Geoecological Assessment of the Dynamics of Methane Concentration in the Atmosphere over the Territory of Northeastern Vietnam

Abstract

The purpose of the research is to analyze the spatio-temporal dynamics of methane (CH4 ) concentration in the atmosphere over the territory of northeastern Vietnam based on satellite observations, to identify the causes of observed changes. Materials and Methods. The research is based on data from the Sentinel-5P satellite's TROPOMI sensor, obtained through Google Earth Engine, to analyze the spatio-temporal dynamics of CH4 concentration in six provinces of northeastern Vietnam from 2019 to 2024. The series of maps for visualization and analysis is created in the QGIS programme. Results and discussion. The analysis revealed a steady increase in CH4 concentration across the study area, particularly in the coastal area since 2023. The inland lowland area also showed a signifi cant increase in CH4 detection starting in 2021. The main reasons are the growth of coal production, the increase in the volume of unprocessed waste, the development of aquaculture and livestock farming. Sentinel-5P's technical limitations and climatic factors can also aff ect data accuracy. Conclusions. Changes in CH4 concentration in northeastern Vietnam are associated with anthropogenic activities, climatic infl uences, and technical limitations of Sentinel-5P, highlighting the need for further research to ensure its eff ective environmental monitoring.