The Network-at-a-Glance page displays summary statistics about the AmeriFlux network, its flux tower sites, data sets, and user community. This provides a useful snapshot to PIs, Program Managers, data users, and others.
Last update: Jun 28, 2026 5:30PM PST
Sites
- Sites registered in AmeriFlux 832
- Sites that have downloadable flux data 590
- Site years of downloadable AmeriFlux BASE data 4408
- Site years of downloadable AmeriFlux FLUXNET data 3125
- 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 | 5 |
| 1997 | 11 |
| 1998 | 14 |
| 1999 | 23 |
| 2000 | 28 |
| 2001 | 45 |
| 2002 | 58 |
| 2003 | 65 |
| 2004 | 86 |
| 2005 | 95 |
| 2006 | 100 |
| 2007 | 118 |
| 2008 | 120 |
| 2009 | 123 |
| 2011 | 126 |
| 2012 | 127 |
| 2013 | 170 |
| 2014 | 209 |
| 2015 | 234 |
| 2016 | 261 |
| 2017 | 300 |
| 2018 | 385 |
| 2019 | 471 |
| 2020 | 521 |
| 2021 | 558 |
| 2022 | 589 |
| 2023 | 636 |
| 2024 | 689 |
| 2025 | 793 |
| 2026 | 832 |
- Five most recent sites to join the Network
| Site ID | Join Date | | CA-CQ2 | 2026/05/28 |
| CA-CQ3 | 2026/05/28 |
| PE-IGP | 2026/05/22 |
| US-NYg | 2026/05/08 |
| US-NYi | 2026/05/08 |
Geography
- Sites by country
| Country | Site Count | | Argentina | 7 |
| Brazil | 23 |
| Canada | 92 |
| Chile | 5 |
| Colombia | 2 |
| Costa Rica | 5 |
| Mexico | 16 |
| Panama | 2 |
| Peru | 6 |
| Puerto Rico | 2 |
| USA | 672 |
- Sites in each IGBP landcover
Show Chart Data| IGBP | Site Count | | Barren Sparse Vegetation | 9 |
| Closed Shrublands | 15 |
| Cropland/Natural Vegetation Mosaics | 20 |
| Croplands | 205 |
| Deciduous Broadleaf Forests | 60 |
| Deciduous Needleleaf Forests | 1 |
| Evergreen Broadleaf Forests | 20 |
| Evergreen Needleleaf Forests | 113 |
| Grasslands | 118 |
| Mixed Forests | 20 |
| Open Shrublands | 50 |
| Permanent Wetlands | 132 |
| Savannas | 10 |
| Snow and Ice | 1 |
| Urban and Built-Up Lands | 27 |
| Water Bodies | 16 |
| Woody Savannas | 15 |
Registered AmeriFlux Members
- AmeriFlux members 24122
- New AmeriFlux members in the past year 3420
Downloads of AmeriFlux BASE flux data since November, 2015
(from ameriflux.lbl.gov)
- Total unique downloads 78002
- AmeriFlux sites whose data have been downloaded 590
- Users who have downloaded AmeriFlux BASE flux data 8214
- How do people use the AmeriFlux BASE flux data?
Show Chart Data| Intended Use | Use Count | | Education (Teacher or Student) | 10276 |
| Other | 6848 |
| Research - Land model/Earth system model | 27137 |
| Research - Multi-site synthesis | 7786 |
| Research - Other | 14120 |
| Research - Remote sensing | 11835 |
Downloads of AmeriFlux FLUXNET data since September, 2021
(from ameriflux.lbl.gov)
- Total unique downloads (excl. Shuttle) 23376
- Total unique downloads via Shuttle 105546
- AmeriFlux sites whose data have been downloaded 406
- Users who have downloaded AmeriFlux FLUXNET data 4532
- How do people use the AmeriFlux FLUXNET data?
Show Chart Data| Intended Use | Use Count | | Other | 3878 |
| Research - Other | 6359 |
| Research - Remote sensing | 4080 |
| Education (Teacher or Student) | 3544 |
| Research - Multi-site synthesis | 3037 |
| Research - Land model/Earth system model | 2478 |
Downloads of FLUXNET2015 data since January, 2016
(from fluxnet.org)
- Total unique downloads 49411
- AmeriFlux sites whose data have been downloaded 86
- Users who have downloaded FLUXNET2015 data for AmeriFlux sites 10038
- How do people use the FLUXNET2015 data?
Show Chart Data| Intended Use | Use Count | | Education (Teacher or Student) | 10282 |
| Other | 8037 |
| Research - Land model/Earth system model | 8761 |
| Research - Multi-site synthesis | 7185 |
| Research - Other | 3101 |
| Research - Remote sensing | 12045 |
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 | 152 | 16 |
| 2013 | 164 | 24 |
| 2014 | 172 | 23 |
| 2015 | 184 | 27 |
| 2016 | 195 | 28 |
| 2017 | 238 | 23 |
| 2018 | 253 | 21 |
| 2019 | 268 | 14 |
| 2020 | 247 | 18 |
| 2021 | 250 | 20 |
| 2022 | 235 | 23 |
| 2023 | 239 | 24 |
| 2024 | 229 | 29 |
| 2025 | 118 | 77 |
| 2026 | 8 | 23 |
- 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 | 3 | 19 | 5 |
| 2013 | 3 | 27 | 1 | 1 | 15 | 0 | 4 | 30 | 25 | 5 | 14 | 4 | 1 | 1 | 4 | 24 | 5 |
| 2014 | 4 | 25 | 4 | 1 | 14 | 1 | 6 | 29 | 26 | 5 | 16 | 4 | 1 | 0 | 4 | 27 | 5 |
| 2015 | 3 | 30 | 5 | 5 | 15 | 1 | 6 | 30 | 27 | 4 | 14 | 4 | 1 | 0 | 3 | 31 | 5 |
| 2016 | 3 | 31 | 5 | 5 | 23 | 0 | 6 | 30 | 28 | 3 | 13 | 4 | 1 | 0 | 5 | 33 | 5 |
| 2017 | 3 | 35 | 5 | 7 | 34 | 0 | 5 | 36 | 36 | 5 | 18 | 4 | 1 | 2 | 6 | 36 | 5 |
| 2018 | 2 | 39 | 5 | 6 | 29 | 0 | 5 | 44 | 39 | 6 | 17 | 3 | 1 | 4 | 6 | 43 | 4 |
| 2019 | 2 | 41 | 5 | 6 | 38 | 0 | 5 | 47 | 38 | 6 | 16 | 3 | 1 | 5 | 6 | 45 | 4 |
| 2020 | 2 | 46 | 5 | 4 | 27 | 0 | 6 | 43 | 32 | 6 | 15 | 3 | 1 | 4 | 6 | 43 | 4 |
| 2021 | 3 | 52 | 6 | 3 | 27 | 0 | 6 | 42 | 31 | 7 | 14 | 2 | 1 | 5 | 4 | 43 | 4 |
| 2022 | 2 | 39 | 6 | 3 | 24 | 0 | 5 | 42 | 28 | 6 | 14 | 2 | 1 | 4 | 4 | 51 | 4 |
| 2023 | 1 | 49 | 6 | 3 | 24 | 0 | 4 | 40 | 26 | 6 | 13 | 2 | 1 | 4 | 3 | 52 | 5 |
| 2024 | 2 | 49 | 2 | 4 | 23 | 0 | 3 | 37 | 30 | 7 | 9 | 2 | 0 | 5 | 4 | 47 | 5 |
| 2025 | 2 | 31 | 2 | 2 | 6 | 0 | 0 | 18 | 15 | 5 | 5 | 1 | 0 | 1 | 3 | 23 | 4 |
| 2026 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 |
