| Description |
MAX-DOAS (Multi-axis Differential Optical Absorption Spectroscopy) measures tropospheric NO2 (Nitrogen Dioxide) columns by analyzing scattered sunlight at different angles, providing vertical profiles and spatial distribution of this key pollutant from ground-based stations, crucial for validating satellites (like TROPOMI), evaluating air quality models, and understanding emission impacts from traffic and industry, revealing diurnal/seasonal patterns linked to combustion and atmospheric chemistry. |