Table 4. Coefficient of variation (CV) of ET at flux sites with over 3 years' observations.

Forest type	Location	Mean annual ET (mm)	CV (%)	Observation period	Source
Boreal deciduous coniferous	62°15′18″N, 129°14′29″E	196.1	10	1998–2006	[37]
Boreal broadleaved deciduous	53°37′48″N, 106°11′24″W	405	21	1998–2006	[36]
Boreal coniferous	53°59′24″N, 105°7′12″W	374	9	1998–2006	[36]
	53°55′12″N, 104°41′24″E	300	7	1998–2006
Temperate broadleaved deciduous	36°58′41″N, 79°05′39″W	633	4.1	2002–2005	[41]
Temperate broadleaved deciduous	35°57′30″N, 84°17′15″W	567.2	13	1995–1997	[31]
Temperate coniferous	34°58′N, 136°00′E	729	4.4	2001–2003	[39]
Subtropical coniferous	26°44′29″N, 115°03′29″E	787	13.1	2003–2010	This study
Tropical rainforest	21°55′39″N, 101°15′55″E	1029	2.8	2003–2006	[20]
	4°20′N, 113°50′E	1323	5.6	2000–2009