Climate models predict that increasing greenhouse gas levels will invigorate the circulation in the upper atmosphere. But a close look at observations of the age of stratospheric air over 30 years reveals no acceleration in the circulation.
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Waugh, D. The age of stratospheric air. Nature Geosci 2, 14–16 (2009). https://doi.org/10.1038/ngeo397
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DOI: https://doi.org/10.1038/ngeo397
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