Concept information
Preferred term
TDE
Definition
- The Throughfall Displacement Experiment (TDE)involves developing models of global climate change to predict increasing levels of greenhouse gases in the atmosphere. Determined effect will be: 1. an increase in average global temperatures 2. alter regional levels of precipitation 3. increased levels of drought The experiment: Experimental manipulation of hydrologic inputs at the TDE is accomplished by intercepting throughfall in approximately 2000 subcanopy troughs (0.3 x 5 m) suspended above the forest floor on a "dry" treatment plot and transferring the throughfall across a control plot for distribution onto a "wet" treatment plot. Each plot is 80 x 80 m in size. The treatments result in a 33% decrease in precipitation reaching the forest floor on the dry plot and a corresponding increase in precipitation on the wet plot. Reductions in soil moisture on the dry plot are expected to be equivalent to the driest growing seasons of the 1980's drought which resulted in reduced tree growth of some species. The Throughfall Displacement Experiment is supported by the Program for Ecosystem Research (PER) in the DOE Office of Science, Office of Biological and Environmental Research (BER). Contact Information: Paul J. Hanson Walker Branch Project Coordinator Environmental Sciences Division Oak Ridge National Laboratory P.O. Box 2008, Building 1059 Oak Ridge, TN 37831-6422 USA hansonpj@ornl.gov Visit the TDE website at "http://www.esd.ornl.gov/programs/WBW/TDEAAAAA.HTM" [Summary provided by ORNL] (en)
Broader concept
- S - U (en)
URI
https://gcmd.earthdata.nasa.gov/kms/concept/e27a90d0-b4a3-4b47-bf1d-1d72011f6be4
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