TDE Data

Data aquisition policy

A permanent TDE Data Archive is located at CDIAC

Site location
• Latitude  35° 58.002' N
• Longitude 84° 16.888' W
• Elevation  250 to 334 m

TDE/Walker Branch Land Use History

System Performance Data
• Summary of system performance from 1993-1996 (PDF file)
• Soil water data 1993 through 2005
  
• Microclimate
• Litter layer temperature by time and treatment 
• Soil temperatures by time and depth


Weather data (available for the years shown)

• TDE Monthly (1993-2006)
• TDE Daily (1993-2006)
• TDE Hourly (1993-2006)
• Walker Branch Hourly, Above-Canopy Temperatures 1993-2000


Species composition via annual surveys of survival and diameter

• Trees >10 cm dbh
• Saplings <10 cm dbh > 1 m tall
• Seedlings and plants < 2 m tall (to be added, M. Huston and M. Holmgren)
• Seedling recruitment (may be added J. F. Weltzin)


Growth

• Mature tree Annual Growth 1993-2000
• Sapling Annual Growth 1994-2000
• Root density
• Biomass sampling data (to be added, J. D. Joslin and M. Wolfe)
  
• Seasonal patterns of relative leaf area index
• Annual Litter Mass (to be added, P. Hanson)


Physiology

• Foliar photosynthesis and conductance
• Net photosynthesis and conductance (to be added P. Hanson and K. Wilson) 
• Foliar conductance (may be added R. Auge)
• Leaf N content
• Seasonal patterns (to be added P. Hanson, T. Tschaplinski, and K. Wilson) 
• Treatment effects (to be added T. Tschaplinski)
• Leaf water potential (to be added T. Tschaplinski, M. Gebre)
• Leaf osmotic potential (to be added T. Tschaplinski, M. Gebre)
• Foliar respiration (to be added N. Edwards)
• Stem/bole respiration
• Whole-plant water use via sapflow measurements ( to be added S. Wullschleger)
• Stand-level Water Use in 2000
  
Sapling data (1995, 1998, 1999, 2000)
• Nonstructural carbohydrates (to be added T. Tschaplinski)


Decomposition

• Litter decomposition (to be added P. Hanson)
• Soil respiration
• Total soil respiration 
• Litter layer respiration (to be added P. Hanson) 
• Root contributions to soil respiration (to be added P. Hanson)
• Coarse wood decomposition  (to be added, P. Hanson)

Nutrient cycling
• Litter nutrient content (to be added E. O'Neill)
• Mineral soil element content (to be added D. Todd)
• Organic Layer element content (to be added)
• Lysimeter nutrient data (to be added D. Johnson)
• Shallow lysimeters (25 cm) 
• Deep lysimeters (70 cm) 
• Resin lysimeters (organic layer)
  


Stand level carbon cycle components (calculated stand level values (to be added P. Hanson)
• Net ecosystem carbon exchange -- NEE
• Net primary production -- NPP
• Gross primary production -- GPP
• Leaf, stem, and soil/root respiration
• Evapotranspiration, transpiration, evaporation, and drainage.

Related Data Other Sources

Armillaria fungi (may be added J. Bruhn)

Atmospheric Deposition and Air Quality

• NADP/NTN Monitoring Location TN00 (Clicking here will take you out of the WBW server)
• Ambient Air Pollutant data can be found through the EPA AIRS database.


Alternate climate data

• NOAA/Oak Ridge, TN Climate Data
• Drought indicies
• PDSI - Palmer Drought Severity Index 1993-2000 (to be added)
• CMI - Crop Moisture index 1993-2000 (to be added)
• Drought Monitor index May, 1999 - 2000 (to be added)


Hebivory and Foliar Chemistry (may be added D. Shure).