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

M. Heimann
2014 Earth System Dynamics  
<p><strong>Abstract.</strong> Becker et al. (2013) argue that an afforestation of 0.73 × 10<sup>9</sup> ha with <i>Jatropha curcas</i> plants would generate an additional terrestrial carbon sink of 4.3 PgC yr<sup>−1</sup>, enough to stabilise the atmospheric mixing ratio of carbon dioxide (CO<sub>2</sub>) at current levels. However, this is not consistent with the dynamics of the global carbon cycle. Using a well-established global carbon cycle model, the effect of adding such a hypothetical
more » ... h a hypothetical sink leads to a reduction of atmospheric CO<sub>2</sub> levels in the year 2030 by 25 ppm compared to a reference scenario. However, the stabilisation of the atmospheric CO<sub>2</sub> concentration requires a much larger additional sink or corresponding reduction of anthropogenic emissions.</p>
doi:10.5194/esd-5-41-2014 fatcat:lpjfc2ssdzbs3cuovmxjcw5uce