1. IPCC, 2013: Climate Change 2013: Summary for Policymakers, The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, Ed. by T. F. Stocker, D. Qin, G.-K. Plattner, (Cambridge Univ. Press, Cambridge, 2013).
2. IPCC, 2014: Climate Change 2014: Synthesis Report, Contribution of Working Group I, II to III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, Ed. by R. K. Pachauri and L. A. Meyer (Cambridge Univ. Press, Cambridge, 2014).
3. D. Wunch, G. C. Toon, J. F. L. Blavier, et al., “The total carbon column observing network,” Philos. Trans. R. Soc., A 369, 2087–2112 (2011).
4. Satellite Missions Database. https://directory.eoportal.org/web/eoportal/satellite-missions/.
5. Network for the Detection of Atmospheric Composition Change. http://www.ndsc.ncep.noaa.gov/.