Search Publications
On the impact of the vertical structure of Martian water ice clouds on nadir atmospheric retrievals from simultaneous EMM/EXI and TGO/ACS-MIR observations.
Trokhimovskiy, Alexander; Korablev, Oleg; Fedorova, Anna +3 more
Retrieving the optical depth of the Martian clouds (
Inversion of ultraviolet occultation profiles in a dusty atmosphere: Analytic and numerical methods
Gérard, J. -C.; Hubert, B.; Soret, L. +4 more
Over the last two decades, important efforts have been undertaken by the most prominent space agencies to explore and analyze the interior, ground and atmosphere of Mars. A series of remote sensing instruments have been deployed and operated to characterize the atmospheric composition and dynamics. Several techniques have been used including solar…
Evidence of rapid hydrogen chloride uptake on water ice in the atmosphere of Mars
Montmessin, Franck; Fedorova, Anna A.; Trokhimovskiy, Alexander +5 more
In 2020, hydrogen chloride (HCl) in the gas phase was discovered in the atmosphere of Mars with the Atmospheric Chemistry Suite (ACS) onboard the Trace Gas Orbiter (TGO) mission (Korablev et al., 2021). Its volume mixing ratio (VMR) shows a seasonal increase of up to 5 ppbv during the perihelion season, followed by a sudden drop to undetectable le…
Revised upper limits for abundances of NH3, HCN and HC3N in the Martian atmosphere
Montmessin, F.; Korablev, O.; Fedorova, A. A. +7 more
The Atmospheric Chemistry Suite (ACS) onboard the ExoMars Trace Gas Orbiter (TGO) spacecraft has been studying Mars' atmosphere since 2018. The sensitivity of the middle infrared channel (MIR) allows it to address many ardent topics and it is capable of improving and establishing upper limits for many trace species. In this work we present analysi…
Novel quantitative methods to enable multispectral identification of high-purity water ice exposures on Mars using High Resolution Imaging Science Experiment (HiRISE) images
Munaretto, G.; Dundas, C. M.; Seelos, F. P. +8 more
Reliable detection and characterization of water ice on the Martian surface is pivotal to not only understand its present and past climate, but to also provide valuable information on in-situ resource availability and distribution for future human exploration missions. Ice-rich features are currently identified with visible/near-IR (VNIR), thermal…
Glacial sculpting of a martian cratered landscape on the northeastern flank of the Hellas basin
Moore, Jeffrey M.; Wilson, Sharon A.; Howard, Alan D. +2 more
The interiors and exteriors of the >25 km diameter Batson, Nako, Salkhad, and Jori craters (and McCauley crater to a lesser degree) on the northeastern rim of Hellas basin, Mars, were extensively modified by glacio-fluvial and glacio-lacustrine activity during the Middle and Late Amazonian, from some time before 1.4 Ga to the present as reveale…
Effects of surface and subsurface water/ice on spatial distributions of impact crater ejecta on Mars
Wünnemann, Kai; Thomas, Nicolas; Sokołowska, Aleksandra
Ejecta blankets around craters on a km-scale show stark differences in the ejecta mobility (maximal extent of ejecta divided by the crater radius) with latitude and types of plains on Mars, which has been known for a long time (Barlow and Pollak, 2002; Li et al., 2015) but is not well-understood. Our main goal is to explore the idea that the subsu…
Observation of the Southern Polar cap during MY34-36 with ExoMars-TGO NOMAD LNO
Vandaele, A. C.; Daerden, F.; Thomas, I. R. +12 more
Mainly designed to study minor atmospheric species in the Martian atmosphere, the Nadir and Occultation for MArs Discovery (NOMAD) instrument suite onboard the 2016 ExoMars Trace Gas Orbiter (TGO) can also be exploited for surface ice detection. In this work, we investigate the nadir observations of the NOMAD infrared channel from the Martian Year…
CO2 in the atmosphere of Mars depleted in 13C
Vandaele, Ann Carine; Aoki, Shohei; Liuzzi, Giuliano +14 more
We present here vertically resolved measurements of the carbon isotopic composition of CO2 in the Martian atmosphere between the surface and 50 km of altitude. The results are based on data taken by the ExoMars Trace Gas Orbiter with the NOMAD instrument and have been aggregated to derive an average vertical profile of 13C/
Seasonal low albedo streaks at the edge of the Martian south polar layered deposits
Lucchetti, Alice; Pajola, Maurizio; Cremonese, Gabriele +6 more
Low Albedo Streaks (LAS) are narrow dark streaks observed at the edges of the South Polar Layered Deposits (SPLD) on Mars. We investigate the seasonal morphology, surface topography of LAS-rich areas using monochrome and multiband images from both the High Resolution Imaging Science Experiment (HiRISE) and the Color and Stereo Surface Imaging Syst…