A remotely sensed pigment index reveals photosynthetic phenology in evergreen conifers - Gamon, John A. (University of Nebraska-Lincoln. Center for Advanced Land Management Information Technologies.) ; Huemmrich, K. Fred (Goddard Space Flight Center) ; Wong, Christopher Y. S. (University of Toronto. Department of Biology) ; Ensminger, Ingo (University of Toronto. Department of Biology) ; Garrity, Steven (Decagon Devices, Inc.) ; Hollinger, David Y. (United States. Forest Service. Northern Research Station) ; Noormets, Asko (North Carolina State University. Departament of Forestry and Environmental Resources) ; Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)