The dominant role of semi-arid ecosystems in the trend and variability of the land CO2 sink
Anders Ahlström,
Michael R. Raupach,
Guy Schurgers,
Benjamin Smith,
Almut Arneth,
Martin Jung,
Markus Reichstein,
Josep G. Canadell,
Pierre Friedlingstein,
Atul K. Jain,
Etsushi Kato,
Benjamin Poulter,
Stephen Sitch,
Benjamin D. Stocker,
Nicolas Viovy,
Ying Ping Wang,
Andy Wiltshire,
Sönke Zaehle,
Ning Zeng
January 2015