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…

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 L_S = 163° in MY34 to L_S = 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…

ExoMars TGO/NOMAD-UVIS Vertical Profiles of Ozone: 2. The High-Altitude Layers of Atmospheric Ozone

Thomas, Ian; Daerden, Frank; Ristic, Bojan +12 more

Solar occultations performed by the Nadir and Occultation for MArs Discovery (NOMAD) ultraviolet and visible spectrometer (UVIS) onboard the ExoMars Trace Gas Orbiter (TGO) have provided a comprehensive mapping of atmospheric ozone density. The observations here extend over a full Mars year (MY) between April 21, 2018 at the beginning of the TGO s…

A Global and Seasonal Perspective of Martian Water Vapor From ExoMars/NOMAD

Aoki, S.; Vandaele, A. C.; Daerden, F. +18 more

Slightly less than a Martian Year of nominal science (March 2018-January 2020) with the ExoMars Trace Gas Orbiter has furthered the ongoing investigation of dayside water vapor column abundance. These dayside observations span latitudes between 75°S and 75°N, and all longitudes, which can provide global snapshots of the total water column abundanc…

Isotopic Composition of CO₂ in the Atmosphere of Mars: Fractionation by Diffusive Separation Observed by the ExoMars Trace Gas Orbiter

Montmessin, Franck; Belyaev, Denis A.; Fedorova, Anna A. +11 more

Isotopic ratios in atmospheric CO₂ are shaped by various processes throughout Mars' history, and can help understand what the atmosphere of early Mars was like to sustain liquid water on its surface. In this study, we monitor the O and C isotopic composition of CO₂ between 70 and 130 km for more than half a Martian year using…

Constraints on Emission Source Locations of Methane Detected by Mars Science Laboratory

Newman, C. E.; Richardson, M. I.; Viúdez-Moreiras, D.

The Sample Analysis at Mars (SAM) instrument on the Mars Science Laboratory (MSL) Curiosity rover has detected both methane spikes and variable background methane abundance in recent years in Gale Crater, Mars. While methane spikes have been attributed to a hypothetical local or regional source emission, the background measurements acquired during…