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 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.
Institut für Umweltphysik, University of Heidelberg, INF 229, 69120 Heidelberg, Germany. Ingeborg.Levin@iup.uni-heidelberg.de
Ingeborg
I
Levin
Samuel
S
Hammer
Bernd
B
Kromer
Frank
F
Meinhardt
D000393:Air Pollutants / Q000032:analysis*; D002245:Carbon Dioxide / Q000032:analysis*; D002250:Carbon Radioisotopes / Q000032:analysis; D004784:Environmental Monitoring; D005579:Fossil Fuels; D005858:Germany; D013557:Switzerland
D000393:Air Pollutants; D002250:Carbon Radioisotopes; D005579:Fossil Fuels; D002245:Carbon Dioxide