Precipitation manipulation experiments are documenting ecological effects of chronic increase or decrease in rainfall. These studies are providing vital knowledge about effects of changing precipitation on the structure and functioning of ecosystems, as well as ecosystems' regional-scale regulation of weather and climate.
Credit or Source: Oak Ridge National Laboratory
US DOE. May 2010. Terrestrial Ecosystem Science: Climate and Environmental Sciences Division, US Department of Energy Office of Science. (p. 1) (website)