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Journal Article

Comment on “Carbon farming in hot, dry coastal areas: an option for climate change mitigation” by Becker et al. (2013)

MPS-Authors
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Heimann,  Martin
Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society;

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BGC2086.pdf
(Publisher version), 140KB

BGC2086D.pdf
(Publisher version), 684KB

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Citation

Heimann, M. (2014). Comment on “Carbon farming in hot, dry coastal areas: an option for climate change mitigation” by Becker et al. (2013). Earth System Dynamics, 5, 41-42. doi:10.5194/esd-5-41-2014.


Cite as: http://hdl.handle.net/11858/00-001M-0000-001A-26E8-7
Abstract
Becker et al. (2013) argue that an afforestation of 0.73×109 ha with Jatropha curcas plants would generate an additional terrestrial carbon sink of 4.3 PgC yr−1, enough to stabilise the atmospheric mixing ratio of carbon dioxide (CO2) at current levels. However, this is not consistent with the dynamics of the global carbon cycle. Using a wellestablished global carbon cycle model, the effect of adding such a hypothetical sink leads to a reduction of atmospheric CO2 levels in the year 2030 by 25 ppm compared to a reference scenario. However, the stabilisation of the atmospheric CO2 concentration requires a much larger additional sink or corresponding reduction of anthropogenic emissions.