History of Radiocarbon year

	Revision 2 . . December 16, 2001 9:26 pm by Hagedis
	Revision 1 . . December 16, 2001 9:24 pm by Hagedis

---

Difference (from prior major revision) (no other diffs)

Changed: 1c1,3

radiocarbon year - radiocarbon dating for now.

Raw radiocarbon measurements are usually reported as years "before present" (BP). This is the number of radiocarbon years before 1950, based on the assumption that the level of carbon-14 in the atmosphere has always been at the 1950 level. Because this is untrue in practice, radiocarbon years do not correspond exactly to calendar years. See radiocarbon dating for more information.