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Trace Gas - Astrophysics Data System

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Last Updated: 09 September 2022

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ExoMars Trace Gas Orbiter - science highlights

The ExoMars Trace Gas Orbiter has now two complete Martian years of observations. Water transport from Mars is a critical step in the removal of water from Mars, with more detail on the transport of water to high altitudes. For surprisingly high subsurface water ice in low latitude areas, including one in central Valles Marineris; and continued acquisition of 5 m color imagery and digital elevation models over a wide variety of terrain and target types, including landing site characterization.

Source link: https://ui.adsabs.harvard.edu/abs/2022cosp...44..360W/abstract


Mars airglow observations from the Trace Gas Orbiter and MAVEN

The UVIS channel of the NOMAD spectrometer on board the ExoMars Trace Gas Orbiter covers the spectral range 200-650 nm at a spectral resolution of between 1. 2 and 1. 6 nm. Two pointing modes have been used: the spectrometer scans the atmosphere twice down to near the surface and provides altitude profiles of the dayglow; in the tracking mode, the atmosphere is scanned at varying latitudes at a nearly constant altitude at a nearly constant altitude. Both the brightness and altitude of the green line emission appear to seasons, according to a statistical review of the vertical and seasonal distribution of the oxygen green and red lines at 557. 7 nm and 630 nm. As the Sun-Mars distance decreases, the peak altitude of the green line emission rises seasonally. The MUV UVIS spectra will be compared to Mariner and MAVEN/IUVS leg analysis, as well as the UVIS visible portion of the MVIS spectra.

Source link: https://ui.adsabs.harvard.edu/abs/2022cosp...44..930G/abstract


Possible influence the composition of the Martian surface on visibility the spectral features of atmospheric trace gases in the Mid-infrared spectra - the results of numerical simulations

Trace gases, a key component of planetary atmospheres, react with other elements of the planets' and the surface's surface and atmosphere, resulting in new atmospheres and atmospheres. By the influence of the surface, the ground optical results are distorted by the influence of the atmosphere and vice versa when examining the atmosphere. Is it likely that the surface spectral spectrum would completely mask the characteristics of atmospheric trace gases? The impact of spectral characteristics of the surface on intensity and profiles of Martian spectra in the spectral region of absorption bands of methane was carefully examined in the paper. Methane has yet to be detected in the Martian atmosphere, according to the fact that ExoMars Trace Gas Orbiter's excellent NOMAD spectrometer, which was part of the ExoMars Trace Gas Orbiter's payload, had not yet detected methane in the Martian atmosphere. In the Mid-Infrared spectral range, the elaborated codes provide estimates of the spectral reflectance/emittance, and the total radiance of the Martian surface and atmosphere in the Mid-Infrared spectral range. Methane appears over mineralogical surfaces, which may be the source of this gas. One of the many examples discussed is the finding of methane over these granular surfaces, which could be one of the gas's source. SRC - PAS researchers are involved in the study. The paper is based on stereoscopic camera CASSiS results of an ExoMars Trace Gas Orbiter of the ESA mission, which includes researchers from SRC - PAS. para. g. The Cassis camera gives us the ability to investigate the structure, color, and locations on Mars' surface of potential trace gases e. g. trace gases.

Source link: https://ui.adsabs.harvard.edu/abs/2022cosp...44..396B/abstract


The Martian environment observed by NOMAD on ExoMars Trace Gas Orbiter

The NOMAD spectrometer suite on board ExoMars Trace Gas Orbiter has been designed to investigate Mars' atmosphere's composition, with a particular emphasis on trace gases, clouds, and dust. With three spectral channels [1,2], a solar occultation channel capable of nadir, solar occultation, and leg sounding, as well as ultraviolet/visible channel, the instrument investigates large portions of the 0. 2-2. 6 million spectral range [1,2], as well as ultraviolet/visible channel [1,2]. Since arriving on Mars in April 2018, NOMAD carried out solar occultation, nadir, and leg measurements dedicated to the determination of the atmosphere's composition and structure. NOMAD has been collecting data about the Martian atmosphere and its surface for two complete Martian years. We will feature some findings regarding the atmosphere composition, including clouds and dust, in particular, we will have climatologies of water [3], D/H[4], temperature[6], ozone[6], and dust.

Source link: https://ui.adsabs.harvard.edu/abs/2022cosp...44..370E/abstract


Air quality impacts of COVID-19 lockdown measures detected from space using high spatial resolution observations of multiple trace gases from Sentinel-5P/TROPOMI

From regional to city scales around the world, this paper will discuss how trace gas measurements from TROPOspheric Monitoring Instrument trace gas results can be used and analysed to determine event-based impacts on air quality. On both continents, we see significant declines in TROPOMI NO 2 column amounts attributed to COVID-19-related decreases. Increases in column amounts of tropospheric NO 2 range from 14 percent to 63 percent are typical for megacities. Using the SO 2 results, we were able to determine industry-specific emission shifts in China and India, where the primary source of anthropogenic SO 2 is coal-fired power generation, is NO 2 observations. In the future, the combination of inverse modeling methods with high spatial resolution data from S5P/TROPOMI for all observed trace gases presented here will result in a significantly improved sector-specific, space-based analysis of the effects of COVID-19 lockdown measures relative to other existing satellite observations.

Source link: https://ui.adsabs.harvard.edu/abs/2022ACP....2210319L/abstract


Successful Derivation of Absorbing Aerosol Index from the Environmental Trace Gases Monitoring Instrument (EMI)

For the first time, we obtained the absorption aerosol index based on the Environmental Trace Gas Monitoring Instrument's measured reflectance. The EMI initial AAI results were adjusted from physical stripes to yield a reduction of 5. 92 as calibration errors from a background value based on the statistical method that measures the EMI AAI over the Pacific Ocean under cloudless scenes. A comparison between the monthly average EMI AAI results and TROPOMI AAI showed regional consistency between these two programs with a similar spatial distribution of AAI.

Source link: https://ui.adsabs.harvard.edu/abs/2022RemS...14.4105T/abstract


Application of the tracer gas technology to investigate convective radon transport processes between mine workings and houses

The convective radon transport through the disturbed bedrock is a common source of elevated radon concentrations in dwellings in areas that feature air-filled mine workings. The use of tracer gases that can be detected by gas chromatography in extremely low amounts allows for the rapid detection of mine-originated radon in dwellings and provides insight into the complexities of radon transport.

Source link: https://ui.adsabs.harvard.edu/abs/2012Kernt..77..187L/abstract

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions