Guillaume Gronoff
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View article: The Exospace Weather Frontier
The Exospace Weather Frontier Open
Space weather is among the most powerful and least understood forces shaping planetary atmospheres. We observe its effects directly on Solar System bodies through atmospheric escape, chemical disruption, cometary tails, and auroral display…
View article: Precipitating electron properties of Ganymede’s aurora retrieved from Juno/UVS observations during PJ34
Precipitating electron properties of Ganymede’s aurora retrieved from Juno/UVS observations during PJ34 Open
Context . Ganymede’s UV aurorae, observed by HST and Juno/UVS, trace interactions between its atmosphere and Jupiter’s magneto-sphere. These emissions, dominated by O I lines at 130.4 and 135.6 nm, are driven by electron impact on species …
View article: Characterizing Precipitating Electrons in Ganymede’s Auroras through Juno/UVS observations and Coupled Electron Transport and Radiative Transfer Models
Characterizing Precipitating Electrons in Ganymede’s Auroras through Juno/UVS observations and Coupled Electron Transport and Radiative Transfer Models Open
Auroral emissions provide key insights into interactions between planetary magnetic fields, atmospheres, and surrounding plasma. While Jupiter’s aurorae are well-studied, those of Ganymede, the only moon with an intrinsic magnetic field in…
View article: NAIRAS Version 3 Atmospheric Ionizing Radiation Validation: Comparisons to RaD‐X Measurements
NAIRAS Version 3 Atmospheric Ionizing Radiation Validation: Comparisons to RaD‐X Measurements Open
The Nowcast of Aerospace Ionizing RAdiation System (NAIRAS) model predicts dosimetric and radiative flux quantities for assessing human radiation exposure levels and radiation effects on flight electronic systems from the surface of the Ea…
View article: Reconstruction of the 3D Auroral Structure Using Juno/UVS Observations
Reconstruction of the 3D Auroral Structure Using Juno/UVS Observations Open
Jovian auroras, the most intense in the Solar System, arise from interactions between Jupiter’s magnetosphere and atmosphere. While their horizontal morphology has been extensively studied, their vertical structure, shaped by the pen…
View article: A rare observation from mid-latitude of a blue aurora
A rare observation from mid-latitude of a blue aurora Open
Aurora observations at mid-latitudes are rare but not exceptional. The aurorae are usually seen as diffuse red illuminations of the sky above the Northern (respectively Southern) horizon (respectively in the northern and southern hemispher…
View article: Auroral 3D structure retrieval from the Juno/UVS data
Auroral 3D structure retrieval from the Juno/UVS data Open
Context. Jovian auroras, the most powerful in the Solar System, result from the interaction between the magnetosphere and atmosphere of Jupiter. While the horizontal morphology of these phenomena has been widely studied, their vertical str…
View article: High-resolution large-eddy simulation to understand ozone formation and atmospheric oxidation capacity in Houston, Texas
High-resolution large-eddy simulation to understand ozone formation and atmospheric oxidation capacity in Houston, Texas Open
Highly reactive volatile organic compounds (HRVOCs) from mobile and petrochemical sources are important players in atmospheric photochemistry that contribute to the formation of ozone (O3). In a typical elevated O3 episode, we applied a hi…
View article: TOLNet validation of satellite ozone profiles in the troposphere: impact of retrieval wavelengths
TOLNet validation of satellite ozone profiles in the troposphere: impact of retrieval wavelengths Open
The Tropospheric Ozone Lidar Network (TOLNet) was used to validate retrievals of ozone (O3) profiles in the troposphere from the TROPOspheric Monitoring Instrument (TROPOMI) ultraviolet (UV), Cross-track Infrared Sounder (CrIS) infrared (I…
View article: Characterization of Radiation Exposure at Aviation Flight Altitudes Using the Nowcast of Aerospace Ionizing Radiation System (NAIRAS)
Characterization of Radiation Exposure at Aviation Flight Altitudes Using the Nowcast of Aerospace Ionizing Radiation System (NAIRAS) Open
Exposure to ionizing radiation from galactic cosmic rays (GCR) and solar energetic particles (SEP) at aircraft flight altitudes can have an adverse effect on human health. Although airline crews are classified as radiation workers by the I…
View article: Full Moon Phase: Lunar Surface Charging in Plasma Sheet - PIC Simulation
Full Moon Phase: Lunar Surface Charging in Plasma Sheet - PIC Simulation Open
Understanding lunar surface charging mechanisms is pivotal for unravelling the complexities of the lunar environment. This research utilizes particle-in-cell (PIC) code simulations to investigate the breakdown of plasma sheet quasi-neutral…
View article: Energy mapping of Jupiter’s auroral electrons from Juno/UVS data using a new H<sub>2</sub> UV emission model
Energy mapping of Jupiter’s auroral electrons from Juno/UVS data using a new H<sub>2</sub> UV emission model Open
Context . Juno, which studies the Jovian system, continues to expand our knowledge of Jupiter’s magnetosphere and its environment. Thanks to onboard instruments such as Jupiter Energetic Particle Detector Instrument (JEDI) and Jovian Auror…
View article: Characterization of Radiation Exposure at Aviation Flight Altitudes Using the Nowcast of Aerospace Ionizing Radiation System (NAIRAS)
Characterization of Radiation Exposure at Aviation Flight Altitudes Using the Nowcast of Aerospace Ionizing Radiation System (NAIRAS) Open
Exposure to ionizing radiation from galactic cosmic rays (GCR) and solar energetic particles (SEP) at aircraft flight altitudes can have an adverse effect on human health. Although airline crews are classified as radiation workers by the I…
View article: Evaluating WRF-GC v2.0 predictions of boundary layer height and vertical ozone profile during the 2021 TRACER-AQ campaign in Houston, Texas
Evaluating WRF-GC v2.0 predictions of boundary layer height and vertical ozone profile during the 2021 TRACER-AQ campaign in Houston, Texas Open
The TRacking Aerosol Convection ExpeRiment – Air Quality (TRACER-AQ) campaign probed Houston air quality with a comprehensive suite of ground-based and airborne remote sensing measurements during the intensive operating period in September…
View article: Advancing Our Understanding of Martian Proton Aurora Through a Coordinated Multi‐Model Comparison Campaign
Advancing Our Understanding of Martian Proton Aurora Through a Coordinated Multi‐Model Comparison Campaign Open
Proton aurora are the most commonly observed yet least studied type of aurora at Mars. In order to better understand the physics and driving processes of Martian proton aurora, we undertake a multi‐model comparison campaign. We compare res…
View article: TOLNet validation of satellite ozone profiles in the troposphere: impact of retrieval wavelengths
TOLNet validation of satellite ozone profiles in the troposphere: impact of retrieval wavelengths Open
The Tropospheric Ozone Lidar Network (TOLNet) was applied to validate retrievals of ozone (O3) profiles in the troposphere from the TROPOspheric Monitoring Instrument (TROPOMI) ultraviolet (UV), Cross-track Infrared Sounder (CrIS) infrared…
View article: Supplementary material to "TOLNet validation of satellite ozone profiles in the troposphere: impact of retrieval wavelengths"
Supplementary material to "TOLNet validation of satellite ozone profiles in the troposphere: impact of retrieval wavelengths" Open
Normalized mean biases (NMB, in ppb) were calculated with Eq. (S1) = ∑ ( - ) =1 ∑ =1 convolved with the TROPOMI AK (TOLNet-AK), UV, IR, and UV+IR TOPAS satellite retrievals, and the a priori profile information used in the TOPAS retrieval …
View article: A Survey of Strong Electric Potential Drops in the Ionosphere of Venus
A Survey of Strong Electric Potential Drops in the Ionosphere of Venus Open
Every planet or moon with an ionosphere is thought to generate a weak electrical potential which helps ions overcome gravity and escape to space. A pilot study at Venus by Collinson et al. (2016, https://doi.org/10.1002/2016GL068327 ) indi…
View article: The Sun-Earth-Moon Connection: II--Solar Wind and Lunar Surface Interaction
The Sun-Earth-Moon Connection: II--Solar Wind and Lunar Surface Interaction Open
In the pursuit of lunar exploration and the investigation of water presence on the lunar surface, a comprehensive understanding of plasma-surface interactions is crucial since the regolith's space weathering can create H$_2$O. However, the…
View article: The Sun-Earth-Moon Connection: I--3D Global Kinetic Simulation
The Sun-Earth-Moon Connection: I--3D Global Kinetic Simulation Open
The complex interplay between the Solar Wind and the lunar surface serves as a quintessential example of space weathering. However, uncertainties persist regarding the influence of plasma originating from Earth's ionosphere, necessitating …
View article: Spatial Heterodyne Spectroscopy: A Powerful Technique for Remotely Measuring the State of Plasmas from the Solar Atmosphere to Geospace to Heliopause
Spatial Heterodyne Spectroscopy: A Powerful Technique for Remotely Measuring the State of Plasmas from the Solar Atmosphere to Geospace to Heliopause Open
Whitepaper #173 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research. Additional topics: solar physics; space-based missions/projects; system science.
View article: Expanding Heliophysics to Engage in Interdisciplinary Star-Planet Interactions Studies
Expanding Heliophysics to Engage in Interdisciplinary Star-Planet Interactions Studies Open
Traditionally, heliophysics is characterized as the study of the near-Earth space environment, where plasmas and neutral gases originating from the Earth and the Sun, and to a lesser extent other solar system bodies, interact in ways that …
View article: Advancing Our Understanding of Martian Proton Aurora through a Coordinated Multi-Model Comparison Campaign
Advancing Our Understanding of Martian Proton Aurora through a Coordinated Multi-Model Comparison Campaign Open
Proton aurora are the most commonly observed yet least studied type of aurora at Mars. In order to better understand the physics and driving processes of Martian proton aurora, we undertake a multi-model comparison campaign. We compare res…
View article: Comment on egusphere-2023-892
Comment on egusphere-2023-892 Open
Abstract. The Tracking Aerosol Convection Experiment Air Quality (TRACER-AQ) campaign probed Houston air quality with a comprehensive suite of ground-based and airborne remote sensing measurements during the intensive operating period in S…
View article: Comment on egusphere-2023-892
Comment on egusphere-2023-892 Open
Abstract. The Tracking Aerosol Convection Experiment Air Quality (TRACER-AQ) campaign probed Houston air quality with a comprehensive suite of ground-based and airborne remote sensing measurements during the intensive operating period in S…
View article: Evaluating WRF-GC v2.0 predictions of boundary layer and vertical ozone profiles during the 2021 TRACER-AQ campaign in Houston, Texas
Evaluating WRF-GC v2.0 predictions of boundary layer and vertical ozone profiles during the 2021 TRACER-AQ campaign in Houston, Texas Open
The Tracking Aerosol Convection Experiment Air Quality (TRACER-AQ) campaign probed Houston air quality with a comprehensive suite of ground-based and airborne remote sensing measurements during the intensive operating period in September 2…
View article: NAIRAS Model Run‐On‐Request Service at CCMC
NAIRAS Model Run‐On‐Request Service at CCMC Open
The Nowcast of Aerospace Ionizing RAdiation System (NAIRAS) version 3 model is available to the community through the Community Coordinated Modeling Center run‐on‐request (RoR) service. The RoR capability allows the user to run the NAIRAS …
View article: Identification of the roles of urban plume and local chemical production in ozone episodes observed in Long Island Sound during LISTOS 2018: Implications for ozone control strategies
Identification of the roles of urban plume and local chemical production in ozone episodes observed in Long Island Sound during LISTOS 2018: Implications for ozone control strategies Open
Long Island Sound (LIS) frequently experiences ozone (O3) exceedance events that surpass national ambient air quality standards (NAAQS) due to complex driving factors. The underlying mechanisms governing summertime O3 pollution are investi…
View article: Star-exoplanet interactions: A growing interdisciplinary field in heliophysics
Star-exoplanet interactions: A growing interdisciplinary field in heliophysics Open
Traditionally, heliophysics is characterized as the study of the near-Earth space environment, where plasmas and neutral gases originating from the Earth, the Sun, and other solar system bodies interact in ways that are detectable only thr…