This thesis develops a CO₂ sensor based on TDLAS-WMS. The precision of first-to-third harmonics detection is 0.02 ppm for CO₂ with 10min averaged. The observation of CO₂ was carried out in Munich from Feb. 2018 to Jan. 2019. It shows distinct monthly, weekly and diurnal CO₂ variations. CO₂ concentrations are affected by VPR and PBL. The air mass backward trajectories are computed using HySPLIT. The analyses of winter CO₂ indicate that local emissions have great impacts on urban CO₂. An HLC method is used to determine VPR and PBL and to analyze anthropogenic activities in urban areas.     «

This thesis develops a CO₂ sensor based on TDLAS-WMS. The precision of first-to-third harmonics detection is 0.02 ppm for CO₂ with 10min averaged. The observation of CO₂ was carried out in Munich from Feb. 2018 to Jan. 2019. It shows distinct monthly, weekly and diurnal CO₂ variations. CO₂ concentrations are affected by VPR and PBL. The air mass backward trajectories are computed using HySPLIT. The analyses of winter CO₂ indicate that local emissions have great impacts on urban CO₂. An HLC metho...     »