Shahan_chamber_data.xlsx

Daytime soil CO₂ and CH₄ chamber flux data collected from June 2020 to June 2021 in a restored tidal saltmarsh at the Eden Landing Ecological Reserve. The soil surface within a given collar was 79 cm² and the average volume was 1,860 cm³. The collars were inserted 19 cm into the soil with 0.5 cm holes drilled to allow for water flow. The chamber top was opaque to simulate dark conditions, equipped with a fan to promote mixing, and connected via tubing to a CO₂ and CH₄ gas analyzer (LI‑7810, LI-COR, Lincoln, NE, USA). CO₂ and CH₄ concentrations were measured and recorded with 1 Hz frequency, allowing soil chamber closure time to be short around 3 min. Therefore, all collar locations were measured within a 2 hr window, minimizing the difference in ambient conditions between collar measurements. The trace gas analyzer was calibrated every three to six months in the laboratory.