Modelling and data: Final reports on the fourth emissions budget and 2050 target review (including whether emissions from international shipping and aviation should be included)
About this page
Published 11 December 2024
This page provides information about the models and data that informed our analysis in two related reports:
- Advice on the fourth emissions budget
- Review of the 2050 target including whether emissions from international shipping and aviation should be included
This supporting material should be read alongside our technical annex for these reports:
Download: Technical Annex [PDF – 1.14 MB]
What's on this page
We used five models to inform our analysis – ENZ, C-PLAN, DETA, EnergyLink and FaIR. This page sets out information about these models and how to access them, the assumptions we put into the models, and the results we obtained.
We have released three of these models: ENZ, C-PLAN and DETA. We will continue to improve our models over time and will update the public versions as appropriate.
The fourth model we used in our analysis is a proprietary model owned by Energy Link. The fifth model is the FaIR model, developed by a team of UK researchers. They have released it for public use.
Use the tabs in the left hand menu to read more and download related files for each piece of supporting material.
Related modelling and data
We consulted the public on this work in April–May 2024. Modelling and data that supported our draft advice and discussion documents is available here: Modelling and data: Consultation on emissions reduction target and emissions budgets
We first provided advice on emissions budgets in 2021. Modelling and data that supported that advice is available here: Modelling and data in Ināia tonu nei.