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DOI	10.1016/j.atmosenv.2021.118372
	Greenhouse gases (CO2 and CH4) at an urban background site in Athens, Greece: Levels, sources and impact of atmospheric circulation
	Dimitriou K.; Bougiatioti A.; Ramonet M.; Pierros F.; Michalopoulos P.; Liakakou E.; Solomos S.; Quehe P.-Y.; Delmotte M.; Gerasopoulos E.; Kanakidou M.; Mihalopoulos N.
发表日期	2021
ISSN	1352-2310
卷号	253
英文摘要	Year-round carbon dioxide (CO2) and methane (CH4) concentration measurements, performed for the first time in the city of Athens, Greece from December 21, 2018 to December 31, 2019, are presented in this study and analyzed in relation to atmospheric circulation patterns at a local, regional and long-range transport scale. Clear diurnal and seasonal variations of both greenhouse gases were detected. The observed increased levels during night and early morning hours are attributed to traffic/heating emissions and leakages of residential natural gas for CO2 and CH4, respectively. Using CO2 and CH4 levels simultaneously measured at the regional background site at Finokalia (Greece), increments in their levels due to local and regional anthropogenic sources within the city were assessed. For CO2, maximum and minimum increments were clearly observed during winter and summer respectively, suggesting a greater impact of combustion of fossil fuel and especially of biomass on CO2 levels during winter. On the other hand, CH4 increments were similar in all seasons, suggesting that local sources of CH4 remain quite constant year-round. Through the implementation of the Conditional Probability Function (CPF), the emission sources of theses greenhouse gases have been localized to the northern and the eastern domains of the Athens basin. Stagnant atmospheric conditions were also associated with an increased likelihood of CO2 and CH4 episodes. Backward modeling simulations with FLEXPART and HYSPLIT models indicate an industrial zone and a petrochemical zone, situated to the north and to the west of Athens respectively, as possible CH4 regional sources as well as possible CO2 contributions from southern directions attributed to shipping emissions from the port of Piraeus. The present study provides knowledge needed for the determination of greenhouse gas emission mitigation strategies in Athens. © 2021 Elsevier Ltd
关键词	CH4 CO2 CPF FLEXPART Greenhouse gases PSCF
语种	英语
scopus关键词	Atmospheric movements; Climatology; Fossil fuels; Gas emissions; Greenhouse gases; Industrial emissions; Urban growth; Atmospheric circulation; Atmospheric circulation patterns; Carbon dioxides (CO); CH$-4$; Concentration Measurement; Conditional probability function; FLEXPART; Greenhouses gas; PSCF; Urban background; Carbon dioxide; carbon dioxide; fossil fuel; methane; natural gas; atmospheric circulation; background level; carbon dioxide; concentration (composition); greenhouse gas; methane; mitigation; pollutant source; traffic emission; urban pollution; air quality; Article; atmospheric dispersion; biomass; boundary layer; car; carbon footprint; circadian rhythm; combustion; comparative study; concentration (parameter); Greece; grid cell; priority journal; residential area; sea level; seasonal variation; summer; traffic pollution; urban area; wind speed; winter; Athens [Attica]; Attica; Greece
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248490
作者单位	Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palaia Penteli, Athens, 15236, Greece; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, 91191, France; Research Centre for Atmospheric Physics and Climatology, Academy of Athens, Athens, 10680, Greece; Climate and Atmosphere Research Center, The Cyprus Institute, 20 Konstantinou Kavafi, Aglantzia, Nicosia 2121, Cyprus; University of Crete, Department of Chemistry, Environmental Chemical Processes Laboratory, Heraklion, Crete 70013, Greece
推荐引用方式 GB/T 7714	Dimitriou K.,Bougiatioti A.,Ramonet M.,et al. Greenhouse gases (CO2 and CH4) at an urban background site in Athens, Greece: Levels, sources and impact of atmospheric circulation[J],2021,253.
APA	Dimitriou K..,Bougiatioti A..,Ramonet M..,Pierros F..,Michalopoulos P..,...&Mihalopoulos N..(2021).Greenhouse gases (CO2 and CH4) at an urban background site in Athens, Greece: Levels, sources and impact of atmospheric circulation.ATMOSPHERIC ENVIRONMENT,253.
MLA	Dimitriou K.,et al."Greenhouse gases (CO2 and CH4) at an urban background site in Athens, Greece: Levels, sources and impact of atmospheric circulation".ATMOSPHERIC ENVIRONMENT 253(2021).