The unambiguous framing of what is being attributed to what is a crucial first step for an assessment , followed by the identification of the possible and plausible drivers of change and the development of a hypothesis or theory for the linkage . The next step is to clearly define the indicators of the observed change or event and note the quality of the observations. There has been significant progress in the compilation of fragmented and distributed observational data, broadening and deepening the data basis for attribution research . The quality of the observational record of drivers should also be considered . Impacted systems also change in the absence of climate change. This baseline and its associated modifiers such as agricultural developments or population growth need to be considered, alongside the exposure and vulnerability of people depending on these systems.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report