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Articles | Volume 13, issue 3
Articles | Volume 13, issue 3
https://doi.org/10.5194/bg-13-873-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-13-873-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 13, issue 3
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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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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