Feng Zhou¹, Qihui Wang¹, Ziyin Shang¹, Philippe Ciais², Wilfried Winiwarter³, Robert B Jackson⁴, Francesco Tubiello⁵, Greet Georgette Alice Janssens-Maenhout⁶, Hanqin Tian⁷, Xiaoqing CUI⁸ and Josep Gili Canadell⁹, (1)Peking University, Beijing, China, (2)LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette, France, (3)IIASA, Laxenburg, Austria, (4)Stanford University, Stanford, CA, United States, (5)Food and Agriculture Organization of the United Nations, Rome, Italy, (6)Joint Research Center Ispra, Ispra, Italy, (7)Auburn University, International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn, AL, United States, (8)PEKING UNIVERSITY, Beijing, China, (9)CSIRO Marine & Atmospheric Res, Canberra, Australia