Abstract for: Towards an Internally Consistent Representation of All Planetary Boundaries - Using the World-Earth Model FRIDA

The planetary boundaries (PBs) framework is a way to quantify the status of key Earth system processes which are strongly influenced by collective human activity. Transgression of their precautionary boundaries (i.e. limits to human interference) may undermine the stability of the Earth system and thus of human societies. Although the PBs are environmental in nature, many of their drivers are social and economic. This project aims to represent all nine PBs in the PBs module of FRIDA, which could build an intuition for the more complex dynamics of the actual Earth system. The PBs module will be expanded to represent the four PBs currently missing therein: ocean acidification, atmospheric aerosol loading, stratospheric ozone depletion and novel entities. We have demonstrated the representation of five out of nine PBs in FRIDA v2.0. Johansson (2024) represented all nine PBs using control variables and other proxies in a since abandoned version of FRIDA, and given this precedent, we suggest that it should be possible to represent all nine PBs in FRIDA v2.0 and later versions. The use of the societal representation within FRIDA may contribute with a foundation for an internally consistent quantification of how respective drivers and interactions of all nine PBs influence their respective statuses. In addition, this use of FRIDA might be policy relevant, e.g. by building an intuition for how different policies might impact different aspects of the environment, as represented by the PBs framework.