widely explored by chemistry-transport models, but some characteristics are still poorly interpreted. This study is devoted to developing an open-access chemistry-transport model spanning both the middle and lower atmospheres of Venus. It prov…
The magnetic field clock angle departure in the Venusian magnetosheath and its response to IMF rotation
Xu, Qi; Zhang, Tielong; Rong, Zhaojin +4 more
We investigate the characteristics of interplanetary magnetic field (IMF) draping in the Venusian magnetosheath using both Venus Express (VEX) observations and magnetohydrodynamics simulations. The distributions of magnetosheath field clock angle illustrate the nearly symmetric morphology of draped magnetic field with respect to the solar wind ele…
Determination of the eddy diffusion in the Venusian clouds from VeRa sulfuric acid observations
Sheng, Zheng; Dai, Longkang; Shao, Wencheng +1 more
Context. The vertical eddy diffusion coefficient (Kzz) characterizing the efficiency of vertical atmospheric mixing is essential for 1D planetary atmospheric modeling, but poorly constrained in the Venusian clouds, where our ability to observe tracer gases is limited. The Venusian clouds are mainly composed of H2SO4
Linear and nonlinear kinetic Alfvén waves at Venus
Fichtner, H.; Lazar, M.; Moslem, W. M. +1 more
Space observations show that Venus suffers significant atmospheric erosion caused by the solar wind forcing. Plasma acceleration is found to be one of the main mechanisms contributing to the global atmospheric loss at Venus through its magnetotail. Motivated by these observations, we propose that kinetic Alfvén waves (KAW) may be a possible candid…
Modelling a multi-spacecraft coronal mass ejection encounter with EUHFORIA
Palmerio, E.; Temmer, M.; Poedts, S. +6 more
Context. Coronal mass ejections (CMEs) are a manifestation of the Sun's eruptive nature. They can have a great impact on Earth, but also on human activity in space and on the ground. Therefore, modelling their evolution as they propagate through interplanetary space is essential.
Aims: EUropean Heliospheric FORecasting Information Asset (EUHF…
The Venus Express observation of Venus' induced magnetosphere boundary at solar maximum
Zhang, T. L.; Wang, X.; Rong, Z. J. +9 more
The Venusian plasma environment is divided into two distinct regions by the induced magnetosphere boundary (IMB): the domain of solar wind protons and the domain of local planetary ions. Previous studies on the identification of the IMB gave various IMB definitions. Here we study the well-structured Venusian IMB with a sudden magnetic field rotati…
Evidence for SO2 latitudinal variations below the clouds of Venus
Bézard, B.; Marcq, E.; Amine, I. +1 more
Context. Sulphur dioxide (SO2) is highly variable above the clouds of Venus, yet no spatial or temporal variability below the clouds had been known until now.
Aims: In order to constrain Venus's atmospheric circulation and chemistry (including possible volcanic outgassing), more accurate SO2 measurements below the clouds…
Energetic ions in the Venusian system: Insights from the first Solar Orbiter flyby
Kulkarni, S. R.; Maksimovic, M.; Bale, S. D. +54 more
The Solar Orbiter flyby of Venus on 27 December 2020 allowed for an opportunity to measure the suprathermal to energetic ions in the Venusian system over a large range of radial distances to better understand the acceleration processes within the system and provide a characterization of galactic cosmic rays near the planet. Bursty suprathermal ion…
Characterising atmospheric gravity waves on the nightside lower clouds of Venus: a systematic analysis
Lebonnois, S.; Machado, P.; Peralta, J. +3 more
We present the detection and characterisation of mesoscale waves on the lower clouds of Venus using images from the Visible Infrared Thermal Imaging Spectrometer onboard the European Venus Express space mission and from the 2 µm camera (IR2) instrument onboard the Japanese space mission Akatsuki. We used image navigation and processing techn…