Network-at-a-Glance

Sites

• Sites registered in AmeriFlux 809
• Sites that have downloadable flux data 571
• Site years of downloadable AmeriFlux BASE data 4272
• Site years of downloadable AmeriFlux FLUXNET data 2166
• Number of AmeriFlux Core Sites 43
• Number of Registered AmeriFlux Sites by Year
Show Chart Data

Years	Number of AmeriFlux Sites
1991	1
1993	2
1994	3
1995	4
1996	6
1997	12
1998	16
1999	25
2000	30
2001	47
2002	60
2003	68
2004	88
2005	98
2006	103
2007	120
2008	121
2009	124
2011	125
2012	126
2013	168
2014	207
2015	232
2016	260
2017	299
2018	385
2019	471
2020	521
2021	558
2022	589
2023	636
2024	689
2025	793
2026	809

• Five most recent sites to join the Network

Site ID	Join Date
US-Ha3	2026/02/11
US-LCW	2026/02/05
US-SBR	2026/02/05
US-BNF	2026/02/02
CA-ST1	2026/01/26

Geography

• Sites by country

Country	Site Count
Argentina	7
Brazil	23
Canada	89
Chile	5
Colombia	2
Costa Rica	5
Mexico	16
Panama	2
Peru	5
Puerto Rico	2
USA	653

• Sites in each IGBP landcover
Show Chart Data

IGBP	Site Count
Barren Sparse Vegetation	9
Closed Shrublands	15
Cropland/Natural Vegetation Mosaics	20
Croplands	193
Deciduous Broadleaf Forests	60
Deciduous Needleleaf Forests	1
Evergreen Broadleaf Forests	20
Evergreen Needleleaf Forests	113
Grasslands	113
Mixed Forests	20
Open Shrublands	50
Permanent Wetlands	130
Savannas	10
Snow and Ice	1
Urban and Built-Up Lands	24
Water Bodies	15
Woody Savannas	15

Registered AmeriFlux Members

• AmeriFlux members 22917
• New AmeriFlux members in the past year 3417

Downloads of AmeriFlux BASE flux data since November, 2015
(from ameriflux.lbl.gov)

• Total unique downloads 69024
• AmeriFlux sites whose data have been downloaded 571
• Users who have downloaded AmeriFlux BASE flux data 7833
• How do people use the AmeriFlux BASE flux data?
Show Chart Data

Intended Use	Use Count
Education (Teacher or Student)	9912
Other	5285
Research - Land model/Earth system model	26712
Research - Multi-site synthesis	7387
Research - Other	8846
Research - Remote sensing	10882

Downloads of AmeriFlux FLUXNET data since September, 2021
(from ameriflux.lbl.gov)

• Total unique downloads 15248
• AmeriFlux sites whose data have been downloaded 300
• Users who have downloaded AmeriFlux FLUXNET data 4054
• How do people use the AmeriFlux FLUXNET data?
Show Chart Data

Intended Use	Use Count
Other	2779
Research - Other	1078
Research - Remote sensing	3537
Education (Teacher or Student)	3172
Research - Multi-site synthesis	2538
Research - Land model/Earth system model	2144

Downloads of FLUXNET2015 data since January, 2016
(from fluxnet.org)

• Total unique downloads 45507
• AmeriFlux sites whose data have been downloaded 86
• Users who have downloaded FLUXNET2015 data for AmeriFlux sites 9627
• How do people use the FLUXNET2015 data?
Show Chart Data

Intended Use	Use Count
Education (Teacher or Student)	9954
Other	5418
Research - Land model/Earth system model	8449
Research - Multi-site synthesis	6962
Research - Other	2991
Research - Remote sensing	11733

AmeriFlux Data & Data Processing

• AmeriFlux BASE Site Years Availability
Show Chart Data

Years	Published	Pending QA/QC
1991	1	0
1992	1	0
1993	1	0
1994	5	0
1995	7	0
1996	10	0
1997	19	0
1998	26	1
1999	36	1
2000	43	1
2001	66	0
2002	83	2
2003	96	2
2004	119	3
2005	128	4
2006	121	5
2007	125	9
2008	137	11
2009	142	13
2010	144	15
2011	146	13
2012	151	16
2013	159	28
2014	167	27
2015	177	33
2016	191	30
2017	234	22
2018	247	21
2019	262	12
2020	240	16
2021	241	20
2022	226	24
2023	228	27
2024	215	28
2025	78	30

• AmeriFlux BASE Site Years Available by IGBP
Show Chart Data

Years	BSV	CRO	CSH	CVM	DBF	DNF	EBF	ENF	GRA	MF	OSH	SAV	SNO	URB	WAT	WET	WSA
1991	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0
1992	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0
1993	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0
1994	0	0	0	0	2	0	0	1	0	0	0	0	0	0	0	2	0
1995	0	0	0	0	3	0	0	1	0	1	0	0	0	0	0	2	0
1996	0	1	0	0	4	0	0	3	0	1	0	0	0	0	0	1	0
1997	0	2	2	0	4	0	1	7	2	1	0	0	0	0	0	0	0
1998	0	2	2	0	5	0	1	10	3	1	0	0	0	0	0	2	0
1999	0	2	3	0	6	0	2	15	2	2	0	0	0	0	0	4	0
2000	0	2	3	0	8	0	2	17	4	2	0	0	0	0	0	5	0
2001	0	4	3	0	9	0	3	29	6	3	3	0	0	0	0	5	1
2002	0	4	3	0	13	0	3	38	8	3	5	0	0	0	0	5	1
2003	0	5	4	0	13	0	3	44	9	4	5	1	0	0	0	7	1
2004	0	8	6	0	16	0	5	47	15	5	5	1	0	0	0	9	2
2005	0	11	7	0	15	0	4	49	18	5	6	1	0	0	0	9	3
2006	1	11	7	0	15	0	4	40	20	5	6	1	0	0	0	8	3
2007	1	12	3	0	16	0	4	40	22	6	9	2	0	0	0	7	3
2008	1	15	2	1	16	0	4	40	22	6	14	1	0	0	1	9	5
2009	1	19	2	1	14	0	4	38	27	5	12	4	0	0	1	10	4
2010	1	18	2	1	14	0	4	42	25	5	13	4	0	0	1	10	4
2011	3	22	2	1	14	0	3	30	22	5	14	4	0	0	1	20	5
2012	3	23	2	1	15	0	4	29	24	5	14	4	1	0	2	19	5
2013	3	27	1	1	15	0	4	30	22	5	14	4	1	1	3	23	5
2014	4	25	4	1	14	1	6	29	23	5	16	4	1	0	3	26	5
2015	3	30	4	5	14	1	6	30	24	4	14	4	1	0	2	30	5
2016	3	31	4	5	22	0	6	30	28	3	13	4	1	0	3	33	5
2017	3	35	4	7	33	0	5	36	36	5	18	4	1	2	4	36	5
2018	2	37	4	6	28	0	5	44	39	6	17	3	1	4	4	43	4
2019	2	39	4	6	37	0	5	47	38	6	16	3	1	5	4	45	4
2020	2	43	4	4	26	0	6	43	32	6	15	3	1	4	4	43	4
2021	3	48	5	3	26	0	6	41	31	7	14	2	1	5	2	43	4
2022	2	36	5	3	23	0	5	41	28	6	14	2	1	4	2	50	4
2023	1	46	5	3	23	0	4	39	25	6	13	2	1	4	1	50	5
2024	2	43	1	4	22	0	3	36	30	7	9	2	0	5	2	44	5
2025	0	16	1	0	5	0	0	14	6	5	5	1	0	1	1	19	4