Mars Thermospheric Variability Revealed by MAVEN EUVM Solar Occultations: Structure at Aphelion and Perihelion and Response to EUV Forcing
@article{Thiemann2018MarsTV, title={Mars Thermospheric Variability Revealed by MAVEN EUVM Solar Occultations: Structure at Aphelion and Perihelion and Response to EUV Forcing}, author={Edward Michael Benjamin Thiemann and Francis G. Eparvier and Stephen W. Bougher and Marie Dominique and Laila Andersson and Zachary Girazian and Marcin Dominik Pilinski and Brian Templeman and Bruce M. Jakosky}, journal={Journal of Geophysical Research: Planets}, year={2018}, volume={123}, pages={2248 - 2269} }
The Mars thermosphere holds clues to the evolution of the Martian climate and has practical implications for spacecraft visiting Mars, which often use it for aerobraking upon arrival, or for landers, which must pass through it. Nevertheless, it has been sparsely characterized, even when past accelerometer measurements and remote observations are taken into account. The Mars Atmosphere and Volatile EvolutioN (MAVEN) orbiter, which includes a number of instruments designed to characterize the…
23 Citations
PROBA2 LYRA Occultations: Thermospheric Temperature and Composition, Sensitivity to EUV Forcing, and Comparisons With Mars
- Physics, Environmental ScienceJournal of Geophysical Research: Space Physics
- 2021
A method for retrieving temperature and composition from 150 to 350 km in Earth's thermosphere using total number density measurements made via extreme ultraviolet (EUV) solar occultations by the…
Solar Rotation Effects in Martian Thermospheric Density as Revealed by Five Years of MAVEN Observations
- PhysicsJournal of Geophysical Research: Planets
- 2022
The quasi‐periodic 27‐day solar rotation variation in extreme ultraviolet radiation represents the most prominent source of short‐term ( < $< $ 40‐day) solar‐driven variability in Mars' thermosphere…
Thermal Structure of the Middle and Upper Atmosphere of Mars From ACS/TGO CO2 Spectroscopy
- Physics, Environmental ScienceJournal of Geophysical Research: Planets
- 2022
Temperature and density in the upper Martian atmosphere, above ∼100 km, are key diagnostic parameters to study processes of the species' escape, investigate the impact of solar activity, model the…
Mars H Escape Rates Derived From MAVEN/IUVS Lyman Alpha Brightness Measurements and Their Dependence on Model Assumptions
- PhysicsJournal of Geophysical Research: Planets
- 2018
Mars has lost a large fraction of its water to space, with the H component of this loss thought to occur mainly as a result of thermal (Jeans) escape from the upper atmosphere. Constraints on H loss…
CO2 retrievals in the Mars daylight thermosphere from its 4.3 μm limb emission measured by OMEGA/MEx
- Environmental Science, Physics
- 2021
Density structures in the martian lower thermosphere as inferred by Trace Gas Orbiter accelerometer measurements
- Physics, Environmental Science
- 2020
Martian Upper Atmosphere CO 2 Profiles as Measured by the MAVEN Spacecraft and Simulated by the MGITM 1
- Physics
On November 28, 1964, the Mariner 4 spacecraft was launched from Earth and set on a path towards Mars. It was the first successful mission dedicated solely to the exploration of the planet’s…
Seasonal and Latitudinal Variations of Dayside N2/CO2 Ratio in the Martian Thermosphere Derived From MAVEN IUVS Observations
- PhysicsJournal of Geophysical Research: Planets
- 2020
The dayside N2/CO2 at 140 km altitude in the Martian thermosphere has been investigated by the imaging ultraviolet spectrograph (IUVS) aboard the Mars atmosphere and volatile evolution spacecraft…
MAVEN SEP Observations of Scorpius X‐1 X‐Rays at Mars: A Midatmosphere Occultation Analysis Technique
- PhysicsGeophysical Research Letters
- 2020
We report on the first observations of atmospheric occultations at Mars of ~10 keV X‐rays from an extrasolar source identified as Scorpius X‐1. The measurements are taken by the SEP (Solar Energetic…
References
SHOWING 1-10 OF 90 REFERENCES
MAVEN/IUVS Stellar Occultation Measurements of Mars Atmospheric Structure and Composition
- Physics, Environmental ScienceJournal of Geophysical Research: Planets
- 2018
The Imaging UltraViolet Spectrograph (IUVS) instrument of the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission has acquired data on Mars for more than one Martian year. During this time,…
The structure and variability of Mars dayside thermosphere from MAVEN NGIMS and IUVS measurements: Seasonal and solar activity trends in scale heights and temperatures
- Physics, Environmental Science
- 2017
Mars dayside thermospheric temperature and scale height trends were examined using measurements from the Neutral Gas Ion Mass Spectrometer (NGIMS) and the Imaging Ultraviolet Spectrograph (IUVS) on…
Mars thermosphere as seen in MAVEN accelerometer data
- Physics
- 2017
The Mars thermosphere (above approximately 120 km) has been probed in situ for one Mars year using accelerometers on board the Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft. This region…
The Aeronomy of Mars: Characterization by MAVEN of the Upper Atmosphere Reservoir That Regulates Volatile Escape
- Physics, Environmental Science
- 2015
The Mars thermosphere-ionosphere-exosphere (TIE) system constitutes the atmospheric reservoir (i.e. available cold and hot planetary neutral and thermal ion species) that regulates present day escape…
Martian Thermospheric Response to an X8.2 Solar Flare on 10 September 2017 as Seen by MAVEN/IUVS
- PhysicsGeophysical Research Letters
- 2018
We report the response of the Martian upper atmosphere to a strong X‐class flare on 10 September 2017 as observed by the Imaging Ultraviolet Spectrograph (IUVS) instrument aboard the Mars Atmosphere…
Vertical Thermospheric Density Profiles From EUV Solar Occultations Made by PROBA2 LYRA for Solar Cycle 24
- Environmental Science, Physics
- 2017
A new data set of summed neutral N2 and O number density profiles, spanning altitudes between 150 and 400 km, and observed during Northern Winter from 2010 to 2016 is presented. The neutral density…
Global distribution and parameter dependences of gravity wave activity in the Martian upper thermosphere derived from MAVEN/NGIMS observations
- Physics, Environmental Science
- 2017
Wavelike perturbations in the Martian upper thermosphere observed by the Neutral Gas Ion Mass Spectrometer (NGIMS) onboard the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft have been…
The structure and variability of Mars upper atmosphere as seen in MAVEN/IUVS dayglow observations
- Physics, Environmental Science
- 2015
We report a comprehensive study of Mars dayglow observations focusing on upper atmospheric structure and seasonal variability. We analyzed 744 vertical brightness profiles comprised of ∼109,300…
Longitudinal structures in Mars' upper atmosphere as observed by MAVEN/NGIMS
- Physics, Environmental Science
- 2016
Here we report the first comprehensive study of longitudinal structures in Mars' neutral upper atmosphere associated with atmospheric tides in composition, density and temperature using the Mars…
Probing the Martian atmosphere with MAVEN/IUVS stellar occultations
- Physics, Geology
- 2015
The first campaign of stellar occultations with the Imaging Ultraviolet Spectrograph (IUVS) instrument on board of Mars Atmosphere and Volatile EvolutioN (MAVEN) mission was executed between 24 and…