Geoengineering: A Potential Biochar Application?
Higher temperature and decompo- sition rates can also increase nutrient availability, which often has a greater effect on plant growth than temperature (Chapin and Shaver 1996). Decomposition of soil C (in- cluding thawed permafrost C) with concomitant nutrient release could actually increase total ecosystem C storage if low C:N soil organic matter is replaced by higher C:N plant biomass (Shaver et al. 2000). http://www.aibs.org/bioscience-press-releases/resources/Schuur.pdf
Biochar can be used as a soil amendment to improve yield, improve water quality, reduce soil emissions of greenhouse gases, reduce nutrient leaching, reduce soil acidity, and reduce irrigation and fertilizer requirements http://en.wikipedia.org/wiki/Biochar
The Intergovernmental Panel on Climate Change (IPCC) reported Biochar as a key technology for reaching low carbon dioxide atmospheric concentration targets. The negative emissions that can be produced by Bio-energy with carbon capture and storage (BECCS) has been estimated by the Royal Society to be equivalent to a 50 to 150 ppm decrease in global atmospheric carbon dioxide concentrations. Annual net emissions of carbon dioxide (CO2), methane and nitrous oxide could be reduced by a maximum of 1.8 Pg CO2-C equivalent (CO2-Ce) per year (12% of current anthropogenic CO2-Ce emissions; 1 Pg=1 Gt), and total net emissions over the course of a century by 130 Pg CO2-Ce, without endangering food security, habitat or soil conservation. Wikipedia
Related Nitrous oxide emission reduction in temperate biochar-amended soil (2011) – Climate Change Mitigation from Pyrolysis – – Beaulieu and Tank suggest that reductions in nitrous oxide emissions from stream and river networks can be achieved through changes in urban and agricultural land use patterns, such as reduced agricultural fertilizer application.