Guoyi Zhou¹, *Shan Xu², Ciais Philippe ³, Manzoni Stefano ^4,5 (1.Institute of Ecology, Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China, 2.Guangdong Institute of Eco-environmental and Soil Sciences, 3.Institut Pierre Simon Laplace, Laboratoire des Sciences du Climat et de l’Environnement, CEA CNRS UVSQ UPSaclay, 91191 Gif sur Yvette, France, 4.Department of Physical Geography, Stockholm University, Stockholm SE-10691, Sweden, 5.Bolin Centre for Climate Research, Stockholm SE-10691, Sweden)