Welcome address

• Henry LEFEBVRE DE PLINVAL SALGUES (ISAE-SUPAERO)

Room: Thesis Room (Room 44)

Introduction

• Laurent JOLY (Institute for Sustainable Aviation)

Room: Thesis Room (Room 44)

Presentation of the week's programme

• Laurence CALMELS-LAVERGNE (Institute for Sustainable Aviation)

Room: Thesis Room (Room 44)

Systemic approach to the transition of air travel

• Laurent JOLY (Institute for Sustainable Aviation)

Room: Thesis Room (Room 44)

Air transport and societies

• Isabelle LAPLACE (ENAC)

Room: Thesis Room (Room 44) Most stakeholders agree that air transport must respond to the growing challenge of climate change. The real question is not whether change is needed, but how it should happen and what kind of air transport we want for the future. These debates highlight the complex and sometimes contradictory role of air transport in our societies. In this presentation, we will explore how air transport both influences and is influenced by society, across social, cultural, territorial, economic, political, and geopolitical dimensions.

Aviation environmental impacts and mitigation / adaptation levers

• Thomas PLANES

Room: Thesis Room (Room 44) Aviation contributes to climate change through its CO2 emissions and other effects known as non-CO2 effects. This course will quickly describe these effects, as well as other environmental impacts such as land use or energy resources consumptions. A classification of mitigation levers to reduce these impacts will then be proposed. Finally, the concepts of physical and transition risks will be introduced to discuss adaptation levers.

Workshop - Modelling aviation transition scenarios

• Thomas PLANES and Scott DELBECQ (ISAE-SUPAERO)

Room: Room 61.001 J2 info - 30 & 61.002 Modelling transition scenarios is a major challenge in evaluating decarbonisation strategies and proposing sectoral roadmaps. The aim of this workshop will be to use the AeroMAPS framework, a dedicated open-source research code, to simulate and evaluate illustrative scenarios. General results will be obtained concerning the most effective mitigation strategies, achievable environmental objectives or the effect of policies on demand.

A scenario framework to assess the aviation transition toward climate neutrality

• Rafael BALDERAS (Bauhaus-Luftfahrt)

Room: Thesis Room (Room 44) This talk presents a modular scenario framework to assess aviation’s transition to climate neutrality, capturing interactions between demand, aircraft technologies, energy supply, fleet dynamics, and climate impacts. Three pathways—SAF-led, hydrogen-led, and efficiency-driven—are compared, highlighting substantial investment needs, cost trade-offs, and the role of more efficient aircraft in mitigating operating costs. Environmental impacts are evaluated using social cost metrics, enabling comparison between transition investments and avoided damages.

Projects: introduction to projects Room: Thesis Room (Room 44) The group projects are conceived as focused interdisciplinary explorations of aviation sustainability challenges. Given the limited time frame, each group will address one specific nexus of the systemic map, building on preparatory material synthesizing relevant state-of-the-art research. Participants will engage in cross-disciplinary dialogue, including preliminary runs of disciplinary or coupled models, to uncover both the challenges and potential of interdisciplinary research. The outcome will be concise systemic insights, formalized in a two-pager and a targeted contribution to the collective gigamap.

Plenary Session - LCA and its application to aviation

• Joana ALBANO and Daniel KAN (NLR - DLR)

Room: Room 61.101 J2 SPA 24 and 61.102 J1 SPA 24 Life Cycle Assessment (LCA) is a scientific method to evaluate the total environmental impact of a product, process, or service. The approach includes resource use and emissions from raw material extraction, through manufacturing, use, and final disposal/recycling. It is an essential methodology to assess the full environmental impact of current and future technologies in aviation. This session provides an introduction to LCA, fundamentals of the theory and approaches behind it, and its relationship with other life cycle engineering methodologies. Then, applications of LCA to aviation use-cases are detailed. Last, an overview of challenges and opportunities for LCA in aviation are presented.

Plenary Session - Modelling airline behaviour

• Lynnette DRAY (University College London)

Room: Room 61.101 J2 SPA 24 et 61.102 J1 SPA 24 Competition between airlines affects their choices of networks and fleet, the itineraries and prices they offer, and how these respond to policy. Consequently, modelling airline behaviour can give insights into the effectiveness of different policy options and the potential markets for new aircraft technologies. This talk discusses factors that affect airline competition and how they can be simulated, using UCL’s Airline Behaviour Model as an example, before giving recent examples of how such modelling can be used to assess policy outcomes.

Plenary Session - Why do we travel - and do we travel too much?

• Stefan GOSSLING (Linnaeus University)

Room: Thesis Room (Room 44) The presentation covers why humans travel, and which implications in particular social media and travel influencers have for transport demand. Turning to a global climate justice perspective, the lecture then discusses distributions of global air travel, before turning to the question as to whether air transport demand is genuine or induced, and whether there are options to reduce emissions through behavioural change.