Walker Branch Throughfall Displacement Experiment Data Report, CDIAC/NDP-078A

This numeric data package provides data sets, and accompanying documentation, on site characterization, system performance, weather, species composition, and growth for the Throughfall Displacement Experiment (TDE). Funded by the U.S. Department of Energy, TDE was established in the Walker Branch Watershed (WBW) in eastern Tennessee to provide data on the responses of forests to altered precipitation regimes. The specific data sets include soil water content and potential, coarse fraction of the soil profile, litter layer temperature, soil temperature, monthly weather, daily weather, hourly weather, species composition of trees and saplings, mature tree and sapling annual growth, and relative leaf area index.

References
Drungil, C. E. C., K. Abt, and T. J. Gish. 1989. Soil moisture determination in gravelly soils with time domain reflectometry. Transactions Am. Soc. Agric. Eng. 32:177-180.

Hanson, P. J., D. E. Todd, and J. S. Amthor. 2001. A six-year study of sapling and large-tree growth and mortality responses to natural and induced variability in precipitation and throughfall. Tree Physiology 21:345-358.

Hanson, P. J., D. E. Todd, M. A. Huston, J. D. Joslin, J. L. Croker, and R. M. Auge. 1998. Description and field performance of the Walker Branch Throughfall Displacement Experiment: 1993-1996. ORNL/TM-13586. Oak Ridge National Laboratory, Oak Ridge, Tennessee.

Hanson, P. J., and J. F. Weltzin. 2000. Drought disturbance from climate change: Response of United States forests. Science of the Total Environment 262:205-220.

Hutchinson, B. A., and D. D. Baldocchi. 1989. Forest meteorology,pp. 21-95. In D. W. Johnson and R. I. Van Hook (eds.), Analysis of Biogeochemical Cycling Processes in Walker Branch Watershed, Springer-Verlag, New York.

Joslin, J. D., M. H. Wolfe, and P. J. Hanson. 2000. Effects of altered water regimes on forest root systems. New Phytologist 147:117-129.

Keeland, B. D., and R. R. Sharitz. 1993. Accuracy of tree growth measurements using dendrometer bands. Canadian Journal of Forestry Research 23:2454-2457.

McLaughlin, S. B., and D. J. Downing. 1996. Interactive effects of control ozone and climate measured on growth of mature loblolly pine trees. Canadian Journal of Forestry Research 26:670-681.

Topp, G. C., and J. L. Davis. 1985. Measurement of soil water content using time domain reflectometry (TDR): A field evaluation. Soil Science Society of America Journal 49:19-24.