Results 31 to 40 of about 168,826 (332)

The geographical distribution of meteorological parameters associated with high and low summer ozone levels in the lower troposphere and the boundary layer over the eastern Mediterranean (Cairo case) [PDF]

Tellus: Series B, Chemical and Physical Meteorology, 2015
In continuation of previous research for evaluation of the high ozone levels observed during summer time over the eastern Mediterranean, MOZAIC profiles collected at the airport of Cairo from 1994 to 2008 are analysed.
Pavlos D. Kalabokas, Valerie Thouret, Jean-Pierre Cammas, Andreas Volz-Thomas, Damien Boulanger, Christos C. Repapis   +5 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

Systematic bias in evaluating chemical transport models with maximum daily 8 h average (MDA8) surface ozone for air quality applications: a case study with GEOS-Chem v9.02 [PDF]

Geoscientific Model Development, 2019
Chemical transport models frequently evaluate their simulation of surface ozone with observations of the maximum daily 8 h average (MDA8) concentration, which is the standard air quality policy metric.
K. R. Travis, K. R. Travis, D. J. Jacob, D. J. Jacob   +3 more
doaj   +1 more source

The unexpected high frequency of nocturnal surface ozone enhancement events over China: characteristics and mechanisms [PDF]

Atmospheric Chemistry and Physics, 2022
Surface ozone concentrations typically peak during the daytime, driven by active photochemical production, and decrease gradually after sunset, due to chemical destruction and dry deposition. Here, we report that nocturnal ozone enhancement (NOE, defined
C. He, C. He, X. Lu, X. Lu, H. Wang, H. Wang, H. Wang, H. Wang, Y. Li, G. He, G. He, Y. He, Y. He, Y. Wang, Y. Zhang, Y. Zhang, Y. Liu, Y. Liu, Q. Fan, Q. Fan, S. Fan, S. Fan   +21 more
doaj   +1 more source

Measurements of PAN, alkyl nitrates, ozone, and hydrocarbons during spring in interior Alaska [PDF]

, 1996
Measurements of the atmospheric mixing ratios of ozone, peroxyacetylnitrate (PAN), hydrocarbons, and alkyl nitrates were made in a boreal forest ecosystem in the interior of Alaska from March 15 to May 14, 1993.
Atlas, E, Beine, HJ, Blake, DR, Harris, J, Jaffe, DA   +4 more
core   +2 more sources

Airborne lidar measurements of aerosol and ozone above the Canadian oil sands region [PDF]

Atmospheric Measurement Techniques, 2018
Aircraft-based lidar measurements of atmospheric aerosol and ozone were conducted to study air pollution from the oil sands extraction industry in northern Alberta.
M. Aggarwal, J. Whiteway, J. Seabrook, L. Gray, K. Strawbridge, P. Liu, J. O'Brien, S.-M. Li, R. McLaren   +8 more
doaj   +1 more source

Photochemistry in the arctic free troposphere: Ozone budget and its dependence on nitrogen oxides and the production rate of free radicals [PDF]

, 2004
. Local ozone production and loss rates for the arctic free troposphere (58–85 ◦ N, 1–6 km, February–May) during the Tropospheric Ozone Production about the Spring Equinox (TOPSE) campaign were calculated using a constrained photochemical box model ...
Atlas, E, Blake, D, Cantrell, C, Coffey, M, Eisele, F, Flocke, F, Fried, A, Heikes, B, Lefer, B, Madronich, S, Mauldin, L, Ridley, B, Shetter, R, Stroud, C, Talbot, R, Weinheimer, A, Wert, B   +16 more
core   +2 more sources

Quantifying Polar Mesospheric Clouds Thermal Impact on Mesopause

Atmosphere
The article is focused on the quantitative assessment of the thermal impact of polar mesospheric clouds (PMCs) on the mesopause caused by the emission of absorbed solar and terrestrial infrared (IR) radiation by cloud particles.
Arseniy Sokolov, Elena Savenkova, Andrey Koval, Nikolai Gavrilov, Karina Kravtsova, Kseniia Didenko, Tatiana Ermakova   +6 more
doaj   +1 more source

Artificial Neural Network to predict mean monthly total ozone in Arosa, Switzerland

, 2006
Present study deals with the mean monthly total ozone time series over Arosa, Switzerland. The study period is 1932-1971. First of all, the total ozone time series has been identified as a complex system and then Artificial Neural Networks models in the ...
Acharya U. R., Bronnimann S., Comrie A. C., Dorling S., Gardner M., Goutami Bandyopadhyay, Kartalopoulos S. V., Monge Sanz B. M., Perez P., Staehelin J., Surajit Chattopadhyay, Varotsos C., Weiss A. K., Wilks D. S., Wolff G.   +14 more
core   +1 more source

Seasonal Cycle of the Total Ozone Content over Southern High Latitudes in the CCM SOCOLv3

Atmosphere
The severe ozone depletion over the Southern polar region, known as the “ozone hole,” is a stark example of global ozone depletion caused by human-made chemicals. This has implications for climate change and increased harmful surface solar UV.
Anastasia Imanova, Tatiana Egorova, Vladimir Zubov, Andrey Mironov, Alexander Polyakov, Georgiy Nerobelov, Eugene Rozanov   +6 more
doaj   +1 more source