The IACC Group leads the development of tools for a new generation of “coupled” global transformation pathways that are able to represent bottom-up local constraints and opportunities at the national and sub-national scale, which is a major focus of the ECE Program.

IACC’s central goal is the development of response strategies and alternative pathways towards a low-carbon economy, taking into account the many linkages to all aspects of society and the environment. For this purpose, the IACC group develops and maintains methods, including the MESSAGEix model which is at the heart of IIASA's Integrated Assessment Modeling framework.

First, the integration of climate change impacts into the IAM framework to account for the main benefits of mitigation, that is, avoided climate change impacts which, in turn, has implications for a wide set of sustainable development objectives. Better understanding how climate impacts will affect different parts of the population, taking into account the aspects of vulnerability and equity and the degree to which affected population segments are able to adapt, will therefore be a key research focus leading to a quantification of the benefits of mitigation beyond simple economic considerations based on monetized impacts.

Second, material cycles are integrated into the IAM framework to broaden the strategy space beyond classic energy- and land-based climate mitigation strategies by including important elements of circular economy approaches. Initially, the focus is on bulk materials such as steel, cement, non-ferrous metals, or plastics, with the aim to also include important critical materials for key low-carbon technologies, such as batteries and fuel cells.

Third, with decision-making support requiring input at different levels - global, regional, national, and subnational - the integration of analysis across different spatial scales is a research focus relevant to all the previously listed topics of the IACC group, requiring further methodological and tool development. Key aspects of this challenge will be, on the one hand, increasing the spatial and temporal granularity of relevant parts of the IAM framework, and on the other, explicitly representing a wider set of policy options, for example, to develop climate action plans at the national or subnational scale.  

Finally, IIASA operates a community data hub for global climate change mitigation and transformation pathways, for example, by hosting multiple key datasets for the Intergovernmental Panel on Climate Change (IPCC) and the Integrated Assessment Modeling Consortium (IAMC). These globally-focused efforts are complemented by activities that support the development of national mitigation strategies as well as sector-specific activities such as supporting the finance community in using mitigation scenarios to assess the transition and physical climate change risks of, for instance, investment portfolios.

Models, tools, datasets

gas pipeline

Model for Energy Supply Strategy Alternatives and their General Environmental Impact (MESSAGEix)

India Forest

The NExus Solutions Tool (NEST)

Photo 134399877 © Designer491 | Dreamstime.com

ENGAGE Scenario Explorer

IPCC

AR6 Scenario Explorer and Database

Projects

RESCUE

Response of the Earth System to overshoot, Climate neUtrality and negative Emissions (RESCUE)

Beige and colored pawns grouped together

Exploring National and Global Actions to reduce Greenhouse gas Emissions (ENGAGE)

From linear economy to a circular economy

Developing circular pathways for a EU low-carbon transition (CircEUlar)

Photo 260785013 © Mirko Kuzmanovic | Dreamstime.com

Development of a global integrated assessment modeling system for climate-air pollutants management focused on Northeast Asia (GUIDE)

Staff

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Mia Werning

Researcher (IACC)

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Simon De Stercke

Guest Research Scholar (IACC)

Deepak Shah profile picture

Deepak Shah

Research Software Developer (ECE, IACC)

Marianne Kraschitzer-Grant profile picture

Marianne Kraschitzer-Grant

Project Officer (IACC)

News

Windmill Africa Dreamstime

12 December 2023

Giacomo Falchetta receives the IAMC Best Online Poster Award

IIASA Energy, Climate, and Environment researcher, Giacomo Falchetta, received the Best Online Poster Award at the Integrated Assessment Modeling Consortium (IAMC)’s recent Sixteenth Annual Meeting in Venice, Italy, for his project focusing on integrated modeling of renewable energy-centered sustainable development futures in rural Africa.
AI generated ecology concept with green planet earth, green technologies and a thriving city

06 December 2023

Pivotal moment for humanity as tipping point threats and opportunities accelerate

The world has reached a pivotal moment as threats from Earth system tipping points – and progress towards positive tipping points – accelerate. The just released Global Tipping Points Report – the most comprehensive assessment of tipping points ever conducted – highlights that humanity is currently on a disastrous trajectory.
Reduce CO2 emission concept with green background and icons depicting ways to help reduce carbon dioxide in the air.

22 November 2023

New research exemplifies collaboration between IIASA and EAP

IIASA and the University of Wisconsin Madison's Energy, Analysis, and Policy (EAP) Program have a history of collaborating on impactful research and formalized their partnership in 2022 thanks in part to a generous donation from Wes and Ankie Foell. Wes Foell, EAP co-founder, completed modeling work for IIASA in the 1970’s, and hopes to see the collaboration continue to grow.

Events

Focus

11 November 2023

Empowerment through science

Options Magazine, Winter 2023: IIASA Transformative Institutional and Social Solutions Research Group Leader, Shonali Pachauri, explores policy pathways for achieving universal access to basic services and technologies. She was a lead author of the Working Group III contribution to the Intergovernmental Panel on Climate Change (IPCC)’s Sixth Assessment Report (AR6), and a member of the Extended Writing Team for the Synthesis Report.
Options 2023

04 October 2023

ENGAGE Summary for Policymakers

As the world faces the risks of dangerous climate change, policymakers, industry and civil society leaders are counting on Integrated Assessment Models (IAMs) to inform and guide strategies to deliver on the objectives of the Paris Agreement (PA) and subsequent agreements.
ENGAGE Summary for Policymakers

Publications