PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The dominant sources of interannual variation of the carbon sink include extreme climate events and disturbances, with droughts in 2002 and 2006 reducing U.S. net ecosystem carbon uptake by ~20% relative to a normal year, and disturbances including wildfires and hurricanes resulting in reduced carbon uptake or carbon release into the atmosphere.
http://www.w3.org/ns/prov#wasQuotedFrom
  • usda.gov