Ramzi TOUCHAN is a Research Professor in the Laboratory of Tree-Ring Research and a Professor in the School of Natural Resources and Environment at the University of Arizona. His field of expertise is developing long tree-ring chronologies to reconstruct past climate in different parts of the world.
Current research programs include establishing a multi-century network of climate records for the eastern Mediterranean and North Africa based on tree rings by extending and enhancing existing tree-ring datasets, and by developing new tree-ring chronologies geographically and temporally. This network is being used to study inter-annual to century scale climate fluctuations in the region and their links to large-scale patterns of climate variability.
David M. MEKO is a Research Professor in the Laboratory of Tree-Ring Research and a Professor in the School of Natural Resources at the University of Arizona. He uses tree-ring data and instrumental data to study the natural variability of climatic and hydrologic systems on spatial scales from small watersheds to continents.
He has developed extended records of stream flow for water resources agencies in the western United States. Current research topics include riparian dendrochronology, the improvement of quantitative methods for stream-flow reconstruction, and estimation of the streamflow records in the Sierra Nevada of California.