We acknowledge the World Climate Research Programme's Working Group on Coupled Modelling, which is responsible for CMIP and we thank the climate modeling groups (listed in Table 1 of this paper) for producing and making available their model output. For CMIP, the U.S. Department of Energy's Program for Climate Model Diagnosis and Intercomparison provides coordinating support and led development of software infrastructure in partnership with the Global Organization for Earth System Science Portals.
We also thank G. Maze for providing blended monthly time series of ocean NPP (http://data.guillaumemaze.org/ocean_productivity), and the three anonymous reviewers and Dr. Anand Gnanadesikan for their helpful comments. A special thanks to Tomohiro Hajima, Dr. Hideki Okajima, and Spencer Liddicoat for providing additional datasets not available on PCMDI server, to Philippe Peylin for sharing TransCom 3 inversion results, and Markus Reichstein for the several clarifications. This work was supported by the European Commission's 7th Framework Programme under Grant Agreements 238366 (GREENCYCLESII) and 282672 (EMBRACE), while Dr. Jones was supported by the Joint DECC/Defra Met Office Hadley Centre Climate Program (GA01101).