Search Publications
Assimilation of Temperatures and Column Dust Opacities Measured by ExoMars TGO-ACS-TIRVIM During the MY34 Global Dust Storm
Montmessin, Franck; Trokhimovskiy, Alexander; Korablev, Oleg +7 more
We assimilate atmospheric temperature profiles and column dust optical depth observations from the ExoMars Trace Gas Orbiter Atmospheric Chemistry Suite thermal infrared channel (TIRVIM) into the Mars Planetary Climate Model. The assimilation period is Mars Year 34 Ls = 182.3°-211.4°, covering the onset and peak of the 2018 global dust …
Dynamical Effect on Static Stability of the Venus Atmosphere Simulated Using a General Circulation Model: A Comparison With Radio Occultation Measurements
Tellmann, Silvia; Pätzold, Martin; Imamura, Takeshi +10 more
Distributions of temperature and static stability in the Venus atmosphere consistent with recent radio occultation measurements are reproduced using a general circulation model. A low-stability layer is maintained at low- and mid-latitudes at 50-60 km altitude and is sandwiched by high- and moderate-stability layers extending above 60 and below 50…
Structural Architecture and Deformation History of Tempe Terra, Mars
Thomas, M.; Orlov, C. J.; Bramham, E. K. +3 more
The structurally complex region of Tempe Terra, located in the northeast of the Tharsis Rise on Mars, preserves deformation related to the growth of Tharsis and lies along the trendline formed by the Tharsis Montes volcanoes. We characterize the spatiotemporal tectonic evolution of Tempe Terra based on comprehensive structural mapping. From this m…
Canyon Wall and Floor Debris Deposits in Aeolis Mons, Mars
Arvidson, R. E.; Hughes, M. N.; Dietrich, W. E. +4 more
Aeolis Mons (informally, Mount Sharp) exhibits a number of canyons, including Gediz and Sakarya Valles. Poorly sorted debris deposits are evident on both canyon floors and connect with debris extending down the walls for canyon segments that cut through sulphate-bearing strata. On the floor of Gediz Vallis, debris overfills a central channel and m…
Energy Exchanges in Saturn's Polar Regions From Cassini Observations: Eddy-Zonal Flow Interactions
Read, Peter L.; Sanchez-Lavega, Agustin; Antuñano, Arrate +3 more
Saturn's polar regions (polewards of ∼63° planetocentric latitude) are strongly dynamically active with zonal jets, polar cyclones and the intriguing north polar hexagon (NPH) wave. Here we analyze measurements of horizontal winds, previously obtained from Cassini images by Antuñano et al. (2015), htt…
Hydrological History of a Palaeolake and Valley System on the Planetary Dichotomy in Arabia Terra, Mars
Grindrod, P. M.; Davis, J. M.; Balme, M. +2 more
Hundreds of ancient palaeolake basins have been identified and cataloged on Mars, indicating the distribution and availability of liquid water as well as sites of astrobiological potential. Palaeolakes are widely distributed across the Noachian aged terrains of the southern highlands, but Arabia Terra hosts few documented palaeolakes and even fewe…
Martian Atmospheric Spectral End-Members Retrieval From ExoMars Thermal Infrared (TIRVIM) Data
Grigoriev, A.; Korablev, O.; Arnold, G. +7 more
Key knowledge about planetary composition can be recovered from the study of thermal infrared spectral range datasets. This range has a huge diagnostic potential because it contains diagnostic absorptions from a planetary surface and atmosphere. The main goal of this study is to process and interpret the dataset from the Thermal Infrared channel (…
Multi-Annual Monitoring of the Water Vapor Vertical Distribution on Mars by SPICAM on Mars Express
Montmessin, Franck; Trokhimovskiy, Alexander; Bertaux, Jean-Loup +3 more
The distribution of water vapor with altitude has long remained a missing piece of the observational data set of water vapor on Mars. In this study, we present the first multi-annual survey of water vapor profile covering the altitude range from 0 to 100 km based on the SPICAM/Mars Express occultation measurements. During the aphelion season, wate…
Relationship Between the Ozone and Water Vapor Columns on Mars as Observed by SPICAM and Calculated by a Global Climate Model
Forget, F.; Montmessin, F.; Fedorova, A. +10 more
Ozone (O3) in the atmosphere of Mars is produced following the photolysis of CO2 and is readily destroyed by the hydrogen radicals (HOx) released by the photolysis and oxidation of water vapor. As a result, an anti correlation between ozone and water vapor is expected. We describe here the O3 H2
Small Volcanic Vents of the Tharsis Volcanic Province, Mars
Richardson, J. A.; Bleacher, J. E.; Connor, C. B. +1 more
Distributed style volcanism is an end member of terrestrial volcanism that produces clusters of small volcanoes when isolated magma bodies ascend from broad magma source regions. Volcano clusters can develop over millions of years, one volcano at a time, and can be used to infer unobserved geologic phenomena, including subsurface stresses and crac…