Temporal Variations (IMAGE)

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Temporal Variations

Caption

This graph shows temporal variations in the atmospheric CO2 concentration at Syowa Station, Antarctica (blue) and Ny-Ålesund, Svalbard (red). Dots, thick lines, and thin lines indicate the observed values, best-fitted curves, and long-term trends, respectively. Seasonal variations at the Arctic are larger than those at the Antarctic region because the terrestrial biosphere consumes atmospheric CO2 via photosynthesis and its effect is stronger in the northern hemisphere than in the southern hemisphere.

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National Institute of Polar Research and Tohoku University

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