Atmospheric composition
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Sea Spray Aerosol: The Chemical Link between the Oceans, Atmosphere, and Climate Open
The oceans, atmosphere, and clouds are all interconnected through the release and deposition of chemical species, which provide critical feedback in controlling the composition of our atmosphere and climate. To better understand the coupli…
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Interpreting the atmospheric composition of exoplanets: sensitivity to planet formation assumptions Open
Constraining planet formation based on the atmospheric composition of exoplanets is a fundamental goal of the exoplanet community. Existing studies commonly try to constrain atmospheric abundances, or to analyze what abundance patterns a g…
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Three’s Company: An Additional Non-transiting Super-Earth in the Bright HD 3167 System, and Masses for All Three Planets Open
HD 3167 is a bright ( V = 8.9), nearby K0 star observed by the NASA K2 mission (EPIC 220383386), hosting two small, short-period transiting planets. Here we present the results of a multi-site, multi-instrument radial-velocity campaign to …
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ATom: Merged Atmospheric Chemistry, Trace Gases, and Aerosols, Version 2 Open
This dataset provides information on greenhouse gases and human-produced air pollution, including atmospheric concentrations of carbon dioxide (CO2), methane (CH4), tropospheric ozone (O3), and black carbon (BC) aerosols, collected during …
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The Composition and Chemistry of Titan’s Atmosphere Open
In this review I summarize the current state of knowledge about the composition of Titan's atmosphere and our current understanding of the suggested chemistry that leads to that observed composition. I begin with our present knowledge of t…
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Methods to homogenize electrochemical concentration cell (ECC) ozonesonde measurements across changes in sensing solution concentration or ozonesonde manufacturer Open
Ozone plays a significant role in the chemical and radiative state of the atmosphere. For this reason there are many instruments used to measure ozone from the ground, from space, and from balloons. Balloon-borne electrochemical cell ozone…
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The effect of meteorological conditions and atmospheric composition in the occurrence and development of new particle formation (NPF) events in Europe Open
Although new particle formation (NPF) events have been studied extensively for some decades, the mechanisms that drive their occurrence and development are yet to be fully elucidated. Laboratory studies have done much to elucidate the mole…
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An improved microcarb dispersive instrumental concept for the measurement of greenhouse gases concentration in the atmosphere Open
The MicroCarb mission objective is to better understand the carbon cycle and predict its evolution. For that purpose MicroCarb is designed to measure the carbon dioxide (CO2) mixing ratio column within 1 ppm (a measurement precision of ~0.…
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The composition of hot Jupiter atmospheres assembled within chemically evolved protoplanetary discs Open
The radial-dependent positions of snowlines of abundant oxygen- and carbon-bearing molecules in protoplanetary discs will result in systematic radial variations in the carbon-to-oxygen (C/O) ratios in the gas and ice. This variation is pro…
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Air Pollution in New Delhi during Late Winter: An Overview of a Group of Campaign Studies Focusing on Composition and Sources Open
In recent times, a significant number of studies on the composition and sources of fine particulate matters and volatile organic compounds have been carried out over Delhi, either initiated by or in association with the researchers from th…
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Seasonal Variation of Thermospheric Composition Observed by NASA GOLD Open
We examine characteristics of the seasonal variation of thermospheric composition using column number density ratio ∑ O/N 2 observed by the NASA Global Observations of Limb and Disk (GOLD) mission from low‐mid to mid‐high latitudes. We als…
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Evaluation of the CAMS global atmospheric trace gas reanalysis 2003–2016 using aircraft campaign observations Open
The Copernicus Atmosphere Monitoring Service (CAMS) operated by the European Centre for Medium-Range Weather Forecasts (ECMWF) has produced a global reanalysis of aerosol and reactive gases (called CAMSRA) for the period 2003–2016. Space o…
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Source attribution using FLEXPART and carbon monoxide emission inventories: SOFT-IO version 1.0 Open
Since 1994, the In-service Aircraft for a Global Observing System (IAGOS) program has produced in situ measurements of the atmospheric composition during more than 51 000 commercial flights. In order to help analyze these observations and …
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Ground-based vertical profile observations of atmospheric composition on the Tibetan Plateau (2017–2019) Open
The Tibetan Plateau (TP) plays an essential role in modulating regional and global climate, and its influence on climate is also affected by human-related processes, including changes in atmospheric composition. However, observations of at…
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Atmospheric History of H<sub>2</sub> Over the Past Century Reconstructed From South Pole Firn Air Open
Molecular hydrogen (H 2 ) is an abundant and reactive constituent of Earth's atmosphere, with links to climate and air quality. Anthropogenic emissions of H 2 are expected to rise as the use of H 2 as an energy source increases. Documentin…
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Molecular insights into the composition, sources, and aging of atmospheric brown carbon Open
The light-absorbing chemical components of atmospheric organic aerosols are commonly referred to as Brown Carbon (BrC), reflecting the characteristic yellowish to brown appearance of aerosol.
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Open questions on the chemical composition of airborne particles Open
Airborne particles have significant impacts on health, visibility, and climate. Here, an overview of what is known about particle chemical composition is presented, along with open questions and challenges that are central to relating comp…
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A Catalog of Exoplanet Atmospheric Retrieval Codes Open
Exoplanet atmospheric retrieval is a computational technique widely used to infer properties of planetary atmospheres from remote spectroscopic observations. Retrieval codes typically employ Bayesian sampling algorithms or machine learning…
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SMILES-2 Mission for Temperature, Wind, and Composition in the Whole Atmosphere Open
The Superconducting Submillimeter-Wave Limb-Emission Sounder 2 (SMILES-2) is a satellite mission that will be proposed to the Japan Aerospace Exploration Agency (JAXA) for a launch after 2023. It will scan the atmospheric limb from the low…
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Atmospheric Chemistry of Secondary and Hybrid Atmospheres of Super Earths and Sub-Neptunes Open
The atmospheres of small exoplanets likely derive from a combination of geochemical outgassing and primordial gases left over from formation. Secondary atmospheres, such as those of Earth, Mars, and Venus, are sourced by outgassing. Persis…
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Machine Learning Uncovers Aerosol Size Information From Chemistry and Meteorology to Quantify Potential Cloud‐Forming Particles Open
Cloud condensation nuclei (CCN) are mediators of aerosol‐cloud interactions, which contribute to the largest uncertainty in climate change prediction. Here, we present a machine learning (ML)/artificial intelligence (AI) model that quantif…
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Noble gases and nitrogen in Tissint reveal the composition of the Mars atmosphere Open
Comparative planetology is crucial to unravel the origin and evolution of volatile elements on terrestrial planets.We report precise measurements of the elemental and isotopic composition of nitrogen and noble gases in the Martian meteorit…
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Implications of future atmospheric composition in decision-making for sustainable aviation Open
Aviation emissions lead to degraded air quality and adverse human health impacts, making air quality one of the leading environmental externalities associated with aviation. Aviation emissions have been growing steadily over the past decad…
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Impacts of a near-future supersonic aircraft fleet on atmospheric composition and climate Open
Sulfur aerosols and soot from supersonic aircraft may cause greater climate impacts than the emitted CO 2 . Both fuel composition and cruise altitude must be considered when evaluating the effects of supersonic aircraft on climate and the …
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Advance in the remote sensing of atmospheric aerosol composition Open
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Bayesian Deep Learning for Exoplanet Atmospheric Retrieval Open
Over the past decade, the study of extrasolar planets has evolved rapidly from plain detection and identification to comprehensive categorization and characterization of exoplanet systems and their atmospheres. Atmospheric retrieval, the i…
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Alfnoor: Assessing the Information Content of Ariel's Low-resolution Spectra with Planetary Population Studies Open
The Ariel Space Telescope will provide a large and diverse sample of exoplanet spectra, performing spectroscopic observations of about 1000 exoplanets in the wavelength range 0.5–7.8 μ m. In this paper, we investigate the information conte…
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Why the day is 24 hours long: The history of Earth’s atmospheric thermal tide, composition, and mean temperature Open
The Sun drives a semidiurnal (12-hour) thermal tide in Earth’s atmosphere. Zahnle and Walker suggested that an atmospheric oscillation with period P res ≈ 10.5 hours resonated with the Solar driving ≈600 million years ago (Ma), when the le…
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BOWIE-ALIGN: how formation and migration histories of giant planets impact atmospheric compositions Open
Hot Jupiters present a unique opportunity for measuring how planet formation history shapes present-day atmospheric composition. However, due to the myriad pathways influencing composition, a well-constructed sample of planets is needed to…
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Studies of the global carbon cycle using atmospheric oxygen and associated tracers Open
This thesis presents research into the global carbon cycle using measurements of atmospheric composition made at the Commonwealth Scientific and Industrial Research Organisation's (CSIRO) Global Atmospheric Sampling LABoratory (GASLAB). Th…