Hanqin Tian¹, Rona Thompson², Rongting Xu¹, Josep Gili Canadell³, Eric A Davidson⁴, Philippe Ciais⁵, Robert B Jackson⁶, Wilfried Winiwarter⁷, Parvadha Suntharalingam⁸, Pierre A. G. Regnier⁹, Feng Zhou¹⁰, Greet Georgette Alice Janssens-Maenhout¹¹, Almut Arneth¹², Wei Li⁵, Naiqing Pan¹³, Shufen Pan¹⁴, Michael J Prather¹⁵, Peter A Raymond¹⁶, Hao Shi¹ and GCP/INI Synthesis Team, (1)Auburn University, International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn, AL, United States, (2)NILU, Oslo, Norway, (3)CSIRO Marine & Atmospheric Res, Canberra, Australia, (4)University of Maryland, Center for Environmental Science, Frostburg, MD, United States, (5)LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette Cedex, France, (6)Stanford University, Stanford, CA, United States, (7)IIASA, Laxenburg, Austria, (8)Organization Not Listed, University of East Anglia, Washington, DC, United States, (9)Université Libre de Bruxelles, Department of Earth and Environmental Sciences, Brussels, Belgium, (10)Peking University, China, Beijing, China, (11)Joint Research Center Ispra, Ispra, Italy, (12)Karlsruhe Institute of Technology, Atmospheric Environmental Research, Karlsruhe, Germany, (13)Auburn University, International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn, United States, (14)Auburn University at Montgomery, Auburn, AL, United States, (15)Univ California Irvine, Irvine, CA, United States, (16)Yale University, New Haven, CT, United States