Evaluating high-frequency solar-induced chlorophyll fluorescence and photochemical reflectivity as improved proxies for photosynthesis and associated water stress effect in dryland ecosystems

Xian Wang1, Dong Yan1, Russell L Scott2, Joel A Biederman2, John F Knowles2 and William Kolby Smith1, (1)University of Arizona, School of Natural Resources and the Environment, Tucson, AZ, United States, (2)USDA-ARS, Southwest Watershed Research Center, Tucson, AZ, United States