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View article: Exploring gravity wave activity in the Martian atmosphere using ExoMars TGO/NOMAD observations and modelling
Exploring gravity wave activity in the Martian atmosphere using ExoMars TGO/NOMAD observations and modelling Open
On Mars, gravity-wave induced density and temperature fluctuations have been observed by orbiting platforms (e.g. [1-5]), during aerobraking [6-7] and from the surface [8]. Their effects are also seen in airglow imagery [9].We present a cl…
View article: Determination of the Venus upper atmosphere gas concentration combining the SOIR/Venus Express and Torque aerobreaking observations
Determination of the Venus upper atmosphere gas concentration combining the SOIR/Venus Express and Torque aerobreaking observations Open
Until the ESA Venus Express mission, the Venus mesosphere was a poorly understood region of Venus’s atmosphere. This mission revealed the composition and thermal structure of the mesosphere and lower-thermosphere [1] with the help of its s…
View article: Investigating the Origin of Venus’ Clouds Using a Cloud Microphysics Model
Investigating the Origin of Venus’ Clouds Using a Cloud Microphysics Model Open
Sulfuric acid clouds on Venus play a pivotal role in atmospheric radiation, chemistry, and material transport. Therefore, understanding the mechanisms underlying cloud formation on Venus is essential for gaining a better insight into the p…
View article: Martian CO vertical distribution combining 3 Martian Years of TGO/ACS MIR solar occultation data
Martian CO vertical distribution combining 3 Martian Years of TGO/ACS MIR solar occultation data Open
Carbon monoxide (CO) has extensively been monitored in the martian atmosphere due to its dual significance: it provides insights into the dymanics and into photochemical processes between this molecule with others in the Martian atmosphere…
View article: The interannual vertical distribution of ozone in the Mars atmosphere and observation-model discrepancies
The interannual vertical distribution of ozone in the Mars atmosphere and observation-model discrepancies Open
The Nadir and Occultation for Mars Discovery (NOMAD) instrument aboard the ExoMars Trace Gas Orbiter (TGO) has been conducting observations of the vertical profile and column abundance of ozone in the Mars atmosphere since April 2018. NOMA…
View article: Global mapping of molecular oxygen on Mars
Global mapping of molecular oxygen on Mars Open
Recent observations by NASA’s Curiosity Rover have revealed unexpected seasonal changes in molecular oxygen (O2) levels in the Martian atmosphere at Gale Crater, its landing site [1]. This finding is puzzling, as the atmospheric lifetime o…
View article: Mesospheric and thermospheric temperatures on Mars: comparing a multi-mission dataset with a Global Climate Model
Mesospheric and thermospheric temperatures on Mars: comparing a multi-mission dataset with a Global Climate Model Open
The study of the coupling between the lower and the upper atmosphere has been hindered by the lack of continuous temperature measurements covering the whole atmosphere from the surface to the exobase. Thus, a large fraction of our knowledg…
View article: Biases on the retrieval of aerosols' properties from VIS-NIR data: the NOMAD case study
Biases on the retrieval of aerosols' properties from VIS-NIR data: the NOMAD case study Open
Data acquired by spaceborne spectrometers operating in the visual (VIS) and near-infrared (NIR) spectral ranges, are commonly exploited to derive the microphysical properties of planetary atmospheric aerosols (e.g. Adriani et al., 2015; Si…
View article: Towards a new climatology of Martian water vapor column abundance derived from NOMAD LNO nadir full mission observations
Towards a new climatology of Martian water vapor column abundance derived from NOMAD LNO nadir full mission observations Open
Water vapor (H2O) is a highly variable minor constituent of the Martian atmosphere. Through its well characterized seasonal cycle, it controls, together with CO2 and dust cycles, the present Mars climate. In particular, H2O plays a crucial…
View article: VenSpec Radiative Transfer Modeling Working Group
VenSpec Radiative Transfer Modeling Working Group Open
The VenSpec suite is a set of three spectrometers on board the EnVision M5 mission, which was adopted by ESA in 2024 to be launched in late 2031. EnVision is a medium class mission designed to assess, and possibly quantify, the nature and …
View article: Advancing Diversity and Inclusion within Europlanet
Advancing Diversity and Inclusion within Europlanet Open
Europlanet is a non-profit association that promotes the advancement of European planetary science and related fields, for the benefit of the community, and is open to individual and organisational members. We are dedicated to creating a d…
View article: The ExoMars 2016 Trace Gas Orbiter: Recent Results from NOMAD
The ExoMars 2016 Trace Gas Orbiter: Recent Results from NOMAD Open
The ExoMars Trace Gas Orbiter has been operating around Mars since April 2018, amassing a wealth of knowledge about the atmosphere and surface of the Red Planet. Onboard are two spectrometer suites, NOMAD and ACS, a surface camera, CASSIS,…
View article: Long-Term variations in Mars’ ozone column abundances : A study from MY34 to MY38
Long-Term variations in Mars’ ozone column abundances : A study from MY34 to MY38 Open
Measurement of the Mars ozone column abundance provide key insights about our understanding of the planet’s photochemistry, climate dynamics, and potential habitability. Ozone acts as a tracer for odd-hydrogen offering insights into its se…
View article: Parameters to assess the impact of regularisation on remotely sensed atmospheric profiles.
Parameters to assess the impact of regularisation on remotely sensed atmospheric profiles. Open
The atmosphere of Mars is the second most sounded atmosphere after the one of Earth. The wealth of datasets is now important enough to make direct comparisons of retrieved atmospheric parameters. Those comparisons can reveal biases that ca…
View article: VenSpec-H spectrometer on the ESA EnVision mission: Instrument’s status
VenSpec-H spectrometer on the ESA EnVision mission: Instrument’s status Open
VenSpec-H is part of the VenSpec suite [1], also including an IR mapper and a UV spectrometer [2]. The suite science objectives are to search for temporal variations in surface temperatures and tropospheric concentrations of volcanically e…
View article: The 2025 Edition of the Planetary Science Wiki Edit-a-thon
The 2025 Edition of the Planetary Science Wiki Edit-a-thon Open
Introduction: The Planetary Science Wiki Edit-a-thon is a science outreach project with the goal to highlight diversity within the international planetary science community. It promotes the creation of Wikipedia articles about women planet…
View article: Out-of-season water escape during Mars’ northern summer triggered by a strong localized dust storm
Out-of-season water escape during Mars’ northern summer triggered by a strong localized dust storm Open
Mars almost certainly had a significant amount of water in its past. Recent observations reveal that during southern summer, when the atmosphere is warmer and dustier, water vapor can reach high altitudes without condensing, leading to wat…
View article: A Microphysics Model of Multicomponent Venus' Clouds With a High‐Accuracy Condensation Scheme
A Microphysics Model of Multicomponent Venus' Clouds With a High‐Accuracy Condensation Scheme Open
Accurate modeling of the Venusian cloud structure remains challenging due to its complex microphysical properties. Condensation primarily determines the cloud particle size distribution within the various cloud layers. However, existing Ve…
View article: Water Vapor Vertical Distribution on Mars after Six Years of TGO/NOMAD Solar Occultations. Part II: Cross-validation within TGO and comparison with models
Water Vapor Vertical Distribution on Mars after Six Years of TGO/NOMAD Solar Occultations. Part II: Cross-validation within TGO and comparison with models Open
International audience
View article: Scientific objectives and instrumental requirements of the infrared spectrometer VenSpec-H onboard EnVision
Scientific objectives and instrumental requirements of the infrared spectrometer VenSpec-H onboard EnVision Open
International audience
View article: Design of the VenSpec-H instrument on ESA’s EnVision mission: development of critical elements, highlighting the wavefront corrector and grating
Design of the VenSpec-H instrument on ESA’s EnVision mission: development of critical elements, highlighting the wavefront corrector and grating Open
De Cock, Roderick et al.-- Full list of authors: De Cock, Roderick; Robert, Séverine; Neefs, Eddy; Erwin, Justin; Vervaeke, Michael; Thienpont, Hugo; Renotte, Etienne; Klinkenberg, Philippe; Borguet, Benoit; Thomas, Solal; Moelans, Wouter;…
View article: A Case Study on the Impact of Interplanetary Coronal Mass Ejection on the Martian O(<sup>1</sup>S) 557.7 nm Dayglow Emission Using ExoMars TGO/NOMAD‐UVIS Observations: First Results
A Case Study on the Impact of Interplanetary Coronal Mass Ejection on the Martian O(<sup>1</sup>S) 557.7 nm Dayglow Emission Using ExoMars TGO/NOMAD‐UVIS Observations: First Results Open
We report, for the first time, the impact of interplanetary coronal mass ejections (ICME) on the recently discovered O( 1 S) 557.7 nm dayglow emission in the Martian atmosphere. While there are a few studies on the seasonal variation of 55…
View article: Aerosol Climatology on Mars as Observed by NOMAD UVIS on ExoMars TGO
Aerosol Climatology on Mars as Observed by NOMAD UVIS on ExoMars TGO Open
The Nadir and Occultation for MArs Discovery spectrometer on board Trace Gas Orbiter began science operations in April 2018, providing infrared and ultraviolet‐visible spectra of the Martian atmosphere. This paper explores the application …
View article: Ultraviolet NO and Visible O<sub>2</sub> Nightglow in the Mars Southern Winter Polar Region: Statistical Study and Model Comparison
Ultraviolet NO and Visible O<sub>2</sub> Nightglow in the Mars Southern Winter Polar Region: Statistical Study and Model Comparison Open
The Mars NO and the O 2 nightglow are produced by the recombination of atoms produced on the dayside by photodissociation and transported to the nightside. These emissions are tracers of the summer to winter pole dynamics in the upper Mars…
View article: Composition and Chemistry of the Martian Atmosphere as Observed by Mars Express and ExoMars Trace Gas Orbiter
Composition and Chemistry of the Martian Atmosphere as Observed by Mars Express and ExoMars Trace Gas Orbiter Open
View article: Stable carbon isotope evolution of formaldehyde on early Mars
Stable carbon isotope evolution of formaldehyde on early Mars Open
Organic matter in the Martian sediments may provide a key to understanding the prebiotic chemistry and habitability of early Mars. The Curiosity rover has measured highly variable and 13C-depleted carbon isotopic values in early…
View article: Unexpected increase of the deuterium to hydrogen ratio in the Venus mesosphere
Unexpected increase of the deuterium to hydrogen ratio in the Venus mesosphere Open
This study analyzes H 2 O and HDO vertical profiles in the Venus mesosphere using Venus Express/Solar Occultation in the InfraRed data. The findings show increasing H 2 O and HDO volume mixing ratios with altitude, with the D/H ratio risin…
View article: A case study on the impact of interplanetary coronal mass ejection on the Martian O(1S) 557.7 nm dayglow emission using ExoMars TGO/NOMAD-UVIS observations: First Results
A case study on the impact of interplanetary coronal mass ejection on the Martian O(1S) 557.7 nm dayglow emission using ExoMars TGO/NOMAD-UVIS observations: First Results Open
We report, for the first time, the impact of an interplanetary coronal mass ejection (ICME) on the recently discovered O($^1$S) 557.7 nm dayglow emission in the Martian atmosphere. Although there are only a few studies on the seasonal vari…
View article: Experimental Scattering Matrices of Martian Dust Aerosols with Narrow Particle-size Distributions
Experimental Scattering Matrices of Martian Dust Aerosols with Narrow Particle-size Distributions Open
We present experimental scattering matrices of the JSC Mars-1, MMS-2, and MGS-1 simulants at 488 and 640 nm. The analogs were processed so that narrow size distributions representative of Martian dust aerosols during different dust cycles …
View article: Strong Localized Pumping of Water Vapor to High Altitudes on Mars During the Perihelion Season
Strong Localized Pumping of Water Vapor to High Altitudes on Mars During the Perihelion Season Open
Here we present water vapor vertical profiles observed with the ExoMars Trace Gas Orbiter/Nadir and Occultation for MArs Discovery instrument during the perihelion and Southern summer solstice season ( L S = 240°–300°) in three consecutive…