1. Duke Face Project By the Tree Folk: Brendan McMahon, Andrew Lomax, Helen Zhang, Allen Yang

2. About the Duke Forest FACE facility The Forest Atmosphere Carbon Transfer and Storage (FACTS-I) facility is in the Blackwood Division of Duke Forest. The facility has 12 FACE rings that monitor elevated atmospheric CO 2 concentration, ambient CO 2 control, elevated soil nutrients and CO 2 X soil nutrient enrichment. The system has been running since June 1994 as a prototype plot. In August 1996 three additional plots were started and the remaining plots were partitioned in January 2005. FACE stands for Free-Air-CO 2 -Enrichment

3. Experiments done at the FACE facility Many experiments have been done at this facility on a wide range of topics. These topics include, but are not limited to: forest structure, the forest ecosystem, cycling of material through the forest, forest microbes and forest physiology. The influence of CO 2 on these topics is the main focus of their research.

4. Research Site Blackwood division of the Duke Forest near Chapel Hill. Clear-cut/Burned in 1983 Replanted with Loblolly pines Mostly clay soil, soil pH, nitrogen, and phosphorus are mid-range for pines. 90 hectares (220 acres, 0.3 sq mi)

6. Enrichment Carbon Dioxide added via tubes 200 micromoles (millionth of a mole) Fertilized by hand Ammonium nitrate

8. Instruments Mostlu made up of: Lysimeter Litter bags/traps Minirhizotron TDR sensor Throughfall trap Watermark sensor Tower

9. Recent Publications http://www.fao.org/DOCREP/ARTICLE/WFC/XI I/0515-B4.HTM http://www.fao.org/DOCREP/ARTICLE/WFC/XI I/0515-B4.HTM The above is “Using process-based models to estimate forest productivity for management purposes”, their most recent publication(in print now) Hundreds of different publications, all about trees/forests in some way. They’ve given hundreds of presentations too.

10. Sources Cited http://face.env.duke.edu/main.cfm http://www.fao.org/DOCREP/ARTICLE/WFC/XI I/0515-B4.HTM http://www.fao.org/DOCREP/ARTICLE/WFC/XI I/0515-B4.HTM