Results 41 to 50 of about 3,727,608 (358)

The Composition of the Atmosphere [PDF]

Nature, 1914
MR. A. PARKER (Jour. Chem. Soc., April, 1914) in a study of the inflammation of mixtures of methane with oxygen and nitrogen, has found that inflammation can be brought about more easily in mixtures containing nitrogen than in pure oxygen. In fact, the mixture which requires for ignition a minimum of methane contains only about 23 per cent.
openaire   +3 more sources

Atmospheric composition change: Ecosystems–Atmosphere interactions

Atmospheric Environment, 2009
Ecosystems and the atmosphere: This review describes the state of understanding the processes involved in the exchange of trace gases and aerosols between the earth's surface and the atmosphere. The gases covered include NO, NO2, HONO, HNO3, NH3, SO2, DMS, Biogenic VOC, O-3, CH4, N2O and particles in the size range 1 nm-10 mu m including organic and ...
Albrecht Neftel, Christophe Flechard, Paul S. Monks, Michela Maione, László Horváth, S. Cieslik, Kim Pilegaard, A. Flossman, Jan Willem Erisman, Jan Duyzer, Nadine Chaumerliac, Teis Nørgaard Mikkelsen, Maria Cristina Facchini, Douglas Nilsson, Jan K. Schjoerring, Mark A. Sutton, U. Daemmgen, Martin Gallagher, Maarit Raivonen, Nuria Altimir, Jonathan Williams, Nicolas Brüggemann, Per Ambus, Elena Paoletti, Colin D. O'Dowd, Mhairi Coyle, G. de Leeuw, Ivar S. A. Isaksen, Pawel K. Misztal, John N. Cape, R. Wichink-Kruit, Benjamin Loubet, Juergen Burkhardt, Timo Vesala, Erwan Personne, David Fowler, Eiko Nemitz, Francesco Loreto, Ülo Niinemets, L. Gruenhage, Juha-Pekka Tuovinen, Ute Skiba, Sandro Fuzzi, Pierre Cellier, Giacomo Gerosa, Paul I. Palmer, David Simpson, David Simpson, Klaus Butterbach-Bahl, Paolo Laj, Paolo Laj, Claire Granier, Claire Granier, Claire Granier, Sara C. Pryor, Helge Ro-Poulsen, Christof Ammann, Sophie Zechmeister-Boltenstern, Janne Rinne, Hilde Fagerli, Johan Neirynck   +60 more
openaire   +7 more sources

Prediction of size-resolved number concentration of cloud condensation nuclei and long-term measurements of their activation characteristics

Scientific Reports, 2017
Atmospheric aerosol particles acting as cloud condensation nuclei (CCN) are key elements in the hydrological cycle and climate. To improve our understanding of the activation characteristics of CCN and to obtain accurate predictions of their ...
H. C. Che, X. Y. Zhang, L. Zhang, Y. Q. Wang, Y. M. Zhang, X. J. Shen, Q. L. Ma, J. Y. Sun, J. T. Zhong   +8 more
doaj   +1 more source

The local ship speed reduction effect on black carbon emissions measured at a remote marine station [PDF]

Atmospheric Chemistry and Physics
Speed restrictions for ships have been introduced locally to reduce the waves and turbulence causing erosion, and safety hazards, and to mitigate the air and underwater noise emissions. Ship speed restrictions could be used to minimize the climate impact
M. Heikkilä, K. Luoma, T. Mäkelä, T. Grönholm   +3 more
doaj   +1 more source

PLAM – a meteorological pollution index for air quality and its applications in fog-haze forecasts in North China [PDF]

Atmospheric Chemistry and Physics, 2016
Using surface meteorological observation and high-resolution emission data, this paper discusses the application of the PLAM/h index (Parameter Linking Air-quality to Meteorological conditions/haze) in the prediction of large-scale low visibility and ...
Y. Q. Yang, J. Z. Wang, S. L. Gong, X. Y. Zhang, H. Wang, Y. Q. Wang, J. Wang, D. Li, J. P. Guo   +8 more
doaj   +1 more source

Impact of Biomass Burning on Air Quality in Temuco City, Chile

Aerosol and Air Quality Research, 2021
Residential wood burning emits a complex mixture of particulate and gaseous compounds. In this article we show an in-depth chemical characterization of particulate matter evidencing the impact of biomass burning on the urban air quality in Greater Temuco,
Felipe Reyes, Sofía Ahumada, Francisca Rojas, Pedro Oyola, Yeanice Vásquez, Claudio Aguilera, Andres Henriquez, Ernesto Gramsch, Choong-Min Kang, Sanna Saarikoski, Kimmo Teinilä, Minna Aurela, Hilkka Timonen   +12 more
doaj   +1 more source

Atmospheric Structure and Composition

, 2009
Titan's atmosphere is predominantly N2 with CH4 the next most abundant molecule. It has a mole fraction of 0.05 just above the surface decreasing to 0.014 in the stratosphere. Above the homopause (~800–850 km), it increases to 0.12 at the exobase. The third abundant molecule is H2 with a tropospheric mole fraction of 0.001 increasing to 0.004 at ~1000 ...
Strobel, Darell, Atreya, Sushil K., Bézard, Bruno, Ferri, Francesca, Flasar, Michael, Fulchignoni, Marcello, Lellouch, Emmanuel, Müller-Wodarg, Ingo, Lebreton, Jean-Pierre, Waite, J. Hunter   +9 more
openaire   +4 more sources

A Parameterized Method for Air-Quality Diagnosis and Its Applications

Advances in Meteorology, 2012
A parameterized method is developed to diagnose the air quality in Beijing and other cities with an index termed (parameters linking air-quality to meteorological elements PLAM) derived from a correlation between PM10 and relevant weather elements based ...
J. Z. Wang, S. L. Gong, X. Y. Zhang, Y. Q. Yang, Q. Hou, C. H. Zhou, Y. Q. Wang   +6 more
doaj   +1 more source

Seasonal Variations in Atmospheric Composition as Measured in Gale Crater, Mars

Journal of Geophysical Research: Planets, 2019
The Sample Analysis at Mars (SAM) instrument onboard the Mars Science Laboratory Curiosity rover measures the chemical composition of major atmospheric species (CO2, N2, 40Ar, O2, and CO) through a dedicated atmospheric inlet. We report here measurements
M. Trainer, M. Wong, T. McConnochie, H. Franz, S. Atreya, P. Conrad, F. Lefévre, P. Mahaffy, C. Malespin, H. Manning, J. Martín‐Torres, G. Martinez, C. Mckay, R. Navarro‐González, Á. Vicente-Retortillo, C. Webster, M. Zorzano   +16 more
semanticscholar   +1 more source

A Study on Parameterization of the Beijing Winter Heavy Haze Events Associated with Height of Pollution Mixing Layer

Advances in Meteorology, 2017
North China Plain, Beijing, Tianjin, and Hebei province are the major areas facing the decreasing air quality and frequent pollution events in the recent years.
Tao Niu, Jizhi Wang, Yuanqin Yang, Yaqiang Wang, Cheng Chen   +4 more
doaj   +1 more source