Photochemical equilibrium of odd oxygen and hydrogen families at the mesospheric altitudes

2021 ◽  
Author(s):  
Alexey Chubarov ◽  
Mikhail Kulikov ◽  
Mikhail Belikovich ◽  
Alexander Feigin
Keyword(s):  
Odd Oxygen

scholarly journals Nocturnal odd-oxygen budget and its implications for ozone loss in the lower troposphere

2006 ◽  
Vol 33 (8) ◽  
Author(s):  
S. S. Brown ◽  
J. A. Neuman ◽  
T. B. Ryerson ◽  
M. Trainer ◽  
W. P. Dubé ◽  
...  
Keyword(s):  
Lower Troposphere ◽  
Ozone Loss ◽  
Oxygen Budget ◽  
Odd Oxygen

scholarly journals Diurnal variation in Mars equatorial odd oxygen species: Chemical production and loss mechanisms

Icarus ◽  
2020 ◽  
Vol 336 ◽  
pp. 113458
Author(s):  
D. Viúdez-Moreiras ◽  
A. Saiz-Lopez ◽  
C.S. Blaszczak-Boxe ◽  
J.A. Rodriguez Manfredi ◽  
Y.L. Yung
Keyword(s):  
Diurnal Variation ◽  
Oxygen Species ◽  
Chemical Production ◽  
Odd Oxygen ◽  
Loss Mechanisms

scholarly journals An Odd Oxygen Framework for Wintertime Ammonium Nitrate Aerosol Pollution in Urban Areas: NO x and VOC Control as Mitigation Strategies

2019 ◽  
Vol 46 (9) ◽  
pp. 4971-4979 ◽  
Author(s):  
C. C. Womack ◽  
E. E. McDuffie ◽  
P. M. Edwards ◽  
R. Bares ◽  
J. A. Gouw ◽  
...  
Keyword(s):  
Ammonium Nitrate ◽  
Urban Areas ◽  
Mitigation Strategies ◽  
Aerosol Pollution ◽  
Nitrate Aerosol ◽  
Odd Oxygen ◽  
Oxygen Framework

scholarly journals Correlation of secondary organic aerosol with odd oxygen in Mexico City

2008 ◽  
Vol 35 (15) ◽  
Author(s):  
Scott C. Herndon ◽  
Timothy B. Onasch ◽  
Ezra C. Wood ◽  
Jesse H. Kroll ◽  
Manjula R. Canagaratna ◽  
...  
Keyword(s):  
Mexico City ◽  
Secondary Organic Aerosol ◽  
Organic Aerosol ◽  
Odd Oxygen

HOx, NOx, and ClOx: Their Role in Atmospheric Photochemistry

1974 ◽  
Vol 52 (8) ◽  
pp. 1582-1591 ◽  
Author(s):  
Steven C. Wofsy ◽  
Michael B. McElroy
Keyword(s):  
Gas Phase ◽  
Phase Reaction ◽  
Dominant Form ◽  
Supersonic Aircraft ◽  
Mesospheric Ozone ◽  
Ozone Photochemistry ◽  
Odd Nitrogen ◽  
Good Agreement ◽  
Odd Oxygen

Sources of atmospheric odd nitrogen and hydrogen are reviewed and their role m ozone photochemistry is discussed. A model, containing few adjustable parameters, gives good agreement with observed distributions of stratospheric and mesospheric ozone. Nitric oxide emitted by supersonic aircraft would lead to a significant reduction in the concentration of atmospheric ozone if the globally averaged source of NO should exceed 2 × 107 molecules cm−2 s−1. A traffic model projected by Broderick etal. for 1990 could lead to a reduction of about 2% in the column density of O3.Sources of atmospheric chlorine are discussed. It is argued that HCl should be the dominant form of atmospheric chlorine and that it is produced mainly from aerosols of marine origin. The atmospheric source strength is about 2 × 108 tons per year according to Chesselet etal. and HCl may be removed by gas phase reaction with NH3. The role of chlorine compounds as a catalyst for recombination of odd oxygen is discussed and shown to play no major role in the normal atmosphere. Reactions of OH and HO2 with O3 may provide an important sink for tropospheric odd oxygen such that O3 may not be a passive tracer for tropospheric motions.

scholarly journals Investigation of the correlation between odd oxygen and secondary organic aerosol in Mexico City and Houston

2010 ◽  
Vol 10 (2) ◽  
pp. 3547-3604 ◽  
Author(s):  
E. C. Wood ◽  
M. R. Canagaratna ◽  
S. C. Herndon ◽  
J. H. Kroll ◽  
T. B. Onasch ◽  
...  
Keyword(s):  
Mexico City ◽  
Secondary Organic Aerosol ◽  
Formation Rate ◽  
Organic Aerosol ◽  
Ozone Production ◽  
Volatile Components ◽  
Petrochemical Plant ◽  
Plant Emissions ◽  
Photochemical Aging ◽  
Odd Oxygen

Abstract. Many recent models underpredict secondary organic aerosol (SOA) particulate matter (PM) concentrations in polluted regions, indicating serious deficiencies in the models' chemical mechanisms and/or missing SOA precursors. Since tropospheric photochemical ozone production is much better understood, we investigate the correlation of odd-oxygen ([Ox]≡[O3]+[NO2]) and the oxygenated component of organic aerosol (OOA), which is interpreted as a surrogate for SOA. OOA and Ox measured in Mexico City in 2006 and Houston in 2000 were well correlated in air masses where both species were formed on similar timescales (less than 8 h) and not well correlated when their formation timescales or location differed greatly. When correlated, the ratio of these two species ranged from 30 μg m−3 ppm−1 (STP) in Houston during time periods affected by large petrochemical plant emissions to as high as 160 μg m−3 ppm−1 in Mexico City, where typical values were near 120 μg m−3 ppm−1. On several days in Mexico City, the [OOA]/[Ox] ratio decreased by a factor of ~2 between 08:00 and 13:00 LT. This decrease is only partially attributable to evaporation of the least oxidized and most volatile components of OOA; differences in the diurnal emission trends and timescales for photochemical processing of SOA precursors compared to ozone precursors also likely contribute to the observed decrease. The extent of OOA oxidation increased with photochemical aging. Calculations of the ratio of the SOA formation rate to the Ox production rate using ambient VOC measurements and traditional laboratory SOA yields are lower than the observed [OOA]/[Ox] ratios by factors of 5 to 15, consistent with several other models' underestimates of SOA. Calculations of this ratio using emission factors for organic compounds from gasoline and diesel exhaust do not reproduce the observed ratio. Although not succesful in reproducing the atmospheric observations presented, modeling P(SOA)/P(Ox) can serve as a useful test of photochemical models using improved formulation mechanisms for SOA.

Competing pathways in odd oxygen photochemistry of the martian atmosphere

2020 ◽  
Vol 181 ◽  
pp. 104783
Author(s):  
Ashimananda Modak ◽  
Varun Sheel ◽  
Franck Lefèvre
Keyword(s):  
Martian Atmosphere ◽  
Competing Pathways ◽  
Odd Oxygen
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