Variations of the CO₂ mixing ratio in the atmosphere near the surface result from several processes, including photosynthesis and respiration of the underlying ecosystems, vertical mixing near the surface and in the planetary boundary layer (PBL), and entrainment of air above the PBL. We developed a novel approach for isolating ecosystem metabolism signals at the landscape scale (10²-10⁴ km²) in an hourly CO₂ record using a vertical diffusion scheme coupled with an ecosystem model.

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