Results 21 to 30 of about 11,807 (143)

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

Measurement report: Comprehensive seasonal study of the composition and sources of submicron aerosol during the JULIAC campaign in Germany [PDF]

Atmospheric Chemistry and Physics
The seasonal variations of aerosol sources and their atmospheric evolution are investigated using observations from the year-long JULIAC (Jülich Atmospheric Chemistry Project) campaign (January–November 2019) in Jülich, Germany.
L. Liu, L. Liu, T. Hohaus, A. Hofzumahaus, F. Holland, H. Fuchs, H. Fuchs, R. Tillmann, B. Bohn, S. Andres, Z. Tan, Z. Tan, F. Rohrer, V. A. Karydis, V. Vardhan, V. Vardhan, P. Franke, A. C. Lange, A. Novelli, B. Winter, C. Cho, C. Cho, I. Gensch, S. Wedel, A. Wahner, A. Kiendler-Scharr   +25 more
doaj   +1 more source

Recognition of spatial distribution of convergence fluctuation of VIMFC vertical cumulative moisture on Iran’s atmosphere during 1979-2013 [PDF]

تحقیقات کاربردی علوم جغرافیایی, 2021
The aim of this study is to identify the spatial distribution of Vertically Integrated Moisture Flux Convergence (Vertically Integrated) Moisture Flux Convergence) on Iran’s atmosphere.
Farshad Pazhoh, , mehry akbary, Mohammad Darand   +3 more
doaj  

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

The vertical profile of recent tropical temperature trends: Persistent model biases in the context of internal variability

Environmental Research Letters, 2020
Tropospheric and stratospheric tropical temperature trends in recent decades have been notoriously hard to simulate using climate models, particularly in the upper troposphere.
Dann M Mitchell, Y T Eunice Lo, William J M Seviour, Leopold Haimberger, Lorenzo M Polvani   +4 more
doaj   +1 more source

The tropospheric scintillation prediction of earth-to-satellite link for Bangladeshi climatic condition [PDF]

Serbian Journal of Electrical Engineering, 2015
The performance of earth-to-satellite link largely depends on various environmental factors like rain, fog, cloud, and atmospheric effects like ionospheric and tropospheric scintillation.
Hossain Muhammad Sakir, Samad Muhammad Abdus   +1 more
doaj   +1 more source

The potential of drone observations to improve air quality predictions by 4D-Var [PDF]

Atmospheric Chemistry and Physics
Vertical profiles of atmospheric pollutants, acquired by uncrewed aerial vehicles (UAVs, known as drones), represent a new type of observation that can help to fill the existing observation gap in the planetary boundary layer (PBL). This article presents
H. Erraji, P. Franke, A. Lampert, T. Schuldt, R. Tillmann, A. Wahner, A. C. Lange   +6 more
doaj   +1 more source

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

Observational evidence reveals the significance of nocturnal chemistry in seasonal secondary organic aerosol formation

npj Climate and Atmospheric Science
Oxidized Organic Aerosol (OOA), a major component of fine atmospheric particles, impacts climate and human health. Previous experiments and atmospheric models emphasize the importance of nocturnal OOA formation from NO3· oxidation of biogenic VOCs.
Lu Liu, Thorsten Hohaus, Philipp Franke, Anne C. Lange, Ralf Tillmann, Hendrik Fuchs, Zhaofeng Tan, Franz Rohrer, Vlassis Karydis, Quanfu He, Vaishali Vardhan, Stefanie Andres, Birger Bohn, Frank Holland, Benjamin Winter, Sergej Wedel, Anna Novelli, Andreas Hofzumahaus, Andreas Wahner, Astrid Kiendler-Scharr   +19 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