Sunday, June 03, 2012
Global Warming good for soil carbon traders
GOOD NEWS for farmers who choose to trade soil carbon offsets: Global Warming will increase soil carbon sequestration rates for decades ahead, according to a recent research results summarized by the Center for the Study of Carbon Dioxide and Global Change (CO2science.org). As the CO2 levels in the atmosphere increase, most plants increase photosynthetic rates to produce greater amounts of biomass. This leads to greater inputs of carbon to the soil from roots, root exudates and dead above-ground plant material. It’s not just about more biomass, either. CO2 enrichment typically reduces decomposition rates of dead plant materials present in soils. This phenomenon often leads to greater soil carbon sequestration. Scientists have concluded that, in spite of predicted increases in temperature, this stimulation of the below-ground carbon sequestration could exert a negative feed-back on the current rise of the atmospheric CO2 concentration. Finally, with more carbon in soils, soil structure and fertility should be improved, providing a positive feedback that further enhances plant growth and soil carbon sequestration.
Posted by Michael Kiely at 8:28 AM