Massive, short-lived methane leaks can now be detected automatically, from space, anywhere in the world—a first step toward plugging them and slowing ClimateChange.
Methane is a stealthy greenhouse gas, erupting unpredictably from sources such as pipelines and gas fields. Scientists have wanted to catch these emitters in the act. In the past, watchdogs had to monitor likely sites from the ground or by airplane. Now, massive, short-lived leaks can be detected automatically, from space, anywhere in the world—a first step toward plugging them and slowing climate change.
. Last month alone, they detected 192 methane plumes—some persistent, some intermittent—with an emissions rate greater than 10 tons per hour, concentrated in Asia but popping up on every continent except Antarctica. SRON’s automatic methane spotter relies on the Tropospheric Monitoring Instrument aboard the Sentinel-5 Precursor satellite, launched in 2017 as part of Europe’s Copernicus program of Earth observation. Designed to monitor atmospheric pollution, TROPOMI’s spectrometer has also proved capable of detecting the infrared glow of methane. Investigators began to use the spectrometer to monitor regions already known to be large methane sources.
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