Abstract
Historical and anticipated future total CO2 emissions to 2050 show more agreement with Representative Concentration Pathway 8.5 (RCP8.5) than other Coupled Model Intercomparison Project 5 (CMIP5)-era RCPs (1). Hausfather and Peters (2) attempt to argue against this by emphasizing 1) RCP4.5 or RCP6.0 better match fossil fuel emissions (FF) relative to International Energy Agency scenarios; and 2) our future emissions from land-use change (ELUC) diverge from RCPs and the new Shared Socioeconomic Pathways (SSPs). What matters for the purpose of providing input to climate models, however, is total atmospheric CO2 content, not how much of that CO2 came from FF vs. ELUC. Assumed errors … [↵][1]1To whom correspondence may be addressed. Email: cschwalm{at}whrc.org. [1]: #xref-corresp-1-1
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