Emerging negative impact of warming on summer carbon uptake in northern ecosystems - Wang, Tao (Chinese Academy of Sciences. Center for Excellence in Tibetan Earth Science) ; Liu, Dan (Chinese Academy of Sciences. Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research) ; Piao, Shilong (Chinese Academy of Sciences. Center for Excellence in Tibetan Earth Science) ; Wang, Yilong (Laboratoire des Sciences du Climat et de l'Environnement) ; Wang, Xiaoyi (Chinese Academy of Sciences. Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research) ; Guo, Hui (Chinese Academy of Sciences. Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research) ; Lian, Xu (Peking University. College of Urban and Environmental Sciences) ; Burkhart, John F. (University of Oslo. Department of Geosciences) ; Ciais, Philippe (Laboratoire des Sciences du Climat et de l'Environnement) ; Huang, Mengtian (Peking University. College of Urban and Environmental Sciences) ; Janssens, Ivan (University of Antwerp. Department of Biology) ; Li, Yue (Peking University. College of Urban and Environmental Sciences) ; Liu, Yongwen (Peking University. College of Urban and Environmental Sciences) ; Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals) ; Peng, Shushi (Peking University. College of Urban and Environmental Sciences) ; Yang, Hui (Peking University. College of Urban and Environmental Sciences) ; Yao, Yitong (Peking University. College of Urban and Environmental Sciences) ; Yin, Yi (Laboratoire des Sciences du Climat et de l'Environnement) ; Zhao, Yutong (Chinese Academy of Sciences. Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research)