Urban−rural gradients reveal joint control of elevated CO₂ and temperature on extended photosynthetic seasons - Wang, Songhan (Nanjing University. International Institute for Earth System Science) ; Ju, Weimin (Nanjing University. International Institute for Earth System Science) ; Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals) ; Cescatti, Alessandro (European Commission, Joint Research Centre (Ispra, Itàlia)) ; Zhou, Yuyu (Iowa State University. Department of Geological and Atmospheric Sciences) ; Fu, Yongshuo H.. (Beijing Normal University. College of Water Sciences) ; Huete, Alfredo (University of Technology Sydney. School of Life Sciences) ; Liu, Min (East China Normal University. School of Ecological and Environmental Sciences) ; Zhang, Yongguang (Nanjing University. International Institute for Earth System Science)