Results 61 to 70 of about 49,964 (180)

Temperature-dependent rate coefficients for the reactions of OH radicals with selected alkanes, aromatic compounds, and monoterpenes [PDF]

Atmospheric Chemistry and Physics
The rate coefficients of the reaction of hydroxyl radicals (OH) with 12 different volatile organic compounds (VOCs), namely methane, ethane, propane, n-butane, methyl vinyl ketone (MVK), γ-terpinene, Δ3-carene, myrcene, toluene, o-xylene, m-xylene, and ...
F. Berg, A. Novelli, R. Dubus, A. Hofzumahaus, F. Holland, A. Wahner, H. Fuchs, H. Fuchs   +7 more
doaj   +1 more source

Hydrogen Peroxide in the Troposphere

Archives of Industrial Hygiene and Toxicology, 2007
Vodikov Peroksid U TroposferiUloga vodikova peroksida (H2O2) u atmosferskoj kemiji i njegov doprinos u nastanku slobodnih radikala počeli su se proučavati tek posljednjih nekoliko desetljeća. Fotokemijskim reakcijama s ozonom i H2O2 nastaju oksidansi (slobodni radikali) koji mogu oksidirati biomolekule unutar stanica te dovesti do smrti stanica i ...
openaire   +2 more sources

Application of fuzzy c-means clustering for analysis of chemical ionization mass spectra: insights into the gas phase chemistry of NO₃-initiated oxidation of isoprene [PDF]

Atmospheric Measurement Techniques
Oxidation of volatile organic compounds (VOCs) can lead to the formation of secondary organic aerosol (SOA), a significant component of atmospheric fine particles, which can affect air quality, human health, and climate change.
R. Wu, S. R. Zorn, S. Kang, A. Kiendler-Scharr, A. Wahner, T. F. Mentel   +5 more
doaj   +1 more source

Global perspectives on nitrate aerosol dynamics: a comprehensive sensitivity analysis [PDF]

Atmospheric Chemistry and Physics
In recent years, nitrate aerosols have become a dominant component of atmospheric composition, surpassing sulfate in both concentration and climatic impact. However, accurately simulating nitrate remains a major challenge for global models due to complex
A. Milousis, S. M. C. Scholz, H. Fuchs, H. Fuchs, A. P. Tsimpidi, V. A. Karydis   +5 more
doaj   +1 more source

Evaluation and intercomparison of global atmospheric transport models using Rn-222 and other short-lived tracers [PDF]

, 1997
Simulations of Rn-222 and other short-lived tracers are used to evaluate and intercompare the representations of convective and synoptic processes in 20 global atmospheric transport models.
Feichter, J, Chiba, M, deGrandpre, J, Zimmermann, P, Genthon, C, Chipperfield, MP, Shia, RL, Yang, H, Bergmann, DJ, Rotman, DA, Blackshear, WT, Penner, JE, Law, K, Grose, WL, Verver, G, Beagley, [No Value], Ramonet, M, Prather, MJ, Kritz, MA, Kasibhatla, PS, Kohler, J., VanVelthoven, PFJ, Reeves, CE, Balkanski, YJ, Stockwell, DZ, Wild, O, Dignon, JE, Brown, M, Jacob, DJ, Rasch, PJ   +29 more
core   +3 more sources

Kinetics of the reactions of OH with CO, NO, and NO₂ and of HO₂ with NO₂ in air at 1 atm pressure, room temperature, and tropospheric water vapour concentrations [PDF]

Atmospheric Chemistry and Physics
The termolecular reactions of hydroxyl radicals (OH) with carbon monoxide (CO), nitric oxide (NO), and nitrogen dioxides (NO2) and the termolecular reaction of hydroperoxy radicals (HO2) with NO2 greatly impact the atmospheric oxidation efficiency.
M. Rolletter, A. Hofzumahaus, A. Novelli, A. Wahner, H. Fuchs, H. Fuchs   +5 more
doaj   +1 more source

Ray Tracing and Applications to an Evaporation Duct Model Based on Data from Oceanographic Buoy Sensors

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
The two-dimensional ray tracing method allows an easy and fast modeling of tropospheric propagation in the microwave frequency range. A version of this method that determines ray trajectories, amplitudes and delays of the electromagnetic field, as well ...
Leonardo L. Freitas, Emanoel Costa
doaj   +1 more source

Impact of climate variability on tropospheric ozone [PDF]

, 2007
A simulation with the climate–chemistry model (CCM) E39/C is presented, which covers both the troposphere and stratosphere dynamics and chemistry during the period 1960 to 1999.
Grewe, Volker
core   +1 more source

Voltage scanning to calibrate Multi-Reagent Chemical Ionization Mass Spectrometers (MR-CIMS): from signal to sensitivity [PDF]

Atmospheric Measurement Techniques
Chemical ionization mass spectrometry (CIMS) offers high time-resolution measurements for diverse compounds, but atmospheric quantification remains challenging.
Y. Wang, A. Voliotis, A. Voliotis, E. Matthews, R. Wu, M. Roska, M. G. Adam, R. Dubus, L. Kesper, F. Rohrer, R. Wegener, B. Winter, K. H. Bates, Q. He, T. Hohaus, A. Grasse, R. Tillmann, A. Wahner, H. Wang, C. Wesolek, S. Wedel, Y. Wu, S. R. Zorn, M. Canagaratna, D. Worsnop, F. Lopez-Hilfiker, G. I. Gkatzelis, H. Coe, H. Coe, T. J. Bannan   +29 more
doaj   +1 more source

Climate of the free troposphere and mountain peaks [PDF]

, 2019
The free troposphere is the location of important weather and climate processes. Here, horizontal and vertical transport of energy, mass and momentum take place and it holds greenhouse gases, water vapour and clouds.
Brönnimann, Stefan, Stefan Brönnimann
core   +1 more source