Some features of seasonal variations in the methane content in the atmosphere over northern Eurasia

Гинзбург, А. С.; Виноградова, А. А.; Fedorova, E. I.

doi:10.1134/s0001433811010087

Cited by 16 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the global scale of different processes should not be ignored. Ginzburg et al (2011) considered the influence of the winter of 2006e2007, which was anomalously warm in northern Europe and western Siberia, on the CH 4 increase recorded in 2007. Similarly, anthropogenic emissions in Asia seem to have a global impact although their timing or strength has been questioned (Dalsøren et al, 2016).…”

Section: Trend Analysismentioning

confidence: 99%

Trend analysis of CO2 and CH4 recorded at a semi-natural site in the northern plateau of the Iberian Peninsula

Pérez

Sánchez

García

et al. 2017

Atmospheric Environment

View full text Add to dashboard Cite

show abstract

Section: Trend Analysismentioning

confidence: 99%

Trend analysis of CO2 and CH4 recorded at a semi-natural site in the northern plateau of the Iberian Peninsula

Pérez

Sánchez

García

et al. 2017

Atmospheric Environment

View full text Add to dashboard Cite

show abstract

“…The CH 4 content in the surface atmosphere in the absence of strong anthropogenic sources usually tends to growth with an increase in temperature due to the methanogenesis. This process occurs most actively at air temperature of 30-40 °C, but in some cases increased methane effluxes are also observed immediately after the snow cover melts (Ginzburg et al 2011;Harriss et al 1982;Vinogradova et al 2007). The anthropogenic factors in urban areas can significantly distort the expected positive correlation between atmospheric CH 4 and air temperature.…”

Section: Influence Of Air Temperaturementioning

confidence: 99%

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

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.

show abstract

“…CO2 uptake and higher photochemical reactions during the day are also considered to be important causes of the lowest CO2 and CH4 concentrations, respectively (Lee et al, 2012). As regards CH4, the more intense vertical mixing during the daytime drives CH4 transport into higher atmospheric layers where chemical reactions with OH, chlorine, and excited oxygen are more active, thereby increasing atmospheric dilution, as reported by Ginzburg et al (2011), and thus decreasing the CH4 mixing ratio. However, at night, radiation loss at ground level leads to a shallow stable boundary layer (Fang et al, 2013;Hernández-Paniagua et al, 2015), which reaches 405 m at CIBA, trapping CO2 and CH4 emissions between the ground and the top of the boundary layer and increasing their mole fraction values (Fang et al, 2013;García et al, 2012).…”

Section: Discussionmentioning

confidence: 95%

Analysis of CO2 and CH4 temporal patterns and the Valladolid urban plume influence over the upper Spanish plateau

Duque¹

View full text Add to dashboard Cite

1.2. Resumen 5 2. Introduction 9 2.1. An overview 9 2.2. CO2 2.3. CH4 2.4. The importance of accurate CO2 and CH4 mixing ratio measurements 2.5. CIBA station characteristics 2.6. Time series 2.7. Valladolid urban plume analysis 2.8. Motivation of the study 3. Objectives 3.1. General objective 3.2. Specific objectives 4. Material and methods 4.1. Site description 4.2. Monitoring station 4.3. Instrumentation 4.4. Database 4.5. Software employed 4.6. Mathematical equations used 4.7. Statistical techniques 4.8. Graphical summary techniques 4.9. Validation methods 5. List of Original Contributions 6. Original Contributions 6.1. Harmonic function for describing CO2 and CH4 temporal patterns: Original Contribution I 6.2. Kernel functions for describing CO2 and CH4 temporal patterns: Original Contribution II 6.3. Local regression functions for describing CO2 and CH4 temporal patterns: Original Contribution III 101 6.4. Valladolid urban plume influence on the final CO2 and CH4 mixing ratios at CIBA: Original Contribution IV 115 7. General results 133 7.1. CO2 and CH4 temporal analysis 133 7.2. Back-trajectory analysis 136 II 7.3. Validation indicators 8. General discussion 8.1. Temporal pattern evolution 8.2. Mathematical equations for analysing temporal patterns 8.3. Valladolid urban plume analysis 9. Conclusions / Conclusiones 9.1. Conclusions 9.2. Conclusiones 10. References 11. Appendices 11.1. Acronyms 11.2. List of tables and figures 2.1.1.1. The Intergovernmental Panel on Climate Change (IPCC) In 1988 the World Meteorological Organization (WMO) and the United Nations EnvironmentProgram (UNEP) created the Intergovernmental Panel on Climate Change (IPCC) to analyse the problem of global climate change. The IPCC is a group open to all members of the United Nations and WMO (IPCC, 2020a). The function of the IPCC is not to conduct its own research but to analyse, in a comprehensive, objective, open and transparent way, the relevant scientific, technical and socioeconomic information required to understand the scientific elements involved in climate change caused by human activities, its possible repercussions and the possibilities of attenuation and/or adaptation (IPCC, 2020a). In addition, through their evaluations, the IPCC seeks to identify the strength of scientific agreement in different areas and indicates where further research is needed. The IPCC is made up of three different working In 2015, the 21 st Conference of the Parties (COP 21) of the United Nations Framework on Climate Change (UNFCCC) took place in Paris, ending with the adoption of the Paris Agreement by the 195 UNFCCC countries (Boffino et al., 2019). The Paris Agreement establishes the global framework for combating climate change from 2020, promoting a transition towards a low-emission economy in the fight against climate change (Boffino et al., 2019; Pauw et al., 2019). This agreement establishes a plan to reduce emissions of CO2 and other greenhouse gases, aiming to keep global temperature increases to below 2ºC relative to 2.3.1. The CH4 cycle A...

show abstract

Some features of seasonal variations in the methane content in the atmosphere over northern Eurasia

Cited by 16 publications

References 10 publications

Trend analysis of CO2 and CH4 recorded at a semi-natural site in the northern plateau of the Iberian Peninsula

Trend analysis of CO2 and CH4 recorded at a semi-natural site in the northern plateau of the Iberian Peninsula

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

Analysis of CO2 and CH4 temporal patterns and the Valladolid urban plume influence over the upper Spanish plateau

Contact Info

Product

Resources

About