Advanced AI-driven methane emission detection, quantification, and localization in Canada: A hybrid multi-source...

Methane (CH₄) is a significant short-term climate change contributor, but scientists face technical difficulties in accurately detecting and measuring methane and determining its precise locations. Traditional monitoring systems that utilize in-situ sensors and single-source satellite data experience multiple issues, including limited geographic coverage and difficulties with data retrieval accuracy and source identification. The paper introduces a new hybrid multi-source fusion framework that combines Sentinel-5P satellite data with ERA5 climate reanalysis data and geospatial intelligence from OpenStreetMap (OSM) and Google Earth Engine (GEE). The framework utilizes three data fusion levels - feature-level, spatial-temporal, and hybrid modeling - to enhance heterogeneous datasets for precise AI-powered monitoring of methane emissions in Canada by integrating atmospheric, meteorological, and industrial features. The system uses deep learning architectures alongside ensemble-based regressors such as CNN-GRU, LSTM-CNN, and LSTM+XGBoost to identify complex spatial and temporal dependencies. Hybrid models demonstrate superior performance over single-method approaches in anomaly detection and quantification tasks by achieving more than 92% classification accuracy and reducing prediction errors significantly. The CNN-GRU architecture showed superior performance by delivering the lowest RMSE values, together with the highest R² scores in methane concentration prediction tasks. The combination of geostatistical techniques, Kriging, and IDW with wind-aware KDTree analysis produced reliable source discovery. The scalable interpretation solution showcases improved spatial resolution along with better anomaly classification and emission attribution. This system combines satellite observations with industrial and environmental datasets to give policymakers and environmental agencies a powerful method to monitor and control methane emissions. The new methodology combines remote sensing technologies with ground-based measurement systems to enable near-real-time anomaly identification and emission hotspot detection based on remote sensing updates. The integrated methodology leads to the development of stronger regulatory structures and effective climate mitigation initiatives.