Greenhouse gas fluxes at a agricultural peatland in Southern Finland

Greenhouse gas fluxes were measured during summer and fall of 2024 in an extensively managed agricultural peatland in Holonsuo, Lahti, Finland (61.0025 °N, 25.8214 °E). Greenhouse gas fluxes on four measurement plots were monitored along with soil temperature and water table level.  

The study site is a peatland drained for agricultural purposes (peat field). Total of four measurement plots were founded at the site. The plots were located diagonally between two ditches. Measurements were carried out approximately every 3-4 weeks from June to September 2024 (Fig1). During the measurement period the field was not used for cultivation. Portable LI-COR Trace Gas Analyzers were the used measurement devices; TG10 for CO2 and CH4 and TG20 for N2O. Greenhouse gas fluxes were measured using a dark chamber. Volume of the used chamber was 24,16 dm3 and the chamber was equipped with a fan. Before setting the chamber on the measurement plot the vegetation was cut short each time (approx. 5 cm height). Soil temperature at 5 and 30 cm depth as well as water table level were also measured simultaneously with greenhouse gas measurements.

The data set ("Holonsuo_ghg_data.csv") contains the measurement date, water table level (cm below ground), soil temperature at 5 and 30 cm (°C) and greenhouse gas fluxes g m-2 h-1. In Fig1 fluxes are presented as averages of each measurement date (unit mg m-2 h-1).