Satellites accurately detect methane emissions in largest controlled test yet - Phys.org

Tracking invisible climate-warming gas from space used to be a long shot. That was until a team of scientists proved that orbit-based monitoring could work. In a study published on October 14 in Nature, researchers from the Stanford Doerr School of Sustainability conducted the largest controlled test of space-based methane monitoring ever. They timed 481 controlled methane releases in Casa Grande, Arizona, matching them with overpasses from 11 different satellites.

image: ProNet integrates AI directly into traditional atmospheric equations. This hybrid approach accurately predicts air pollution and corrects multi-day errors without violating the laws of physics, minimizing the unfeasible guesses often made by pure AI systems. Every day, millions of people rely on air quality forecasts to protect their health, while cities depend on them to trigger emergency pollution responses and emission controls. Yet delivering forecasts that are both pinpoint-accurate and scientifically explainable has long posed a daunting dilemma. Traditional chemical transport models simulate atmospheric physics and chemistry by calculating governing equations but are severely constrained by unpredictable human emissions. Meanwhile, purely data-driven artificial intelligence (AI) has advanced rapidly, but pure AI models lack physical common sense: they frequently produce erratic, physically unfeasible concentration swings, fail during unprecedented weather extremes, and operate as opaque black boxes that cannot diagnose why errors occur.

We’re sharing this article early to provide faster access to peer-reviewed, accepted research. It is citable and carries a permanent DOI. This version is subject to further edits and will be replaced automatically by the final Version of Record. All legal disclaimers apply. AbstractWe demonstrate a mechanism for the deterministic nucleation of magnetic hopfions in cylindrical nanopillars via transient magnetic field pulses. By exploiting a chiral magnetic cylinder with engineered surface uniaxial anisotropy, we show that field pulses trigger a non-equilibrium magnetization dynamics. Depending on the pulse amplitude, the system relaxes into distinct topologically protected energy minima, stabilizing either isolated hopfions or coexisting states with other three-dimensional solitons. This approach offers a framework for manipulating 3D topological textures without requiring localized spin-polarized currents, broadening the understanding of three-dimensional nanomagnetism.

A creator with experience tracking methane at landfills is drawing attention to a less flashy climate measure: fixing leaks from oil, coal, and gas infrastructure. In a TikTok video, Alaina Wood (@thegarbagequeen) presented methane leak repairs at fossil fuel sites as a fast way to cut emissions.

Data availabilityGround-metered flow rate files, meteorology data files and cloud cover imagery from the cooperative phase 0 and all blind experimental phases are provided at https://doi.org/10.25740/QH001QT3946 (ref. 51). Spectral imagery from participating satellites was not collected by the experiment team and will not be made available directly through this study. However, these data can be acquired through public platforms or purchased from commercial platforms for many of the tested satellites, as described in Supplementary Information section 2.1. Source data are provided with this paper. Code availability The code to reproduce the figures in this paper is available at https://doi.org/10.25740/QH001QT3946 (ref. 51).