Scientists at JPL, which Caltech manages for NASA, are helping California create a detailed, statewide inventory of methane point sources - highly concentrated methane releases from single sources - using a specialized airborne sensor. The new data, published this week in the journal Nature, can be used to target actions to reduce emissions of this potent greenhouse gas.
Like carbon dioxide, methane traps heat in the atmosphere, but it does so more efficiently and for a shorter period of time. Scientists estimate that most methane emissions in California are driven by industrial facilities, such as oil and gas fields, large dairies and landfills. To help reduce methane's impact on climate, the state has made cutting human-caused emissions a priority. But in order to cut these hard-to-detect emissions, they have to be measured and the sources identified.
"This work shows unequivocally that methane point sources exist not only exist in the oil and gas industry but also in landfills and agriculture. Finding these large point sources is the trickiest part, mitigation can ensue quickly after that, representing a win-win for both the environment as well as industry," says Christian Frankenberg, professor of environmental science and engineering, and a coauthor of the Nature paper.
