Results 31 to 40 of about 49,964 (180)

Seasonal variation in nitryl chloride and its relation to gas-phase precursors during the JULIAC campaign in Germany [PDF]

Atmospheric Chemistry and Physics, 2022
Ambient measurements of nitryl chloride (ClNO2) were performed at a rural site in Germany, covering three periods in winter, summer, and autumn 2019, as part of the JULIAC campaign (Jülich Atmospheric Chemistry Project) that aimed to understand the ...
Z. Tan, H. Fuchs, H. Fuchs, A. Hofzumahaus, W. J. Bloss, B. Bohn, C. Cho, T. Hohaus, F. Holland, C. Lakshmisha, L. Liu, P. S. Monks, A. Novelli, D. Niether, F. Rohrer, R. Tillmann, T. S. E. Valkenburg, V. Vardhan, V. Vardhan, A. Kiendler-Scharr, A. Kiendler-Scharr, A. Wahner, R. Sommariva, R. Sommariva   +23 more
doaj   +1 more source

Effects of NO_x and SO₂ on the secondary organic aerosol formation from photooxidation of α-pinene and limonene [PDF]

Atmospheric Chemistry and Physics, 2018
Anthropogenic emissions such as NOx and SO2 influence the biogenic secondary organic aerosol (SOA) formation, but detailed mechanisms and effects are still elusive.
D. Zhao, S. H. Schmitt, M. Wang, M. Wang, I.-H. Acir, I.-H. Acir, R. Tillmann, Z. Tan, Z. Tan, A. Novelli, H. Fuchs, I. Pullinen, I. Pullinen, R. Wegener, F. Rohrer, J. Wildt, A. Kiendler-Scharr, A. Wahner, T. F. Mentel   +18 more
doaj   +1 more source

Stratosphere-troposphere exchange: An angular momentum perspective [PDF]

, 2007
The exchange of axial angular momentum (AM) between stratosphere and troposphere forms an important part of stratosphere–troposphere exchange (STE). Data are used to quantify the related fluxes through an idealized tropopause for specific flux events ...
Egger, Joseph, Klaus-peter Hoinka B, Joseph Egger A, Hoinka, Klaus-Peter   +3 more
core   +1 more source

Generation of Meteorological Parameters for Tropospheric Delay on GNSS Signal [PDF]

Journal of Astronomy and Space Sciences, 2008
The GNSS (Global Navigation Satellite System) signal is delayed by the neutral atmosphere at the troposphere, so that the delay is one of major error sources for GNSS precise positioning. The tropospheric delay is an integrated refractive index along the
Sung-Wook Jung, Jeongho Baek, Jung Hyun Jo, Jaewon Lee, In-Kwan Park, Sungki Cho, Jong-Uk Park   +6 more
doaj   +1 more source

Variations in Ozone Concentration over the Mid-Latitude Region Revealed by Ozonesonde Observations in Pohang, South Korea

Atmosphere, 2020
Ozone absorbs harmful UV rays at high elevations but acts as a pollutant gas in the lower atmosphere. It is necessary to monitor both the vertical profile and the total column ozone.
Daegeun Shin, Seungjoo Song, Sang-Boom Ryoo, Sang-Sam Lee   +3 more
doaj   +1 more source

CO₂ in the upper troposphere: Influence of stratosphere‐troposphere exchange [PDF]

Geophysical Research Letters, 2006
A two‐dimensional transport model constrained to measured surface CO2 concentrations was used to simulate the spatial and temporal variation of CO2 in the atmosphere for the period from 1975 to 2004. We find that the amplitude, phase and shape of the CO2 seasonal cycle vary as a function of both altitude and latitude.
Shia, Run-Lie, Liang, Mao-Chang, Miller, Charles E., Yung, Yuk L.   +3 more
openaire   +2 more sources

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

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

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

Characterizing Atmospheric Transport Pathways to Antarctica and the Remote Southern Ocean Using Radon-222

Frontiers in Earth Science, 2018
We discuss remote terrestrial influences on boundary layer air over the Southern Ocean and Antarctica, and the mechanisms by which they arise, using atmospheric radon observations as a proxy. Our primary motivation was to enhance the scientific community’
Scott D. Chambers, Susanne Preunkert, Rolf Weller, Sang-Bum Hong, Ruhi S. Humphries, Ruhi S. Humphries, Laura Tositti, Hélène Angot, Michel Legrand, Alastair G. Williams, Alan D. Griffiths, Jagoda Crawford, Jack Simmons, Taejin J. Choi, Paul B. Krummel, Suzie Molloy, Zoë Loh, Ian Galbally, Stephen Wilson, Olivier Magand, Francesca Sprovieri, Nicola Pirrone, Aurélien Dommergue   +22 more
doaj   +1 more source