Who cuts emissions fastest, and who supports others do so, are central questions in global climate action. New IIASA-led research shows that building fairness into climate models from the start can in...

As climate impacts such as heatwaves, floods, and fires are intensifying worldwide, there is an urgent demand for information on how to respond. IIASA researchers and partners have developed a new too...

Rare heat summers today (with ≈ 100-year return period) show a different evolution of sub-seasonal temperatures than similarly rare summers in pre-industrial climate. Faster drying of soils in cu...

Unintentional unfairness when applying new greenhouse gas emissions metrics at country level, Rogelj, Joeri, Schleussner, Carl-Friedrich

A new IIASA-led study finds that expanding street green space can reduce urban heat stress in cities worldwide, but even ambitious greening efforts are unlikely to offset a significant share of the additional heat expected under climate change. Instead, the research shows that street greenery should be part of a broader portfolio of urban adaptation measures.

Abstract. Scenarios serve as a critical tool in climate change analysis, enabling the exploration of future evolution of the climate system, climate impacts, and the human system (including mitigation...

Extreme global climate outcomes may occur even under moderate 2 °C warming and may turn out to be more extreme than model-averaged projections at 3 °C or 4 °C warming.

As global temperatures move beyond 1.5 °C, overshoot now defines the landscape ahead, sharpening legal claims, exposing economic risks and revealing how far politics still trail the pace of change.

A new IIASA-led study examines growing critiques of how global climate mitigation scenarios address equity and justice and identifies key conditions for fair, feasible, and politically credible climat...

The Shared Socioeconomic Pathways (SSPs) are a set of scenarios that describe potential future developments in society, economics, and demographics until the end of the 21st century. This Explorer pre...

She made key contributions to US cold-war science despite facing huge barriers as a Black woman.

A scientific foundation is required to establish nations’ responsibilities in a hotter ‘overshoot’ world.

Climate change made 213 historical heatwaves reported over 2000–2023 more likely and more intense, to which each of the 180 carbon majors (fossil fuel and cement producers) substantially contributed.

European countries now reliant on US liquified natural gas shipments, creating risk of higher bills amid recent tensions

Abstract. Conventional climate scenarios omit fast-timescale human-system dynamics like policy rollback or economic shocks. The climate system's slow response to GHG emissions allows these `fast' ter...

Abschluss der 30. Weltklimakonferenz: Expert:innen zu drängenden Fragen rund um das Klima