Results 41 to 50 of about 12,264 (254)

Residuals of Tropospheric Delays from GNSS Data and Ray-Tracing as a Potential Indicator of Rain and Clouds

Remote Sensing, 2018
The Global Navigation Satellite System (GNSS) is commonly recognized by its all-weather capability. However, observations depend on atmospheric conditions which requires the induced tropospheric delay to be estimated as an unknown parameter.
Paweł Hordyniec, Jan Kapłon, Witold Rohm, Maciej Kryza   +3 more
doaj   +1 more source

Evaluation of OH and HO₂ concentrations and their budgets during photooxidation of 2-methyl-3-butene-2-ol (MBO) in the atmospheric simulation chamber SAPHIR [PDF]

Atmospheric Chemistry and Physics, 2018
Several previous field studies have reported unexpectedly large concentrations of hydroxyl and hydroperoxyl radicals (OH and HO2, respectively) in forested environments that could not be explained by the traditional oxidation mechanisms that largely ...
A. Novelli, M. Kaminski, M. Kaminski, M. Rolletter, I.-H. Acir, I.-H. Acir, B. Bohn, H.-P. Dorn, X. Li, X. Li, A. Lutz, S. Nehr, S. Nehr, F. Rohrer, R. Tillmann, R. Wegener, F. Holland, A. Hofzumahaus, A. Kiendler-Scharr, A. Wahner, H. Fuchs   +20 more
doaj   +1 more source

Climatology of Tropical Cyclones Approaching Tanzania and Their Impacts on Rainfall in East Africa

International Journal of Climatology, EarlyView.
Tropical cyclones (TCs) that approach Tanzania bring heavy rainfall over northern Mozambique, Tanzania, and south‐central Kenya, but the occurrence of these TCs reduces precipitation over southern African countries. Easterly steering winds and the Mascarene High are key features directing TCs westward.
Michinori Ideyoshi, Youichi Kamae
wiley   +1 more source

Investigation of the oxidation of methyl vinyl ketone (MVK) by OH radicals in the atmospheric simulation chamber SAPHIR [PDF]

Atmospheric Chemistry and Physics, 2018
The photooxidation of methyl vinyl ketone (MVK) was investigated in the atmospheric simulation chamber SAPHIR for conditions at which organic peroxy radicals (RO2) mainly reacted with NO (high NO case) and for conditions at which other reaction ...
H. Fuchs, S. Albrecht, I. Acir, I. Acir, B. Bohn, M. Breitenlechner, H.-P. Dorn, G. I. Gkatzelis, A. Hofzumahaus, F. Holland, M. Kaminski, M. Kaminski, F. N. Keutsch, A. Novelli, D. Reimer, F. Rohrer, R. Tillmann, L. Vereecken, R. Wegener, A. Zaytsev, A. Kiendler-Scharr, A. Wahner   +21 more
doaj   +1 more source

Atmospheric Chemistry of CF3C(Cl)═CH2 (HCFO‐1233xf)

International Journal of Chemical Kinetics, EarlyView.
ABSTRACT 2‐chloro‐3,3,3‐trifluoropropene, CF3C(Cl)═CH2 (HCFO‐1233xf), is a volatile hydrochlorofluoroolefin, commonly used in industrial synthesis of other halogenated olefins. Kinetics and reaction mechanisms for the reactions of OH radicals, Cl atoms, and O3 with CF3C(Cl)═CH2 were investigated using FTIR/smog chamber studies in 700 Torr of air/N2 ...
Bethanie Curiel, Connor Blair, Morten Frausig, Luisa Pennacchio, Thomas G. Minehan, Ole John Nielsen, Mads P. Sulbaek Andersen   +6 more
wiley   +1 more source

Investigation of the β-pinene photooxidation by OH in the atmosphere simulation chamber SAPHIR [PDF]

Atmospheric Chemistry and Physics, 2017
Besides isoprene, monoterpenes are the non-methane volatile organic compounds (VOCs) with the highest global emission rates. Due to their high reactivity towards OH, monoterpenes can dominate the radical chemistry of the atmosphere in forested areas ...
M. Kaminski, M. Kaminski, H. Fuchs, I.-H. Acir, I.-H. Acir, B. Bohn, T. Brauers, T. Brauers, H.-P. Dorn, R. Häseler, A. Hofzumahaus, X. Li, X. Li, A. Lutz, S. Nehr, S. Nehr, F. Rohrer, R. Tillmann, L. Vereecken, R. Wegener, A. Wahner   +20 more
doaj   +1 more source

Климатическая изменчивость стратосферно-тропосферных взаимодействий, наблюдаемая в последние десятилетия

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2021
В данной работе показано, как изменялось взаимодействие между тропосферой и стратосферой в последние десятилетия. Также оценено влияние таких явлений, как квазидвухлетнее колебание (КДК) на данное взаимодействие.
Диденко, К.А., Ермакова, Т.С., Погорельцев, А.И., Ракушина, Е.В.   +3 more
doaj   +1 more source

Reaction Rate Coefficients and Adduct Formation in the Cl Atom + (E)‐CF3CF2CH=CHCF2CF3 Reaction

International Journal of Chemical Kinetics, EarlyView.
ABSTRACT In this work, rate coefficients for the Cl‐atom + (E)‐CF3CF2CH═CHCF2CF3 (HFO‐153‐10mczz, F22E) gas‐phase reaction were measured as a function of temperature and pressure, k(243–323 K, 50–300 Torr), using a pulsed laser photolysis‐resonance fluorescence (PLP‐RF) technique.
Maria‐Areti I. Spanoudaki, Daniel Van Hoomissen, Vassileios C. Papadimitriou, James B. Burkholder   +3 more
wiley   +1 more source

MieAI: a neural network for calculating optical properties of internally mixed aerosol in atmospheric models

npj Climate and Atmospheric Science
Aerosols influence weather and climate by interacting with radiation through absorption and scattering. These effects heavily rely on the optical properties of aerosols, which are mainly governed by attributes such as morphology, size distribution, and ...
Pankaj Kumar, Heike Vogel, Julia Bruckert, Lisa Janina Muth, Gholam Ali Hoshyaripour   +4 more
doaj   +1 more source

Metrology of Nanoparticles

CHIMIA
In the past decades, several measurement techniques have been developed and continuously optimized to specifically analyze airborne nanoparticles. Nanoparticles have gained significant importance in fields such as air quality research, climate studies ...
Oliver F. Bischof, Heinz Burtscher, Martin Fierz   +2 more
doaj   +1 more source