Articles | Volume 13, issue 3
Biogeosciences, 13, 873–885, 2016
https://doi.org/10.5194/bg-13-873-2016
Biogeosciences, 13, 873–885, 2016
https://doi.org/10.5194/bg-13-873-2016

Research article 17 Feb 2016

Research article | 17 Feb 2016

The 2009–2010 step in atmospheric CO2 interhemispheric difference

R. J. Francey and J. S. Frederiksen

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Latest update: 26 Jul 2021
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Short summary
A step in the annual average CO2 difference between Mauna Loa and the Southern Hemisphere of 0.8 ppm in 2009–2010 has no precedence in 50 years. Variations in interhemispheric exchange coincide with the step, the subsequent 5-year north-south CO2 stability, and historic differences. This behaviour provides a critical test for studies that employ atmospheric transport models to interpret global carbon budgets and inform management of anthropogenic emissions.
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