The NOx-Limiting Regime of Photochemical Ozone Generation in a Weakly Polluted Convective Boundary Layer: Observations at the ZOTTO Tall Tower Observatory in Central Siberia, 2007–2015
- Authors: Moiseenko K.B.1, Berezina E.V.1, Vasileva A.V.1, Shtabkin Y.A.1, Skorokhod A.I.1, Elanskii N.F.1, Belikov I.B.1
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Affiliations:
- Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences
- Issue: Vol 487, No 2 (2019)
- Pages: 981-985
- Section: Geophysics
- URL: https://journals.rcsi.science/1028-334X/article/view/195376
- DOI: https://doi.org/10.1134/S1028334X19080282
- ID: 195376
Cite item
Abstract
Estimates of the photochemical ozone generation rate, PQ, and the ozone production efficiency (OPE) per molecule of NOx (=NO + NO2), ∆P, are obtained for the region of Central Siberia based on near surface observations of the concentrations of ozone (O3) and nitrogen oxides (NO and NO2) at ZOTTO (Zotino Tall Tower Observatory) in 2007–2015. The experimental data are approximated well by the power dependences PQ ∝ [NOx]–n + 1, ΔP ∝ [NOx]–n, n = 0.82 ± 0.06 (the determination coefficient R2 = 0.66), which correspond to the NOx-limiting regime of ozone generation in a weakly polluted air mass. The average value for the summer months ΔP ~ 30.0–43.7 [mol.O3/mol.NOx] agrees with the OPE value of 39.8 [mol.O3/mol.NOx] obtained from the numerical experiments using the GEOS-chem global transport-chemical model. The observation data indicate the significant role of anthropogenic emissions of NOx in the regional ozone balance and the necessity of taking this factor into account in predicting ecological risks in the Siberian regions that are traditionally regarded as ecologically pure.
About the authors
K. B. Moiseenko
Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences
Author for correspondence.
Email: konst.dvina@gmail.com
Russian Federation, Moscow, 119017
E. V. Berezina
Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences
Email: konst.dvina@gmail.com
Russian Federation, Moscow, 119017
A. V. Vasileva
Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences
Email: konst.dvina@gmail.com
Russian Federation, Moscow, 119017
Yu. A. Shtabkin
Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences
Email: konst.dvina@gmail.com
Russian Federation, Moscow, 119017
A. I. Skorokhod
Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences
Email: konst.dvina@gmail.com
Russian Federation, Moscow, 119017
N. F. Elanskii
Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences
Email: konst.dvina@gmail.com
Russian Federation, Moscow, 119017
I. B. Belikov
Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences
Email: konst.dvina@gmail.com
Russian Federation, Moscow, 119017