A 3-years series of weekly 3-days integrated CO
2
samples analysed for
13
C/
12
C isotopic ratio is presented, as well as a 2-years continuous sample series of 1-2 weeks integration time, analysed ...for
14
C activity. The samples have been collected at the German Georg von Neumayer research station situated at the Antarctic coast at 70°s. 8°W. The
13
C measurements show a slightly decreasing trend in δ
13
C of -0.038 * 0.009‰/year as is to be expected due to the global fossil fuel CO
2
release. A significant seasonal variation is not detectable in the
13
C record. The δ
14
C activity of the atmospheric CO
2
samples is constantly lower by -11±2‰ if compared to the northern hemisphere clean air level. The opposite effect should be expected from an observed CO
2
concentration difference of about 3-4 ppm between the two hemispheres if due to
14
C free fossil fuel CO
2
. A total (supposedly regional)
14
C depletion of about -20‰, to -25‰, compared to low latitudes in the southern hemisphere, can be attributed to exchange of atmospheric C02 with low 14C surface water (Δ
14
C = - 100‰,) due to upwelling in the circum polar region between 50°s and 70°s. This effect can qualitatively be reproduced by a simple one-dimensional atmospheric model.
Group practice in Hokksund Aga, O; Hessling, S E; Jorgensen, J ...
Tidsskrift for den Norske Lægeforening,
1969-Jul-15, Letnik:
89, Številka:
14
Journal Article
Martino Cromero authore; cum indice rerum et verborum maxime insignium locupletissimo.
Martino Cromero authore; cum indice rerum et verborum maxime insignium locupletissimo.
Martino Cromero authore; ...cum indice rerum et verborum maxime insignium locupletissimo.
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