Radiocarbon observations in atmospheric CO₂: Determining fossil fuel CO₂ over Europe using Jungfraujoch observations as background

Monthly mean ¹⁴CO₂ observations at two regional stations in Germany (Schauinsland observatory, Black Forest, and Heidelberg, upper Rhine valley) are compared with free tropospheric background measurements at the High Alpine Research Station Jungfraujoch (Swiss Alps) to estimate the regional fossil f...

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Bibliographic Details
Published in:The Science of the total environment 2008-03, Vol.391 (2-3), p.211-216
Main Authors: Levin, Ingeborg, Hammer, Samuel, Kromer, Bernd, Meinhardt, Frank
Format: Article
Language:English
Subjects:
Air Pollutants - analysis
Carbon Dioxide - analysis
Carbon Radioisotopes - analysis
Environmental Monitoring
Fossil Fuels
Germany
Switzerland
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Summary:Monthly mean ¹⁴CO₂ observations at two regional stations in Germany (Schauinsland observatory, Black Forest, and Heidelberg, upper Rhine valley) are compared with free tropospheric background measurements at the High Alpine Research Station Jungfraujoch (Swiss Alps) to estimate the regional fossil fuel CO₂ surplus at the regional stations. The long-term mean fossil fuel CO₂ surplus at Schauinsland is 1.31±0.09 ppm while it is 10.96±0.20 ppm in Heidelberg. No significant trend is observed at both sites over the last 20 years. Strong seasonal variations of the fossil fuel CO₂ offsets indicate a strong seasonality of emissions but also of atmospheric dilution of ground level emissions by vertical mixing.
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2007.10.019