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Relationships Between Large-Scale Climate Variability and CO2

PI: Amy Butler
Institution: Colorado State University
Abstract:
We have examined the observed relationships between large-scale climate variability and concentrations of atmospheric carbon dioxide (CO2) in the Southern Hemisphere. The results reveal that month-to-month variations in the rate of change of atmospheric CO2 at Palmer Station on the Antarctic Peninsula are significantly related to fluctuations in the dominant mode of Southern Hemisphere atmospheric variability, the so-called Southern Annular Mode (SAM).

Now we would like to look at the reverse problem- namely, how does increasing carbon dioxide impact the circulation in the Southern Hemisphere? Is this impact robust across all models, and why is not as robust in the Northern Hemisphere?

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