2025 UKSA Atmospheric Ablation Workshop Report
In October 2025, Secure World Foundation and the UK Space Agency, adjacent to the 7th Summit for Space Sustainability, held a closed, expert-level workshop to examine the potential atmospheric impacts of satellite re-entry, known as atmospheric ablation. This event, which included subject matter experts from industry, government, and academia, focused on the presentation of key outcomes of atmospheric ablation studies recently funded by the UK Space Agency and then featured roundtable discussions to identify opportunities or challenges and consensus on further action. Drawing from recent UKSA-funded research, including studies by Durham University, University of Leeds, University of Southampton, and Belstead Limited, participants discussed both the science and policy challenges related to this underexplored environmental issue.
As satellite re-entries increase, so does concern about the release of alumina, silica, and metal oxides into the upper atmosphere. These materials may contribute to ozone loss and broader atmospheric effects, but key uncertainties remain—especially around particle behavior, material compositions, and long-term impacts. The workshop featured a presentation from Dr. Minkwan Kim (University of Southampton) and roundtable discussions focused on identifying knowledge gaps, data-sharing needs, and paths forward.
Highlights include:
- Summary of recent UK ablation studies and key findings.
- Thematic discussions on knowledge gaps, proprietary data concerns, and international coordination.
- Recommendations for building a stronger evidence base to inform future policy.
The report stresses the need for improved observation, international collaboration, and early-stage, non-binding coordination mechanisms. It also cautions against premature regulation without sufficient data, while recognizing the urgency to act before environmental impacts escalate.
