Achieving net-zero by the second half of the century is considered vital if global temperatures are to remain well below the two degrees rise as set out by the Paris Agreement for climate. From their vantage point in space, satellites provide a unique means of tracking progress towards achieving this balance between greenhouse gas emissions from sources and removal by sinks.

How space-based approaches can support the UN Global stocktake, starting in 2023, are the focus of technical discussions at the 2022 United Nations Climate Change Conference (COP27) currently taking place in Sharm El-Sheikh, and feature results from ESA’s trailblazing REgional Carbon