The 2009–2010 step in atmospheric CO2 interhemispheric difference
| Autor: | Francey, R. J., Frederiksen, J. S. |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Biogeosciences, Vol 13, Iss 3, Pp 873-885 (2016) |
| ISSN: | 1726-4189 1726-4170 |
| Popis: | The annual average CO2 difference between baseline data from Mauna Loa and the Southern Hemisphere increased by ∼ 0.8 µmol mol−1 (0.8 ppm) between 2009 and 2010, a step unprecedented in over 50 years of reliable data. We find no evidence for coinciding, sufficiently large source and sink changes. A statistical anomaly is unlikely due to the highly systematic nature of the variation in observations. An explanation for the step, and the subsequent 5-year stability in this north–south difference, involves interhemispheric atmospheric exchange variation. The selected data describing this episode provide a critical test for studies that employ atmospheric transport models to interpret global carbon budgets and inform management of anthropogenic emissions. |
| Databáze: | OpenAIRE |
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