Research on Satellite Greenhouse Gas Remote Sensing Retrieval Methods Based on Machine Learning
SHENG Shu-li1, ZOU Ming-min1, 2*, LIU Tian-qi1, CHENG Yong-ping1, CHEN Zi-zheng1, WANG Xu-wen1
1. Institute of Material Science and Information Technology, Anhui University, Hefei 230601, China
2. Anhui Provincial Laboratory of Information Materials and Intelligent Perception, Anhui University, Hefei 230601, China
Abstract:Greenhouse-gas satellite remote sensing provides vital data support for climate-change research. Accurately obtaining the spatiotemporal distribution of greenhouse gas concentrations is key for effective carbon emission accounting. This study aims to develop a satellite-based greenhouse-gas retrieval model using machine-learning methods, enabling rapid and high-precision inversion of column-averaged dry-air mixing ratios (XCO2 and XCH4). First, a training dataset was constructed using an atmospheric radiative-transfer model combined with measurements from the Total Carbon Column Observing Network (TCCON). Next, a one-dimensional convolutional neural network (1D CNN) was employed as the machine-learning method. The model leveraged Adaptive Moment Estimation (Adam) and Bayesian Optimization (BO) during training. Its performance was compared to that of Random Forest (RF) and Backpropagation Neural Network (BPNN) models. Results showed that the 1D-CNN model achieved correlation coefficients of 0.953 1 for XCO2 and 0.957 3 for XCH4 on the test dataset, outperforming both RF and BPNN. Finally, high-spectral-resolution observations from the Chinese GF-5B satellite's Greenhouse gases Monitoring Instrument (GMI/GF-5B) were used to retrieve global XCO2 and XCH4 for 2022—2024. Comparisons with data from nine TCCON stations demonstrated strong agreement: the correlation coefficients exceeded 0.938 5 for XCO2 and 0.959 8 for XCH4. Overall retrieval errors were within 2 ppm for XCO2 (with 99.15% of validation samples showing errors below 1.5 ppm) and within 10 ppb for XCH4.
盛书丽,邹铭敏,刘天奇,程泳萍,陈子郑,王旭文. 基于机器学习的卫星温室气体遥感反演方法研究[J]. 光谱学与光谱分析, 2025, 45(10): 2983-2991.
SHENG Shu-li, ZOU Ming-min, LIU Tian-qi, CHENG Yong-ping, CHEN Zi-zheng, WANG Xu-wen. Research on Satellite Greenhouse Gas Remote Sensing Retrieval Methods Based on Machine Learning. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2025, 45(10): 2983-2991.
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