Measurements of column content and vertical distribution of NO2 at Zvenigorod Scientific Station

Aleksandr S. Elokhov; Aleksandr N. Gruzdev

doi:10.1117/12.337068

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13 January 1999 Measurements of column content and vertical distribution of NO₂ at Zvenigorod Scientific Station

Aleksandr S. Elokhov, Aleksandr N. Gruzdev

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Proceedings Volume 3583, Fifth International Symposium on Atmospheric and Ocean Optics; (1999) https://doi.org/10.1117/12.337068
Event: Fifth International Symposium on Atmospheric and Ocean Optics, 1998, Tomsk, Russian Federation

Abstract

Since 1990, regular measurements of columnar abundance and vertical distribution of NO₂ are carried out at Zvenigorod Scientific Station (50 degree(s)N, 38 degree(s)E) of the Oboukhov Institute of Atmospheric Physics with the use of visible, zenith viewing, grating spectrometer scanning in the wavelength range 435-450 nm. Measurements are done during morning and evening twilight at solar zenith angles 84 degree(s) - 96 degree(s). The method of NO₂ derivation is based on analysis of NO₂ differential absorption taking into account ozone absorption, single molecular and aerosol scattering and the Ring effect. Vertical NO₂ distribution is retrieved as a solution of reverse mathematical problem using the Chahine method. The kernel in the problem is computed taking into account photochemical processes. A NO₂ vertical profile is represented by ten 5-km thick layers and a thin surface layer. Counting the surface layer as an additional layer is necessary for correct NO₂ determination in conditions of the lower troposphere contaminated by nitrogen oxides. Results of eight years of NO₂ measurements at Zvenigorod Station are presented. The NO₂ annual variations in the stratosphere and the troposphere are analyzed; effects of interannual NO₂ variability are considered as well. Also analyzed are the NO₂ decrease in 1992 after the Mt. Pinatubo eruption and the following gradual recovery of the NO₂ layer. Other NO₂ anomalies are considered as well.

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Aleksandr S. Elokhov and Aleksandr N. Gruzdev "Measurements of column content and vertical distribution of NO₂ at Zvenigorod Scientific Station", Proc. SPIE 3583, Fifth International Symposium on Atmospheric and Ocean Optics, (13 January 1999); https://doi.org/10.1117/12.337068

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