| Instrumentation Summary for Ameriflux 26m Tower (also called the "CU Tower"). | ||||||
| For Detailed Information go to the CU Ameriflux FTP site: ftp://ftp@urquell.colorado.edu/pub/Documentation/ For a webpage with links to many manufacturers try NCAR/ATD ISSF | ||||||
| Variable Name | Description | Units | Location | Sample Rate | Sensor | Notes |
|---|---|---|---|---|---|---|
| co2, h2o | CO2/H2O mixing ratio | mg/m^3, g/m^3 | 21.5m (inlet) | 10-hz | Li-Cor 6262 | closed path IR gas analyzer |
| ws, wd, tc | Wind Speed, Direction, Virtual Temperature (sonic) | m/s, deg | 13.5-21.5m (varied) | 10-20hz (varied) | Applied Technologies, ATI-K Probe | On ~1.5m boom |
| ws, wd, tc | Wind Speed, Direction, Virtual Temp (sonic) | m/s, deg | 21.5m | 10-hz | Campbell Scientific, CSAT-3 | On ~2m boom |
| WS, WD | Wind Speed and Direction | m/s, deg | 25.5m | 1-hz | RM Young 09101 Propvane | |
| CO2 | CO2 mixing ratio | ppm | 1, 3, 6, 10, 21.5m (variable) | 1-hz | Li-Cor 6251 | closed path, located at the 7m level on the tower. |
| CO2 | CO2 mixing ratio | ppm | 1, 3, 6, 10, 21.5m (variable) | 1-hz | Li-Cor 7000 | closed path, this is a redundant measurement of the LiCor 6251, USGS collects these data--the Li7000 is located about 75m West of the CU tower. |
| T, RH | Temperature, Rel. Humidity | C, % | 2m, 8m, 21.5m | 1-hz | Vaisala HMP35-D | |
| P | Barometric Pressure (absolute) | mb | 18m | 1-hz | Vaisala (PT101-B) | |
| Rnet | Net Radiation | W/m^2 | 25.5m (variable) | 1-hz | Micromet Systems, Q*7,1 | |
| Rsw.in | Incoming Shortwave | W/m^2 | 25.5m (Upward Looking) | 1-hz | Kipp and Zonen, CNR-1 | On ~2m boom, 0.3-3 micron |
| Rsw.out | Outgoing Shortwave | W/m^2 | 25.5m (Downward Looking) | 1-hz | Kipp and Zonen, CNR-1 | On ~2m boom, 0.3-3 micron |
| Tc.in, Td.in, Rp.in | Incoming Longwave Radiation | degC, W/m^2 | 25.5m | 1-hz | Kipp and Zonen, CNR-1 | On ~2m boom, 5-50 micron, Tc=Case Temperature, Td=Dome Temperature, Rp=Thermopile Output |
| Tc.out, Td.out, Rp.out | Outgoing Longwave Radiation | degC, W/m^2 | 25.5m | 1-hz | Kipp and Zonen, CNR-1 | On ~2m boom, 5-50 micron, Tc=Case Temperature, Td=Dome Temperature, Rp=Thermopile Output |
| PAR | Photosynthetically Active Radiation | micromol m^-2 s^-1 | 25.5m | 1-hz | Li-Cor, Li-190SA | silicon photodiode, 0.4-0.7 microns |
| rainr | Rain Rate | mm | 10.5m | 1-hz | Met One, #385-L | heated tipping bucket |
| wetness | Wetness | 0 or 1 | 13.5m | 1-hz | Campbell Scientific, 237-L | circuit board which detects wetness |