Atmospheric Fossil Fuel CO<sub>2</sub> Measurement Using a Field Unit in a Central European City During the Winter of 2008/09

Molnár, Mihály; Haszpra, László; Svingor, Éva; Major, István; Světlík, Ivo

doi:10.1017/s0033822200045859

Cited by 12 publications

(14 citation statements)

References 34 publications

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“…In Debrecen, the atmospheric CO 2 mole fraction was measured by a Siemens ® ULTRAMAT 6F NDIR type CO 2 gas analyzer with an uncertainty of 0.5 µmol/mol. Calibration of the device was performed every 3 hr using synthetic air-based calibration gases with a known mole fraction of CO 2 (Molnár et al 2010a). …”

Section: Major Et Almentioning

confidence: 99%

One-Year-Long Continuous and Synchronous Data Set of Fossil Carbon in Atmospheric PM_2.5 and Carbon Dioxide in Debrecen, Hungary

et al. 2015

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ABSTRACT. Radiocarbon investigation of atmospheric PM 2.5 aerosol synchronized with 14 CO 2 observations began in Debrecen in the winter of 2010. The aim of the study was to determine the contemporary and fossil carbon fractions in the aerosol and to set them against the fossil CO 2 excess data referring to the same period. The mass of the collected PM 2.5 mode on prebaked quartz filters was determined gravimetrically, while its total carbon mass was calculated from the pressure of CO 2 gas produced after the combustion of the filters. As a result of the applied sampling and preparation method, the stable, nonvolatile carbon forms were principally studied.14 C measurements of the tiny aerosol bulk samples were performed using the EnvironMICADAS accelerator mass spectrometer at ATOMKI. The sample preparation method was tested using several blanks, standards, and real samples. Test results showed good reproducibility for the applied aerosol sample preparation and accelerator mass spectrometry (AMS) 14 C analyses. Atmospheric fossil CO 2 excess data were calculated according Levin et al. (2003), using the 14 C results of collected CO 2 samples measured by the gas proportional counting system at ATOMKI. Mass concentration of PM 10 involving the PM 2.5 mode in the city air exceeded the daily average of 50 µg/m 3 (24-hr limit value in the EU) several times in 2011, mainly during the winter. The results showed that recently derived carbon most likely from domestic wood burning was causing the elevated carbon mass concentration of PM 2.5 in Debrecen at the time. In the course of the 1-yr-long continuous and systematic comparison of fossil carbon mass concentration of PM 2.5 mode and mole fraction of fossil excess of atmospheric CO 2 , similar and synchronous trends were observed during the studied period in Debrecen.

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Section: Major Et Almentioning

confidence: 99%

One-Year-Long Continuous and Synchronous Data Set of Fossil Carbon in Atmospheric PM_2.5 and Carbon Dioxide in Debrecen, Hungary

et al. 2015

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“…This site provides a rural regional background for the urban fossil fuel CO 2 excess studies of Debrecen city that is also situated in Hungary, approximately 380 km east of Hegyhátsál. Hence, there is a rural and an urban site in the Carpathian Basin where the mole fraction of CO 2 , fossil fuel and modern CO 2 excess relative to a free tropospheric reference as well as the influence of these factors can be investigated (Molnár et al 2010b).…”

Section: Methodsmentioning

confidence: 99%

“…At the Hegyhátsál station, two ATOMKI-developed CO 2 samplers were installed for sampling of the respective elevations, to obtain monthly integrated samples for 14 C measurements (Molnár et al 2010a, 2010b). The inlets of the samplers are connected to the exhaust lines of the CO 2 analyzer used, so the CO 2 monitoring is not affected by the sample collecting on process.…”

Section: Methodsmentioning

confidence: 99%

Temporal Variation of Atmospheric Fossil and Modern CO₂Excess at a Central European Rural Tower Station between 2008 and 2014

et al. 2018

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In 2008, the atmospheric CO2 measurements at the Hegyhátsál rural tower station were extended further by 14CO2 air sampling from two elevations (115 and 10 m a.g.l.), in cooperation with HEKAL (ICER). Since then, a complete six-year-long (2008–2014) dataset of atmospheric CO2, Δ14C, fossil, and modern CO2 excess (relative to Jungfraujoch) has been assembled and evaluated. Based on our results, the annual mean CO2 mole fraction rose at both elevations in this period. The annual mean Δ14CO2 values decreased with a similar average annual decline. Based on our comparison, planetary boundary layer height obtained by modeling has a larger influence on the variation of mole fraction of CO2 (relative to Jungfraujoch), than on its carbon isotopic composition, i.e. the boundary layer rather represents a physical constraint. Fossil fuel CO2 excess at both elevations can rather be observed in wintertime and mainly due to the increased anthropogenic emission of nearby cities in the region. The mean modern CO2 excess at both elevations was even larger in winter, but it drastically decreased at 115 m by summer, while it remained at the winter level at 10 m.

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“…This approach has been successfully applied for cities in Europe, Asia, and North America with fossil fuel burning as the major source of anthropogenic CO 2 , by monitoring atmospheric 14 CO 2 (e.g. Takahashi et al 2002;Turnbull et al 2006;Kuc et al 2007;Levin et al 2008;Molnár et al 2010;Zhou et al 2014). Another important anthropogenic perturbation to atmospheric 14 C levels was its significant increase, up to twice the natural levels, derived from the atmospheric nuclear tests performed during the 1950s and 1960s.…”

Section: Introductionmentioning

confidence: 99%

Temporal and Spatial Variations of Atmospheric Radiocarbon in the Mexico City Metropolitan Area

et al. 2015

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The Mexico City Metropolitan Area (MCMA) produces a complex mixture of gases and aerosols from diverse sources, including burning of fossil fuels, biomass, and wastes, with a significant biogenic contribution. We present the first results of ongoing projects to study temporal and spatial variations of 14CO2 in the area. Temporal variations reconstructed from tree rings of Taxodium mucronatum indicate a considerable radiocarbon depletion, in accordance to the vast amount of fossil fuels burnt inside Mexico Valley, with values between 62 and 246‰ lower than background values for the 1962–1968 period, and lower by 51–88‰ for the 1983–2010 period. The lower dilution found for the last decades might indicate an increase in enriched 14CO2 sources. Results from the spatial distribution, as revealed from integrated CO2 samples and grasses from six points within the MCMA collected during the 2013 dry season, show variations between sites and sample types. For integrated CO2 samples, values range from 35.6‰ to 54.0‰, and for grasses between −86.8‰ and 40.7‰. For three of the sampling points, the grasses are significantly depleted, by up to ∼133‰, as compared to the corresponding integrated CO2 sample. This may result from differences in the carbon assimilation period and exposure to different CO2 sources. Higher-than-background Δ14C values were found for all integrated CO2 samples, presumably resulting from 14C-enriched CO2 derived from forest fires in the mountains during the sampling period. Results obtained so far confirm the complexity of the 14C cycle in the MCMA.

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Atmospheric Fossil Fuel CO₂ Measurement Using a Field Unit in a Central European City During the Winter of 2008/09

Cited by 12 publications

References 34 publications

One-Year-Long Continuous and Synchronous Data Set of Fossil Carbon in Atmospheric PM_2.5 and Carbon Dioxide in Debrecen, Hungary

One-Year-Long Continuous and Synchronous Data Set of Fossil Carbon in Atmospheric PM_2.5 and Carbon Dioxide in Debrecen, Hungary

Temporal Variation of Atmospheric Fossil and Modern CO₂Excess at a Central European Rural Tower Station between 2008 and 2014

Temporal and Spatial Variations of Atmospheric Radiocarbon in the Mexico City Metropolitan Area

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Atmospheric Fossil Fuel CO2 Measurement Using a Field Unit in a Central European City During the Winter of 2008/09

Cited by 12 publications

References 34 publications

One-Year-Long Continuous and Synchronous Data Set of Fossil Carbon in Atmospheric PM2.5 and Carbon Dioxide in Debrecen, Hungary

One-Year-Long Continuous and Synchronous Data Set of Fossil Carbon in Atmospheric PM2.5 and Carbon Dioxide in Debrecen, Hungary

Temporal Variation of Atmospheric Fossil and Modern CO2Excess at a Central European Rural Tower Station between 2008 and 2014

Temporal and Spatial Variations of Atmospheric Radiocarbon in the Mexico City Metropolitan Area

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Atmospheric Fossil Fuel CO₂ Measurement Using a Field Unit in a Central European City During the Winter of 2008/09

One-Year-Long Continuous and Synchronous Data Set of Fossil Carbon in Atmospheric PM_2.5 and Carbon Dioxide in Debrecen, Hungary

One-Year-Long Continuous and Synchronous Data Set of Fossil Carbon in Atmospheric PM_2.5 and Carbon Dioxide in Debrecen, Hungary

Temporal Variation of Atmospheric Fossil and Modern CO₂Excess at a Central European Rural Tower Station between 2008 and 2014