IPCC AR5 Scenario Database

The Transitions to New Technologies (TNT) Program, in collaboration with the Energy (ENE) Program, developed a database containing the largest-ever ensemble (1,200) of greenhouse gas (GHG) emissions scenarios to support the writing teams of the Fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change (IPCC). The hosting of the databases was entrusted to IIASA.

© Hannu Viitanen | Dreamstime

© Hannu Viitanen | Dreamstime

Extensive statistical analyses of scenario panel data were performed in AR5 to assess the uncertainties of future GHG emissions in terms of drivers (population and economic growth), technology (availability of mitigation options), and climate policy (targets, participation in international mitigation regimes).

The resulting database (DB) serves as both a data archive, documenting underlying analyses of the IPCC AR5, and a research tool. It is expected to be valuable to the wider scientific community for many years to come. The demand for and the value derived from this as well as other community service scientific data portals developed by TNT together with the Energy Program is increasing, reaching some 200,000 page accesses per months (Figure 1).

Figure 1. Monthly access statistics for Web-based science tools for the global scientific community developed by TNT and ENE (click on image to enlarge).

The AR5 DB has also been expanded by a historical dataset on drivers and sources of GHG emissions that was used extensively within AR5. The database synthesizes the work of a range of different agencies and research groups, and remains proprietary. No public access version can thus be provided, except to researchers resident at IIASA or visiting.

Print this page

Last edited: 28 April 2015


Volker Krey

Deputy Program Director


T +43(0) 2236 807 415

IPCC Fifth Assessment Report

IPCC AR5 Scenario Data Base (only accessible within IIASA)

International Institute for Applied Systems Analysis (IIASA)
Schlossplatz 1, A-2361 Laxenburg, Austria
Phone: (+43 2236) 807 0 Fax:(+43 2236) 71 313