Background concentrations and diurnal variability of carbon dioxide, methane, and carbon monoxide in the city of Ekaterinburg

GULYAEV, E. A.; Antonov, K. L.; Markelov, Yury I.

doi:10.1117/12.2575613

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…Previously it was found that in Ekaterinburg the highest mole fractions and variations of atmospheric CO 2 and CH 4 correspond to wind speeds up to 2.5 m s −1 (Gulyaev et al 2020). When wind speeds are higher than this threshold, polluted urban air is apparently quickly replaced by cleaner air resulting in a decrease in CO 2 and CH 4 mole fractions and its variations.…”

Section: Data Analysis Methodsmentioning

confidence: 98%

“…Evolution of the excess allows to detect the change in the anthropogenic contribution to the observed concentrations. For example, it was shown earlier (Gulyaev et al 2020) that the mean excess for urban area is minimal in spring comparing with other seasons, which is apparently associated with phenological effect of local ecosystems, providing partly an offset of anthropogenic emissions. In 2017-2018 in Ekaterinburg, the spring excess was approximately 4-5 ppm for CO 2 and 20-30 ppb for CH 4 , which was 1-1.5% relative to the background levels for both gases (Gulyaev et al 2020).…”

Section: Difference Between Measured and Background Concentrationsmentioning

confidence: 94%

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Short-term effect of COVID-19 lockdowns on atmospheric CO2, CH4 and PM2.5 concentrations in urban environment

GULYAEV

Antonov

Markelov

et al. 2022

Int. J. Environ. Sci. Technol.

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The COVID-19 pandemic has changed all areas of human activity as it forced the authorities around the world to enact unprecedented restrictions such as "lockdowns". The low economic activity reduced the anthropogenic impact on the environment, in particular, greenhouse gases and aerosols emissions were decreased. However, the associated change in air quality is difficult to directly observe and quantify, since concentrations of these components in urban areas are affected by many other factors. In this work statistical analysis of atmospheric CO 2 , CH 4 and PM 2.5 , measured in 2017-2020 in the city of Ekaterinburg, Russia, are presented. A detailed focus was made on the lockdown period from March 28 to April 30, 2020. A significant decrease in concentrations and inter-hourly variations of all studied components were observed only in the short "self-isolation" period from April 6 to April 8. The anthropogenic origin of this effect, primarily associated with the reduction in vehicular traffic, was concluded from mean diurnal cycles and air temperature correlations of all components. A decrease in the difference between measured and background CO 2 and CH 4 mole fractions was also found during this period. The difference was 1.3±0.2 ppm for CO 2 and 8±4 ppb for CH 4 , which was many times lower than during any other observed periods, suggesting a short-term effect of lockdown restrictions. Overall, a negative impact on the atmosphere quickly resumed after the recovery of economic activity. The approaches in this study can be used to detect weak fluctuations of atmospheric components in other urban territories.

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Section: Data Analysis Methodsmentioning

confidence: 98%

Section: Difference Between Measured and Background Concentrationsmentioning

confidence: 94%

Short-term effect of COVID-19 lockdowns on atmospheric CO2, CH4 and PM2.5 concentrations in urban environment

GULYAEV

Antonov

Markelov

et al. 2022

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

Variation Patterns of CO2 and CH4 according to the Measurements in the Surface Atmosphere over Urban and Suburban Areas in 2021–2022

Antonov,

Gulyaev,

Markelov

et al. 2024

Russ. Meteorol. Hydrol.

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Background concentrations and diurnal variability of carbon dioxide, methane, and carbon monoxide in the city of Ekaterinburg

Cited by 2 publications

References 10 publications

Short-term effect of COVID-19 lockdowns on atmospheric CO2, CH4 and PM2.5 concentrations in urban environment

Short-term effect of COVID-19 lockdowns on atmospheric CO2, CH4 and PM2.5 concentrations in urban environment

Variation Patterns of CO2 and CH4 according to the Measurements in the Surface Atmosphere over Urban and Suburban Areas in 2021–2022

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