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Spatial Changes in the Seasonal Mixing Proportions of Available Soil Moisture in the High Elevations of Arizona and New Mexico
Presented by Dr. William WRIGHT on 17 May 2013 from 11:30 to 11:50
Type: Oral Presentation
Session: Isotopes in Dendrochronology II
Track: Isotopes in dendrochronology
The North American Monsoon dominates climate in the U. S. Southwest, with discrete cool season and warm season phases. North American Monsoon forcings influence ecosystem synchronization in the U.S. southwest, yet spatial information is almost nonexistent about shifts in the proportions of cool season and warm season precipitation in soil moisture available for plant growth. The influence of the warm season phase of the monsoon weakens from south to north, with little warm season precipitation occurring in many years in the north, but with enhanced persistence of cool season-derived soil moisture later into the year. Similar changes are noted with elevation increase. Analyses of the presence and intensity of false latewood bands and subannual analyses of the δ18O in the tree cellulose along latitudinal and elevational transects potentially can indicate spatial and temporal patterns in seasonal moisture availability. Here we present preliminary results from these analyses.
Room: Salon D
- Dr. William WRIGHT Laboratory of Tree-Ring research, The University of Arizona, Tucson, AZ 85721
- Dr. Steven LEAVITT Laboratory of Tree-Ring Research, The University of Arizona, Tucson, AZ 85721
- Dr. Connie WOODHOUSE School of Geography and Development, The University of Arizona, Tucson, AZ 85721
- Dr. Russell MONSON School of Natural Resources and Environment Biological Sciences East, The University of Arizona, Tuscon, AZ 85721