Results 11 to 20 of about 539,558 (160)

Compositions of Hot Super-Earth Atmospheres: exploring Kepler Candidates [PDF]

, 2011
This paper outlines a simple approach to evaluate the atmospheric composition of hot rocky planets by assuming different types of planetary composition and using corresponding model calculations. To explore hot atmospheres above 1000 K, we model the vaporization of silicate magma and estimate the range of atmospheric compositions according to the ...
Batalha, Borucki, Burrows, Fegley, Hastie, Hastie, Hastie, Henning, Kaltenegger, Miller-Ricci, Murray, Rogers, Rowe, Rowe, Schaefer, Schaefer, Seager, Sudarsky, Valencia   +18 more
arxiv   +3 more sources

Upper atmospheres and ionospheres of planets and satellites [PDF]

, 2017
The upper atmospheres of the planets and their satellites are more directly exposed to sunlight and solar wind particles than the surface or the deeper atmospheric layers. At the altitudes where the associated energy is deposited, the atmospheres may become ionized and are referred to as ionospheres.
A Bhardwaj, A García Muñoz, A Mahieux, A Pätzold, A Seiff, A Sánchez-Lavega, A-S Wong, AJ Coates, AJ Friedson, AJ Kliore, AJ Kliore, AN Volkov, BM Jakosky, BM Jakosky, CD Parkinson, CGA Smith, CGA Smith, D Grodent, D Snowden, D Snowden, DC Catling, DL Huestis, DM Hunten, DP Hinson, E Lellouch, F González-Galindo, F Herbert, FJ Crary, GF Lindal, GF Lindal, GF Lindal, GM Keating, GMP Schubert, H Feuchtgruber, H Lammer, HB Niemann, ICF Mueller-Wodarg, ICF Müller-Wodarg, ICF Müller-Wodarg, ICF Müller-Wodarg, J Cui, J O’Donoghue, J-E Wahlund, J. M. Grebowsky, JEP Connerney, JH Waite Jr, JI Moses, JI Moses, JL Bertaux, JL Fox, JL Fox, JL Fox, K Dennerl, KI Matcheva, KL Miller, L Ben-Jaffel, LA Young, LN Fletcher, M Fulchignoni, MC Liang, MF Vogt, MH Rees, MH Stevens, N Mangold, NM Schneider, P Drossart, P Lavvas, P Lavvas, P Lavvas, P Withers, P Withers, P Withers, RJ Vervack Jr, RK Choudhary, RR Meier, RT Clancy, RT Clancy, RV Yelle, RV Yelle, RV Yelle, RV Yelle, RV Yelle, RW Schunk, S Miller, S Miller, SG Edgington, SJ Bauer, SV Badman, SW Bougher, SW Bougher, T Koskinen, T Majeed, T Majeed, TD Robinson, TE Cravens, TG Slanger, TH Zurbuchen, TJ Stubbs, TK Greathouse, TL Zhang, TT Koskinen, TT Koskinen, TT Koskinen, V Vuitton, V Vuitton, V. Vuitton, VA Krasnopolsky, W Liu, YH Kim, YH Kim   +109 more
arxiv   +3 more sources

Ranges of Atmospheric Mass and Composition of Super Earth Exoplanets [PDF]

, 2008
Terrestrial-like exoplanets may obtain atmospheres from three primary sources: Capture of nebular gases, degassing during accretion, and degassing from subsequent tectonic activity. Here we model degassing during accretion to estimate the range of atmospheric mass and composition on exoplanets ranging from 1 to 30 Earth masses. We use bulk compositions
Burbine T. H., Elkins-Tanton L. T., Jarosewich E., Linda T. Elkins‐Tanton, Morbidelli A., Sara Seager   +5 more
arxiv   +3 more sources

The atmospheric circulation of the super Earth GJ 1214b: Dependence on composition and metallicity [PDF]

, 2014
We present three-dimensional atmospheric circulation models of GJ 1214b, a 2.7 Earth-radius, 6.5 Earth-mass super Earth detected by the MEarth survey. Here we explore the planet's circulation as a function of atmospheric metallicity and atmospheric composition, modeling atmospheres with a low mean-molecular weight (i.e., H2-dominated) and a high mean ...
Fortney, Jonathan J., Freedman, Richard S., Kataria, Tiffany, Marley, Mark S., Showman, Adam P.   +4 more
arxiv   +5 more sources

Effects of marine fuel sulfur restrictions on particle number concentrations and size distributions in ship plumes in the Baltic Sea [PDF]

Atmospheric Chemistry and Physics, 2021
Exhaust emissions from shipping are a major contributor to particle concentrations in coastal and marine areas. Previously, the marine fuel sulfur content (FSC) was restricted globally to 4.5 m/m%, but the limit was changed to 3.5 m/m% at the beginning ...
S. D. Seppälä, J. Kuula, A.-P. Hyvärinen, S. Saarikoski, T. Rönkkö, J. Keskinen, J.-P. Jalkanen, H. Timonen   +7 more
doaj   +1 more source

In-depth characterization of submicron particulate matter inter-annual variations at a street canyon site in northern Europe [PDF]

Atmospheric Chemistry and Physics, 2021
Atmospheric aerosols play an important role in air pollution. Aerosol particle chemical composition is highly variable depending on the season, hour of the day, day of the week, meteorology, and location of the measurement site.
L. M. F. Barreira, A. Helin, M. Aurela, K. Teinilä, M. Friman, L. Kangas, J. V. Niemi, H. Portin, A. Kousa, L. Pirjola, T. Rönkkö, S. Saarikoski, H. Timonen   +12 more
doaj   +1 more source

Sesquiterpenes dominate monoterpenes in northern wetland emissions [PDF]

Atmospheric Chemistry and Physics, 2020
We have studied biogenic volatile organic compound (BVOC) emissions and their ambient concentrations at a sub-Arctic wetland (Lompolojänkkä, Finland), which is an open, nutrient-rich sedge fen and a part of the Pallas-Sodankylä Global Atmosphere Watch ...
H. Hellén, S. Schallhart, A. P. Praplan, T. Tykkä, M. Aurela, A. Lohila, A. Lohila, H. Hakola   +7 more
doaj   +1 more source

Characterization of volatile organic compounds and submicron organic aerosol in a traffic environment [PDF]

Atmospheric Chemistry and Physics, 2023
Urban air consists of a complex mixture of gaseous and particulate species from anthropogenic and biogenic sources that are further processed in the atmosphere.
S. Saarikoski, H. Hellén, A. P. Praplan, S. Schallhart, P. Clusius, J. V. Niemi, A. Kousa, T. Tykkä, R. Kouznetsov, M. Aurela, L. Salo, T. Rönkkö, L. M. F. Barreira, L. Pirjola, L. Pirjola, H. Timonen   +15 more
doaj   +1 more source

Undetected biogenic volatile organic compounds from Norway spruce drive total ozone reactivity measurements [PDF]

Atmospheric Chemistry and Physics, 2023
Biogenic volatile organic compounds (BVOCs) are continuously emitted from terrestrial vegetation into the atmosphere and react with various atmospheric oxidants, with ozone being an important one.
S. J. Thomas, S. J. Thomas, T. Tykkä, H. Hellén, F. Bianchi, A. P. Praplan   +5 more
doaj   +1 more source

Sensitivity analysis of the meteorological preprocessor MPP-FMI 3.0 using algorithmic differentiation [PDF]

Geoscientific Model Development, 2017
The meteorological input parameters for urban- and local-scale dispersion models can be evaluated by preprocessing meteorological observations, using a boundary-layer parameterisation model.
J. Backman, C. R. Wood, M. Auvinen, M. Auvinen, L. Kangas, H. Hannuniemi, A. Karppinen, J. Kukkonen   +7 more
doaj   +1 more source