Search Publications

The Deuterium Isotopic Ratio of Water Released From the Martian Caps as Measured With TGO/NOMAD

Vandaele, Ann Carine; Brines, Adrian; Aoki, Shohei +18 more

We report vertical profiles of water and D/H for one Martian year as measured with the TGO/NOMAD instrument. The observations were performed via solar occultation, providing water profiles up to ∼100 km and D/H up to ∼60 km, with a vertical resolution of 1-2 km. The measurements reveal dramatic variability of water and D/H over short timescales an…

Thermal Tides in the Martian Atmosphere Near Northern Summer Solstice Observed by ACS/TIRVIM Onboard TGO

Montmessin, Franck; Trokhimovskiy, Alexander; Korablev, Oleg +8 more

Thermal tides in the Martian atmosphere are analyzed using temperature profiles retrieved from nadir observations obtained by the TIRVIM Fourier-spectrometer, part of the Atmospheric Chemistry Suite onboard the ExoMars Trace Gas Orbiter. The data is selected near the northern summer solstice at solar longitude (L_S) 75°-105° of Martian Y…

Planet-Wide Ozone Destruction in the Middle Atmosphere on Mars During Global Dust Storm

Aoki, S.; Vandaele, A. C.; Daerden, F. +22 more

The Nadir and Occultation for MArs Discovery (NOMAD)/UV-visible (UVIS) spectrometer on the ExoMars Trace Gas Orbiter provided observations of ozone (O₃) and water vapor in the global dust storm of 2018. Here we show in detail, using advanced data filtering and chemical modeling, how Martian O₃ in the middle atmosphere was des…

Variations in Vertical CO/CO₂ Profiles in the Martian Mesosphere and Lower Thermosphere Measured by the ExoMars TGO/NOMAD: Implications of Variations in Eddy Diffusion Coefficient

Vandaele, Ann Carine; Modak, Ashimananda; Brines, Adrian +19 more

Using the Nadir and Occultation for MArs Discovery instrument aboard Trace Gas Orbiter, we derived the CO/CO₂ profiles between 75 and 105 km altitude with the equivalent width technique. The derived CO/CO₂ profiles showed significant seasonal variations in the southern hemisphere with decreases near perihelion and increases n…