The political consensus that once brought the world's space agencies together at international climate conferences has frayed, according to Simonetta Cheli, the European Space Agency's director of Earth observation. Cheli said agencies that previously coordinated their presence at climate summits are no longer attending as a unified group, a shift that carries direct consequences for how governments use satellite data to track environmental change.
Cheli's remarks point to a broader realignment in the politics of Earth observation, the field in which satellites monitor greenhouse gas emissions, deforestation, sea ice, ocean temperatures and extreme weather. For years, space agencies treated those measurements as a shared public good and used climate conferences as a venue to demonstrate collective commitment. That coordination, she suggests, has become harder to sustain as the political landscape around climate policy changes.
The change matters because Earth observation data underpins much of the evidence base for climate policy. Satellites operated by ESA, NASA and other agencies provide the long-term records that scientists use to verify emissions inventories, assess the health of ecosystems and track the pace of warming. When agencies stop appearing together at climate negotiations, the signal to policymakers and the public can shift, even if the underlying measurements continue.
Cheli, who leads ESA's Earth observation programs, has overseen a period in which the agency has expanded its fleet of environmental monitoring satellites and pushed to make their data more openly available. ESA's Copernicus program, developed with the European Union, has become one of the world's largest sources of free environmental data, used by researchers, governments and companies for everything from disaster response to agricultural planning.
The fragmentation Cheli describes does not mean the data has stopped flowing. Rather, it reflects a divergence in political priorities among the nations that fund and operate Earth observation missions. Climate conferences have long served as a stage for announcing new monitoring initiatives and for pressing governments to act on the evidence satellites produce. A reduced collective presence by space agencies could weaken that pressure at a time when the need for reliable environmental data is growing.
For the scientific community, the concern is less about any single mission than about the durability of the international partnerships that make global monitoring possible. Earth observation depends on continuity: instruments calibrated against one another, data archives maintained across decades, and agreements that allow satellites to cross national borders and share frequencies. Political shifts can threaten each of those elements.
Cheli's comments also come as Earth observation increasingly intersects with security and economic policy. Satellite data supports fisheries enforcement, border monitoring, disaster relief and commodity trading, giving governments new reasons to guard their capabilities rather than share them. That trend can complicate the open-data model that has defined much of the field.
What remains clear is that the physical processes satellites observe have not paused for politics. Emissions continue to accumulate, ice sheets continue to lose mass and extreme weather continues to test vulnerable communities. The question Cheli raises is whether the institutions that measure those changes can maintain the cooperation that made their data credible in the first place.