The impact of agricultural soil erosion on the global carbon cycle

dc.contributor.author	Van Oost, K	en
dc.contributor.author	Quine, TA	en
dc.contributor.author	Govers, G	en
dc.contributor.author	De Gryze, S	en
dc.contributor.author	Six, J	en
dc.contributor.author	Harden, JW	en
dc.contributor.author	Ritchie, JC	en
dc.contributor.author	McCarty, GW	en
dc.contributor.author	Heckrath, G	en
dc.contributor.author	Kosmas, C	en
dc.contributor.author	Giraldez, JV	en
dc.contributor.author	Marques Da Silva, JR	en
dc.contributor.author	Merckx, R	en
dc.date.accessioned	2014-06-06T06:47:57Z
dc.date.available	2014-06-06T06:47:57Z
dc.date.issued	2007	en
dc.identifier.issn	00368075	en
dc.identifier.uri	http://dx.doi.org/10.1126/science.1145724	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/3886
dc.subject.other	carbon	en
dc.subject.other	carbon dioxide	en
dc.subject.other	cesium 137	en
dc.subject.other	agricultural soil	en
dc.subject.other	carbon cycle	en
dc.subject.other	cesium	en
dc.subject.other	environmental impact	en
dc.subject.other	soil erosion	en
dc.subject.other	agriculture	en
dc.subject.other	air pollution	en
dc.subject.other	air pollution indicator	en
dc.subject.other	article	en
dc.subject.other	carbon cycle	en
dc.subject.other	priority journal	en
dc.subject.other	risk assessment	en
dc.subject.other	soil erosion	en
dc.title	The impact of agricultural soil erosion on the global carbon cycle	en
heal.type	journalArticle	en
heal.identifier.primary	10.1126/science.1145724	en
heal.publicationDate	2007	en
heal.abstract	Agricultural soil erosion is thought to perturb the global carbon cycle, but estimates of its effect range from a source of 1 petagram per year -1 to a sink of the same magnitude. By using caesium-137 and carbon inventory measurements from a large-scale survey, we found consistent evidence for an erosion-induced sink of atmospheric carbon equivalent to approximately 26% of the carbon transported by erosion. Based on this relationship, we estimated a global carbon sink of 0.12 (range 0.06 to 0.27) petagrams of carbon per year-1 resulting from erosion in the world's agricultural landscapes. Our analysis directly challenges the view that agricultural erosion represents an important source or sink for atmospheric CO2.	en
heal.journalName	Science	en
dc.identifier.issue	5850	en
dc.identifier.volume	318	en
dc.identifier.doi	10.1126/science.1145724	en
dc.identifier.spage	626	en
dc.identifier.epage	629	en