First real-time lidar capture of space debris pollution from a rocket re-entry
Scientists used a ground-based LiDAR to observe in near real time the air-pollution plume produced when SpaceX Falcon 9 debris burned up on re‑entry. The lithium signal peaked at about 60 miles altitude, and the plume moved across Western Europe (Ireland to Germany) over roughly a day, while the debris crossed from Ireland to Poland in about 2.5 minutes. Lithium is a rare tracer in the atmosphere; the team estimates about 80 grams of lithium enter Earth's atmosphere daily globally, with a Falcon 9 contributing roughly 30 kilograms of aluminum‑lithium hull and batteries per vehicle. Aluminum oxide formation could affect ozone and climate, and researchers plan to measure additional metals in future campaigns; the study was published February 19, 2026 in Communications Earth & Environment.
