What term has the IPCC used to describe different greenhouse gas scenarios?

The term used by the IPCC to describe different greenhouse gas scenarios is "Representative Concentration Pathways." These pathways provide a framework for projecting how varying levels of greenhouse gas emissions can affect global warming over the 21st century. Each pathway corresponds to a specific trajectory of emissions and is designed to help researchers understand and model the potential consequences of growing atmospheric concentrations of greenhouse gases.

The acronym RCPs indicates that these scenarios represent different radiative forcing levels, helping to capture the range of possible climate futures based on varying degrees of mitigation efforts. By defining these scenarios, the IPCC enables policymakers and scientists to assess risks and develop strategies to mitigate climate change impacts.