Carbon feedback from forest soils will accelerate global warming, 26-year study projects [http://cmsenvis.cmsindia.org/resources/newspaper/details.asp?id=92772]After 26 years, the world's longest-running experiment to discover how warming temperatures affect forest soils has revealed a surprising, cyclical response: soil warming stimulates periods of abundant carbon release from the soil to the atmosphere alternating with periods of no detectable loss in soil carbon stores.