Satellites confirm reliability in measuring methane emissions

A group of researchers from Stanford University subjected twelve satellites to a direct comparison with controlled methane releases conducted in Arizona, in a study published in the journal Nature. The aim of the experiment was to verify how effectively space-based observation systems are actually able to detect real emissions of a climate-altering gas that remains difficult to measure on a large scale with other instruments.

The results indicate that sensors specifically designed to detect methane picked up between 92 and 100% of the events staged during the experiment. This is a high margin of accuracy for instruments operating hundreds of kilometres from the Earth’s surface, and it reinforces the overall reliability of satellite monitoring of emissions.

The experiment lasted one year and comprised 746 trials, with release rates ranging from 9.5 to 1,183.7 kilograms per hour. The data collected were processed by 15 analysis groups from nine different countries, an experimental design that made it possible to verify not only the satellites’ capabilities but also the consistency between the different processing methods used by the various research groups.

It should be noted that the news currently comes from a single source available in the material consulted, although it concerns the description of a study published in a peer-reviewed journal; no further independent accounts of the experiment are currently available.

The most significant finding remains the combination of the scale of the test — one year of observations, nearly 750 trials, very different release rates — and the detection rate of dedicated sensors, ranging between 92 and 100% of events: an empirical basis that strengthens the possibility of using satellite data as an independent verification tool for emissions declared by plants and infrastructure.