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TDE Data

Data aquisition policy
Information about data marked 'to be added' in the following list can be requested from the listed investigator. 
Our plan it to make all project data available once the primary publications for specific data sets are in press or published.

A permanent TDE Data Archive is located at CDIAC

Core Project Data Sets and Primary References

  • 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

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 D.E. Todd)
  • Organic-layer mass and element content (1992, 1998, 1999, 2002, 2004, 2006)
  • Mineral soil element content (1992 pre-treatment; 2006 post-treatment)
  • Lysimeter nutrient data (to be added D.W. 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.
  • Multi-factor Simulations For the Walker Branch Forest
  • Hanson PJ, Wullschleger SD, Norby RJ, Tschaplinski TJ, Gunderson CA (2005) Importance of changing CO2, temperature, precipitation, and ozone on carbon and water cycles of an upland oak forest: incorporating experimental results into model simulations. Global Change Biology 11:1402-1423. [Paper]
  • INTRASTAND STELLA Model used in the paper [Stella model]

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).