Search Publications
Gravity Wave Activity in the Martian Atmosphere at Altitudes 20-160 km From ACS/TGO Occultation Measurements
Montmessin, Franck; Starichenko, Ekaterina D.; Belyaev, Denis A. +7 more
The paper presents observations of gravity wave-induced temperature disturbances in the Martian atmosphere obtained with the mid-infrared (MIR) spectrometer, a channel of the Atmospheric Chemistry Suite instrument on board the Trace Gas Orbiter (ACS/TGO). Solar occultation measurements of a CO2 absorption band at 2.7 µm were used for retriev…
Martian Hydrated Minerals: A Significant Water Sink
Jakosky, Bruce M.; Wernicke, Liza J.
Quantifying the water in all Martian water reservoirs is important for understanding the history of water on Mars, including Mars' past climate and potential for habitability. Hydrated minerals are widespread on Mars and may comprise a significant portion of the water inventory. We calculated the possible volumes of water stored within and require…
Jupiter's Temperate Belt/Zone Contrasts Revealed at Depth by Juno Microwave Observations
Bolton, S.; Fletcher, L. N.; Wong, M. H. +12 more
Juno microwave radiometer (MWR) observations of Jupiter's midlatitudes reveal a strong correlation between brightness temperature contrasts and zonal winds, confirming that the banded structure extends throughout the troposphere. However, the microwave brightness gradient is observed to change sign with depth: the belts are microwave-bright in the…
The Aeolian Environment of the Landing Site for the ExoMars Rosalind Franklin Rover in Oxia Planum, Mars
Fawdon, P.; Balme, M. R.; Grindrod, P. M. +4 more
Aeolian features at Oxia Planum—the 2023 landing site for the ExoMars Rosalind Franklin Rover (ERFR)—are important for Mars exploration because they record information about past and current wind regimes, sand transport vectors, and lend insight to the abrasion, deposition, and transport of granular material. To characterize the wind regime and er…
Stratigraphic Relationships in Jezero Crater, Mars: Constraints on the Timing of Fluvial-Lacustrine Activity From Orbital Observations
Hauber, E.; Gupta, S.; Quantin-Nataf, C. +15 more
On February 18, 2021 NASA's Perseverance rover landed in Jezero crater, located at the northwestern edge of the Isidis basin on Mars. The uppermost surface of the present-day crater floor is dominated by a distinct geologic assemblage previously referred to as the dark-toned floor. It consists of a smooth, dark-toned unit overlying and variably co…
ExoMars TGO/NOMAD-UVIS Vertical Profiles of Ozone: 1. Seasonal Variation and Comparison to Water
Aoki, S.; Vandaele, A. C.; Daerden, F. +23 more
We present ∼1.5 Mars Years (MY) of ozone vertical profiles, covering LS = 163° in MY34 to LS = 320° in MY35, a period which includes the 2018 global dust storm. Since April 2018, the Ultraviolet and Visible Spectrometer channel of the Nadir and Occultation for Mars Discovery (NOMAD) instrument aboard the ExoMars Trace Gas Orb…
Where are Mars' Hypothesized Ocean Shorelines? Large Lateral and Topographic Offsets Between Different Versions of Paleoshoreline Maps
Catling, David C.; Dickeson, Zachary I.; Sholes, Steven F. +1 more
Mars' controversial hypothesized ocean shorelines have been found to deviate significantly from an expected equipotential surface. While multiple deformation models have been proposed to explain the wide range of elevations, here we show that the historical locations used in the literature and in these models vary widely. We find that the most com…
Seasonal and Geographical Variability of the Martian Ionosphere From Mars Express Observations
González-Galindo, F.; Němec, F.; Tellmann, S. +4 more
We study the seasonal and geographical variability of the peak electron density and the altitude of the main ionospheric peak at Mars. For this purpose, we use the data obtained by the ESA Mars Express mission, namely by the radar MARSIS and the radio occultation experiment MaRS. The accumulation of data during the long lifetime of Mars Express pr…
The Composition of the South Polar Cap of Mars Derived From Orbital Data
Wieczorek, M. A.; Broquet, A.; Fa, W.
The flexure of the lithosphere under stresses imposed by the geologically young south polar cap is one of the few clues we have regarding the south polar cap composition and the present-day thermal state of Mars. Here, we combine radar, gravity, and topography data with a flexural loading model to estimate the bulk density (ρ) and average real die…
Morphology, Morphometry and Distribution of Isolated Landforms in Southern Chryse Planitia, Mars
Fawdon, Peter; Balme, Matthew R.; McNeil, Joseph D. +1 more
The margin of Chryse Planitia, Mars, contains >105 kilometer scale mesas, buttes, and plateaus ("mounds"), many of which are found in and around Oxia Planum, the ExoMars 2022 Rover landing site. Despite this, their origins and evolution are unknown. We have analyzed the morphologies and morphometries of 14,386 individual mounds to: (…