Monitoring of atmospheric 14CO2 in central European countries

Světlík, Ivo; Tomaskova, L.; Molnár, Mihály; Svingor, Éva; Futó, István; Pintér, T.; Rulík, Petr; Michálek, V.

doi:10.1007/s10582-006-1030-5

Cited by 6 publications

(7 citation statements)

References 9 publications

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“…Sampling station locations are shown in Figure 1. The observed levels of atmospheric  14 CO 2 activity have already been reported (Svetlik et al 2006Molnár et al 2007). …”

Section: Samples and Methodsmentioning

confidence: 60%

“…In both locations, monthly integrated samples are collected using dynamic absorption in carbonate-free 0.7M NaOH solution. 14 C activity determinations are based on benzene preparation and measurement by a low-background liquid scintillation spectrometer Quantulus 1220™ (Svetlik et al 2006). For calibration purposes, oxalic acid NIST SRM 4990C has been used (Schneider et al 1995).…”

Section: Samples and Methodsmentioning

confidence: 99%

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Estimation of Long-Term Trends in the Tropospheric ¹⁴CO₂ Activity Concentration

Světlík¹,

Povinec

Molnár

et al. 2010

Radiocarbon

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ABSTRACT. Fossil CO 2 emissions have been diluting the global 14 C/C ratio of atmospheric CO 2 (Suess effect). We estimated the 14 CO 2 amount in the atmosphere (and its trend) utilizing the calculated 14 CO 2 activity concentration in the atmosphere (a acn , reported in mBq m -3 ). This parameter, calculated from  14 CO 2 and the CO 2 mixing ratio (reported in micromoles of CO 2 per mole of air), is connected with the 14 CO 2 quantity in the volume or mass unit of air, which is not influenced by the Suess effect. This parameter can only be influenced by processes linked to 14 CO 2 emissions/uptake, e.g. associated with atmosphere-biosphere or atmosphere-ocean CO 2 exchange as well as by anthropogenic emissions of 14 CO 2 . Results obtained from measurements at Schauinsland station, Germany, indicate a stable amount of 14 CO 2 in the atmosphere since the early 1990s.

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“…Sampling station locations are shown in Figure 1. The observed levels of atmospheric  14 CO 2 activity have already been reported (Svetlik et al 2006Molnár et al 2007). …”

Section: Samples and Methodsmentioning

confidence: 60%

Section: Samples and Methodsmentioning

confidence: 99%

Estimation of Long-Term Trends in the Tropospheric ¹⁴CO₂ Activity Concentration

Světlík¹,

Povinec

Molnár

et al. 2010

Radiocarbon

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“…where S lr is the local and regional Suess effect (reported in per mil of fossil contribution in the carbon isotopic mixture), a JF is the fit with harmonics for the seasonal cycle of the reference 14 C activity measured in the Jungfraujoch monitoring station, and a obs is the value observed in a given monitoring station (Nakazawa et al 1997;Svetlik et al 2006;Levin et al 2008). All activities utilized in this formula are given in per mil of  14 C (Stuiver and Polach 1977).…”

Section: Resultsmentioning

confidence: 99%

“…where S l is the local Suess effect (reported in per mil of fossil contribution in the carbon isotopic mixture), and a reg is the regional reference activity observed in the corresponding location where local sources of fossil carbon can be neglected (Svetlik et al 2006). To minimize distortions given by different atmospheric conditions, the time behavior of mean monthly temperature data should be similar in the regional reference monitoring station and in the compared locality.…”

Section: Resultsmentioning

confidence: 99%

“…The intentions of monitoring were the following (Svetlik et al 2006;Molnár et al 2007 Monthly CO 2 samples were collected by bubbling the air through a 0.7M NaOH solution in 1.9-L flasks (the final amount of carbonates did not exceed 30% of the saturation capacity of the solution) located at the Prague-Bulovka and Koöetice sampling stations. The samples were processed by acid carbonate decomposition, CO 2 purification, benzene preparation, and measurement by a low-background liquid scintillation spectrometer, Quantulus 1220™ (Svetlik et al 2006;Molnár et al 2007). For calibration purposes, oxalic acid NIST (National Institute of Standards and Technology, Gaithersburg, USA) SRM 4990C, has been used.…”

Section: Samples and Methodsmentioning

confidence: 99%

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Radiocarbon in the Air of Central Europe: Long-Term Investigations

Světlík¹,

Povinec

Molnár

et al. 2010

Radiocarbon

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ABSTRACT. Regional levels of radiocarbon have been monitored in order to investigate the impact of fossil fuel combustion on the activity of atmospheric 14 CO 2 in central Europe. Data from atmospheric 14 CO 2 monitoring stations in the Czech Republic, Slovakia, and Hungary for the period 2000-2008 are presented and discussed. The Prague and Bratislava monitoring stations showed a distinct local Suess effect when compared to the Jungfraujoch clean-air monitoring station. However, during the summer period, statistically insignificant differences were observed between the low-altitude stations and the highmountain Jungfraujoch station. 14 C data from the Hungarian monitoring locality at Dunaföldvár and the Czech monitoring station at Koöetice, which are not strongly affected by local fossil CO 2 sources, indicate similar grouping and amplitudes, typical for a regional Suess effect.

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