he RCP database aims at documenting the emissions, concentrations, and land-cover change projections of the so-called "Representative Concentration Pathways" (RCPs). Information about the RCPs and the scenario development process for the IPCC AR5 can be found in the IPCC Expert Meeting Report on New Scenarios and Moss et al. (2010).
For a draft work plan summarizing the data exchange between the Integrated Assessment and Climate Modeling community see also the "Representative Concentration Pathways (RCPs) Draft Handshake". The final RCPs have been documented in a Special Issue of Climatic Change that was published in November 2011 (Climatic Change, Volume 109, Issue 1-2). The overview paper (van Vuuren et al, 2011) of the Special Issue summarizes the main achievements. Further description of the RCP can be found below.