Systematic observations of the
atmospheric CO2 concentration, and carbon and oxygen isotope ratios
of CO2 (d13C and d18O) have been maintained at Japanese Arctic Observatory
in Ny Ålesund (79°N, 12°E) and Antarctic station, Syowa (69°S, 40°E). The
interannual variations of the CO2 concentration and d13C in association with the occurrence of ENSO event were clearly observed at the both sites.
The d18O
values observed at Syowa Station showed significant increasing trend after
1999.
Author: S. Morimoto, S. Aoki, T. Nakazawa, G. Hashida, et al (mon at nipr dot ac dot jp)
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