The global methane budget 2000-2012. What's next?

Marielle Saunois1, Philippe Bousquet1, Ben Poulter2, Philippe Ciais3, Josep Gili Canadell4, Edward J Dlugokencky5, Anna Peregon1 and GCP-CH4 group, (1)LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette Cedex, France, (2)University of Montana, Missoula, MT, United States, (3)CNRS, Paris Cedex 16, France, (4)CSIRO Ocean and Atmosphere, Canberra, ACT, Australia, (5)NOAA Boulder, Global Monitoring Laboratory, Boulder, United States