The Duke Forest FACE site operates as a DOE User Facility. Core funding for the User Facility has been provided by the Office of Science (BER), U.S. Department of Energy.
User Facility Statistics
| Month | Scheduled Hours |
Operating Hours |
Operating Time (% of Scheduled) |
On-site Primary Users |
On-site Post-Docs and Grads |
Data Status |
| June, 2008 | 466.0 | 462.8 | 99.3% | 11 | 5 | Final |
| May, 2008 | 466.3 | 465.7 | 99.9% | 12 | 7 | Final |
| April, 2008 | 412.9 | 409.3 | 99.1% | 11 | 8 | Final |
| March, 2008 | 339.2 | 336.2 | 99.1% | 13 | 8 | Final |
| February, 2008 | 225.5 | 225.0 | 99.8% | 8 | 6 | Final |
| January, 2008 | 177.5 | 177.3 | 99.9% | 9 | 4 | Final |
| 2007 | 4236.7 | 4208.3 | 99.3% | 25 | 21 | Final |
| 2006 | 4385.9 | 4355.3 | 99.3% | 26 | 28 | Final |
| 2005 | 4124 | 4114 | 99.8% | 47 | 58 | Final |
| 2004 | 4161 | 4146 | 99.6% | 31 | 37 | Final |
| Partial 2003 | 779 | 776 | 99.6% | 15 | 18 | Final |
Notes
Scheduled hours are the total number of daylight hours (solar altitude > -6°) when ambient temperature was > 5° C and average wind speeds just above the canopy were < 5 m sec-1. Occasional periods when the CO2 was deliberately turned off for specific scientific studies are excluded from these totals.Operating hours are scheduled hours when the CO2 exposure system was adding CO2 to the treatment plots, averaged across all treatment plots.
On-site users are the number of principal investigators and co-investigators who were physically present at the FACE site in the given month, or who had technicians, post-docs, and graduate students working on the site. The tally does not include investigators analyzing samples or data from the site in their home laboratory.