Mer et changements climatiques | Décarbonation du transport maritime mondial [...] Thomas LECLERC

Mer et changements climatiques | Décarbonation du transport maritime mondial [...] Thomas LECLERC

by Thomas LECLERC

Humanities, Social Sciences & Thought Engineering & Technology TQEnvironmental science, engineering and technologyTQPGreenhouse gas emissions technologies
🎙 Thomas LECLERC 👥 13K 📅 November 27, 2025 ⏱ 25 min 👁 32 📄 expert opinion 🧭 2026-08-15
Available in: English (current) Français

Keywords

décarbonationtransport maritimeaviationCORSIAOMIOACIdroit internationalchangements climatiques

Summary

This presentation by Thomas Leclerc, a legal scholar, compares the decarbonization efforts of the International Maritime Organization (IMO) and the International Civil Aviation Organization (ICAO). He begins by noting that both sectors contribute 2-4% of global greenhouse gas emissions and are excluded from the Kyoto Protocol’s binding targets, leading to a ‘sectoral exceptionalism’. He then details ICAO’s approach, which evolved from preventive measures (technical and operational) to include a market-based measure, CORSIA (Carbon Offsetting and Reduction Scheme for International Aviation). CORSIA requires airlines to offset emissions above a baseline by purchasing carbon credits. He explains that ICAO chose CORSIA over taxes due to the fuel tax exemption in the Chicago Convention. He also discusses the institutional conflicts, such as the EU’s attempt to include aviation in its emissions trading scheme, which pressured ICAO to act. Finally, he draws lessons for IMO, noting that while IMO has been slower to adopt economic measures, its legal framework (MARPOL) is more robust than ICAO’s. He concludes that both organizations have competence but not exclusive, and that unilateral actions or a future desectoralization are possible if they fail.

184 words

Critical Evaluation

Value of the Information & Strength of the Argument

The presentation provides valuable comparative legal analysis, highlighting the different regulatory paths taken by ICAO and IMO. The argumentation is solid, based on specific legal instruments and historical developments. The speaker effectively explains the rationale behind CORSIA’s design, considering legal constraints and political pressures. The comparison with IMO is insightful, noting both progress and shortcomings. The discussion of potential conflicts of norms and institutional dynamics adds depth. However, the presentation is largely descriptive and could benefit from more critical evaluation of the effectiveness of these measures in actually reducing emissions.

Scientific Rigor, Source Quality, Title Accuracy

The speaker demonstrates scientific rigor by referencing specific legal texts (Chicago Convention, Kyoto Protocol, CORSIA) and recent events (2025 ICAO Assembly). The sources are not explicitly cited in the video, but the speaker’s expertise and the institutional context lend credibility. The title accurately reflects the content, focusing on lessons from ICAO for maritime decarbonization. The presentation is well-structured and coherent, with clear arguments. No comments were provided, so no analysis of public reception is possible.

180 words

Title / Content Match

The title accurately reflects the content: a comparison of maritime and aviation decarbonization, focusing on lessons from ICAO for IMO.

Quality & Reliability

8/10

The speaker is a legal scholar (Maître de conférences in public law) presenting a comparative analysis based on his doctoral research. The content is well-structured, references specific legal instruments (Chicago Convention, Kyoto Protocol, CORSIA) and recent developments (2025 ICAO Assembly). No obvious errors or unsupported claims detected.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

  • Convention on International Civil Aviation (Chicago Convention) — Founding treaty of ICAO, referenced for its provisions on fuel tax exemption and SARPs.
  • Kyoto Protocol — Article 2(2) excludes aviation and maritime emissions from binding targets, directing them to ICAO and IMO.
  • CORSIA (Carbon Offsetting and Reduction Scheme for International Aviation) — Market-based measure adopted by ICAO to offset emissions from international aviation.
  • Annex 16 to the Chicago Convention — Contains environmental standards, including Volume IV for CORSIA.
  • MARPOL Convention — IMO's main treaty addressing marine pollution, referenced as a robust legal framework.

Concurring Sources

  • CORSIA — Official information on CORSIA, confirming its design and phases.
  • IMO Initial GHG Strategy — Confirms IMO's targets and timeline for reducing emissions.

Contribution & Novelties

This presentation offers a comparative legal analysis of decarbonization efforts in aviation and maritime sectors, highlighting the different regulatory paths and the rationale behind CORSIA. It provides insights into the legal constraints and institutional dynamics that shape international climate action in these sectors.

Pour aller plus loin :

  • CORSIA — Official ICAO page on CORSIA, detailing its mechanism and implementation.
  • IMO’s Initial GHG Strategy — Overview of IMO’s strategy to reduce greenhouse gas emissions from ships.
  • EU ETS and aviation — EU’s approach to including aviation in its emissions trading system, which influenced ICAO’s actions.

95 words

Radar Profile

The radar profile shows high scores in information quantity, quality, and reliability, with a slightly lower technical level, reflecting the legal and policy focus of the presentation. The overall balance indicates a well-researched and credible analysis.

Reliability 8/10