Open-path Dual-Comb Spectroscopy Observations of Greenhouse Gas Spatial and Temporal Variability over Km-scale Paths

Key Points

• The research aims to measure and analyze the spatial and temporal variability of greenhouse gas emissions using advanced dual-comb spectroscopy.
• Utilized a dual-comb spectrometer for continuous measurements.
• Conducted open-path measurements of CO2 and CH4 at building-top heights.
• Operated the system over multiple months in varying seasonal conditions.
• Found significant spatial and temporal variability in CO2 and CH4 emissions.
• Measurements were taken over kilometer-scale paths in an urban setting.
• Data collected for over 3 months in summer 2023 and more than 1 month in winter 2024.