Results 31 to 40 of about 1,771,886 (128)

Four-dimensional variational data assimilation for inverse modelling of atmospheric methane emissions: method and comparison with synthesis inversion [PDF]

, 2008
A four-dimensional variational (4D-Var) data assimilation system for inverse modelling of atmospheric methane emissions is presented. The system is based on the TM5 atmospheric transport model.
Bergamaschi, P., M. C. Krol, P. Bergamaschi, J. F. Meirink, Krol, M.C., Dep Natuurkunde, Meirink, J., Marine and Atmospheric Research, Meirink, J.F., Krol, M. C., Meirink, J. F.   +10 more
core   +3 more sources

Exoplanet Atmospheres [PDF]

, 2010
At the dawn of the first discovery of exoplanets orbiting Sun-like stars in the mid-1990s, few believed that observations of exoplanet atmospheres would ever be possible.
Sara Seager, Deming, Drake, Drake Deming, Seager, Sara   +3 more
core   +1 more source

Helium Escape in Context: Comparative Signatures of Four Close-in Exoplanets

The Astrophysical Journal
Observations of escaping atmospheres on close-in exoplanets show a wide range in the strength and morphology of He I 10830 Å and H I absorption. Scaling relations attempt to link the He I signal to X-ray and UV irradiation, mass loss, and bulk planetary ...
Anna Ruth Taylor, Tommi T. Koskinen, Chenliang Huang, Anthony Arfaux, Panayotis Lavvas   +4 more
doaj   +1 more source

Studying the variability of the He triplet to understand the detection limits of evaporating exoplanet atmospheres

Astronomy & Astrophysics
With more than a dozen significant detections, the helium triplet has emerged as a key tracer of evaporating exoplanet atmospheres. This near-infrared feature can be observed from the ground and holds great promise, especially with upcoming observations provided by new-generation instruments such as the Near Infrared Planet Searcher (NIRPS).
Mercier, Samson Jules, Dumusque, Xavier, Bourrier, Vincent, Al Moulla, Khaled Sleiman, Cretignier, Michaël, Dethier, William, Lo Curto, Gaspare, Figueira, Pedro Ricardo, Lovis, Christophe, Pepe, Francesco Alfonso, Santos, Nuno C., Udry, Stéphane, Wildi, François, Allart, Romain, Baron, Frédérique, Bouchy, François, Carmona, Andres, Cointepas, Marion, Doyon, René, Frensch, Yolanda Gerardina Cécile, Grieves, Nolan, Mignon, Lucile, Nielsen, Louise Dyregaard   +22 more
openaire   +3 more sources

Continuous measurements of atmospheric oxygen and carbon dioxide on a North Sea gas platform [PDF]

, 2010
A new atmospheric measurement station has been established on the North Sea oil and gas production platform F3, 200 km north off the Dutch coast (54°51' N, 4°44' E).
Neubert, R.E.M.,, S. van der Laan, Meijer, H. A. J., R. E. M. Neubert, Laan-Luijkx, I.T., van der, Laan, S., van der, Laan-Luijkx, I.T. van der, Laan, S. van der, van der Laan, S., I. T. van der Laan-Luijkx, H. A. J. Meijer, van der Laan-Luijkx, I.T., Laan-Luijkx, I.T. van der,, Meijer, H.A.J., Laan, S. van der,, Meijer, H.A.J.,, van der Laan-Luijkx, I. T., Meijer, H.A.J.; id_orcid, Neubert, R.E.M., Neubert, R. E. M.   +19 more
core   +3 more sources

A Panchromatic Characterization of the Evening and Morning Atmosphere of WASP-107 b: Composition and Cloud Variations, and Insight into the Effect of Stellar Contamination

The Astronomical Journal
Limb-resolved transmission spectroscopy has the potential to transform our understanding of exoplanetary atmospheres. By separately measuring the transmission spectra of the evening and morning limbs, these atmospheric regions can be individually ...
Matthew M. Murphy, Thomas G. Beatty, Everett Schlawin, Taylor J. Bell, Michael Radica, Thomas D. Kennedy, Nishil Mehta, Luis Welbanks, Michael R. Line, Vivien Parmentier, Thomas P. Greene, Sagnick Mukherjee, Jonathan J. Fortney, Kazumasa Ohno, Lindsey Wiser, Anastasia Triantafillides, Emily Rauscher, Isaac R. Edelman, Marcia J. Rieke   +18 more
doaj   +1 more source

Effect of Laboratory Reagents for Cleaning Modern Contamination on the δ15N Integrity of Nitrogen‐Poor Samples

Rapid Communications in Mass Spectrometry, Volume 40, Issue 19, 15 October 2026.
ABSTRACT Rationale Nitrogen isotope values have been widely used for tracing ancient biogeochemical processes, but contaminant‐sensitive materials, such as Precambrian sedimentary rocks, meteorites, or returned extraterrestrial samples, often have low nitrogen levels and are thus vulnerable to modern organic contamination.
Kunmanee Bubphamanee, Andrew Schauer, Roger Buick   +2 more
wiley   +1 more source

Interannual variability in methane growth rate simulated with a coupled Ocean-Atmosphere-Chemistry model [PDF]

, 2002
We assess the contribution made to the interannual variability of the global methane accumulation rate from its atmospheric sink using the STOCHEM tropospheric chemistry model coupled to the HadCM3 climate model.
Collins, W. J., Stevenson, D. S.; id_orcid, Derwent, R. G., Johnson, C. E.   +3 more
core   +1 more source

Wind-AE: A Fast, Open-source 1D Photoevaporation Code with Metal and Multifrequency X-Ray Capabilities

The Astrophysical Journal
Throughout their lives, short-period exoplanets (
Madelyn I. Broome, Ruth Murray-Clay, John R. McCann, James E. Owen   +3 more
doaj   +1 more source

A Solar Analog Model for Decrease in Far Ultraviolet Irradiance Under a Grand Minimum

Earth and Space Science, Volume 13, Issue 9, September 2026.
Abstract Solar analog field stars having a range of magnetic activity can provide an estimate of solar spectral irradiance (SSI) variability relevant to understanding the Sun's influence on terrestrial climate. This approach is particularly useful for far ultraviolet (FUV) irradiance that cannot be observed from the Earth surface.
D. Lubin, C. Melis, D. Tytler
wiley   +1 more source