Jentzsch Katharina katharina.jentzsch@agro.au.dk 0000-0003-3163-4172 Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam AWI Potsdam http://www.awi.de/en/institute/sites/potsdam/ https://ror.org/032e6b942 Aarhus University AU http://www.au.dk/en/ https://ror.org/01aj84f44 van Delden Lona lona.van.delden@awi.de Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam AWI Potsdam http://www.awi.de/en/institute/sites/potsdam/ https://ror.org/032e6b942 Höse Anna anna.hoese@awi.de Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam AWI Potsdam http://www.awi.de/en/institute/sites/potsdam/ https://ror.org/032e6b942 Treat Claire C claire.treat@agro.au.dk 0000-0002-1225-8178 Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam AWI Potsdam http://www.awi.de/en/institute/sites/potsdam/ https://ror.org/032e6b942 Aarhus University AU http://www.au.dk/en/ https://ror.org/01aj84f44 2026 One year of automated chamber CO2, CH4, and N2O fluxes and ancillary environmental data along a soil moisture gradient at Siikaneva Bog, Finland, 2022 dataset bundled publication https://doi.pangaea.de/10.1594/PANGAEA.993356 2026-07-06T07:56:08 This dataset contains year-round measurements of CO2, CH4, and N2O fluxes collected in 2022 using automated chambers along a moisture gradient at Siikaneva bog in southern Finland. Measurements were conducted at three ecosystem types representing different positions along the gradient from upland to wetland: a well-drained upland boreal forest, an intermediate site, and an open bog hollow. Each site was equipped with four automated chambers to provide spatial replication, including three transparent chambers and one opaque chamber. Chamber measurements alternated throughout the day, resulting in three flux measurements per chamber per day. The dataset was collected to improve understanding of greenhouse gas fluxes across boreal landscapes, with a particular focus on non-growing season dynamics and the processes controlling CH4 and N2O emissions. Year-round measurements of these gases, especially during the non-growing season and in upland environments, remain scarce. By sampling along a moisture gradient, the study design minimizes climatic variability while allowing investigation of how soil moisture and temperature influence greenhouse gas fluxes across contrasting ecosystem types. Flux measurements are complemented by continuous environmental observations at each chamber, including soil temperature, soil moisture, photosynthetically active radiation (PAR), and water table depth at the bog site. Additional meteorological and soil variables from a weather station at the upland forest site, pro-vide further environmental context for interpreting flux variability. 24.196699999999996 24.196699999999996 61.83720000000001 61.83720000000001 24.196699999999996 61.83720000000001 2022-01-01T00:00:00 2022-12-31T23:30:00 FluxWIN The role of non-growing season processes in the methane and nitrous oxide budgets in pristine northern ecosystems https://www.awi.de/en/science/junior-groups/fluxwin.html Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven AWI https://www.awi.de/ https://ror.org/032e6b942 European Research Council ERC https://doi.org/10.13039/501100000781 851181 The role of non-growing season processes in the methane and nitrous oxide budgets in pristine northern ecosystems https://doi.org/10.3030/851181 2 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ SiiForest_PAR_A: Photosynthetically Active Radiation; Forest site | Radiation, photosynthetically active | PAR | PAR quantum sensors, Kipp & Zonen, PQS1 | SiiForest_ChT_A1: Air temperature in the chamber; Forest site, Chamber 1 (transparent) | Temperature, technical | T tech | Pt100 temperature sensor, Nokeval, IKES-50-6.0-5M | SiiForest_ST_2_A1: Soil temperature at 2 cm depth; Forest site, Chamber 1 (transparent) | Temperature, soil | T soil | SiiForest_ST_10_A1: Soil temperature at 10 cm depth; Forest site, Chamber 1 (transparent) | SiiForest_ChT_A2: Air temperature in the chamber; Forest site, Chamber 2 (transparent) | SiiForest_ST_2_A2: Soil temperature at 2 cm depth; Forest site, Chamber 2 (transparent) | SiiForest_ST_10_A2: Soil temperature at 10 cm depth; Forest site, Chamber 2 (transparent) | SiiForest_ChT_A3: Air temperature in the chamber; Forest site, Chamber 3 (transparent) | SiiForest_ST_2_A3: Soil temperature at 2 cm depth; Forest site, Chamber 3 (transparent) | SiiForest_ST_10_A3: Soil temperature at 10 cm depth; Forest site, Chamber 3 (transparent) | SiiForest_ChT_A4_d: Air temperature in the chamber; Forest site, Chamber 4 (opaque) | SiiForest_ST_2_A4_d: Soil temperature at 2 cm depth; Forest site, Chamber 4 (opaque) | SiiForest_ST_10_A4_d: Soil temperature at 10 cm depth; Forest site, Chamber 4 (opaque) | SiiForest_VWC_A: Soil Volumetric Water Content; Forest site | Water content, volumetric | VWC | Soil moisture sensors, Delta-T Devices, ML3 ThetaProbe | SiiInterm_PAR_B: Photosynthetically Active Radiation; Intermediate site | SiiInterm_ChT_B1: Air temperature in the chamber; Intermediate site, Chamber 1 (transparent) | SiiInterm_ST_2_B1: Soil temperature at 2 cm depth; Intermediate site, Chamber 1 (transparent) | SiiInterm_ST_10_B1: Soil temperature at 10 cm depth; Intermediate site, Chamber 1 (transparent) | SiiInterm_ChT_B2: Air temperature in the chamber; Intermediate site, Chamber 2 (transparent) | SiiInterm_ST_2_B2: Soil temperature at 2 cm depth; Intermediate site, Chamber 2 (transparent) | SiiInterm_ST_10_B2: Soil temperature at 10 cm depth; Intermediate site, Chamber 2 (transparent) | SiiInterm_ChT_B3: Air temperature in the chamber; Intermediate site, Chamber 3 (transparent) | SiiInterm_ST_2_B3: Soil temperature at 2 cm depth; Intermediate site, Chamber 3 (transparent) | SiiInterm_ST_10_B3: Soil temperature at 10 cm depth; Intermediate site, Chamber 3 (transparent) | SiiInterm_ChT_B4_d: Air temperature in the chamber; Intermediate site, Chamber 4 (opaque) | SiiInterm_ST_2_B4_d: Soil temperature at 2 cm depth; Intermediate site, Chamber 4 (opaque) | SiiInterm_ST_10_B4_d: Soil temperature at 10 cm depth; Intermediate site, Chamber 4 (opaque) | SiiInterm_VWC_B: Soil Volumetric Water Content; Intermediate site | SiiBog_PAR_C: Photosynthetically Active Radiation; Bog site | SiiBog_ChT_C1: Air temperature in the chamber; Bog site, Chamber 1 (transparent) | SiiBog_ST_2_C1: Soil temperature at 2 cm depth; Bog site, Chamber 1 (transparent) | SiiBog_ST_10_C1: Soil temperature at 10 cm depth; Bog site, Chamber 1 (transparent) | SiiBog_ChT_C2: Air temperature in the chamber; Bog site, Chamber 2 (transparent) | SiiBog_ST_2_C2: Soil temperature at 2 cm depth; Bog site, Chamber 2 (transparent) | SiiBog_ST_10_C2: Soil temperature at 10 cm depth; Bog site, Chamber 2 (transparent) | SiiBog_ChT_C3: Air temperature in the chamber; Bog site, Chamber 3 (transparent) | SiiBog_ST_2_C3: Soil temperature at 2 cm depth; Bog site, Chamber 3 (transparent) | SiiBog_ST_10_C3: Soil temperature at 10 cm depth; Bog site, Chamber 3 (transparent) | SiiBog_ChT_C4_d: Air temperature in the chamber; Bog site, Chamber 4 (opaque) | SiiBog_ST_2_C4_d: Soil temperature at 2 cm depth; Bog site, Chamber 4 (opaque) | SiiBog_ST_10_C4_d: Soil temperature at 10 cm depth; Bog site, Chamber 4 (opaque) | SiiBog_VWC_C: Soil Volumetric Water Content; Bog site | SiiBog_T_moss: Soil temperature within the living moss layer; Bog site | SiiBog_ST_10: Soil temperature at 10 cm depth; Bog site | SiiBog_ST_25: Soil temperature at 25 cm depth; Bog site | SiiBog_ST_45: Soil temperature at 45 cm depth; Bog site | SiiBog_ST_95: Soil temperature at 95 cm depth; Bog site | SiiBog_WTD: Water table depth; indicates water column height above sensor | Water table depth | WTD | Description of Chamber site: Site along moisture gradient: A (upland forest), B (intermediate), C (bog); chamber (spatial replicate) within site: 1-3: transparent chambers, 4: opaque chamber | Site | Gas analyzer, Picarro, G2508 | CO2_st_conc_umol: Initial CO2 concentration in chamber | Carbon dioxide | CO2 | CO2_ug_m2_h: CO2 flux rate | Carbon dioxide, flux | CO2 flux | CO2_rsquared: R-squared value for CO2 regression | Coefficient of determination | R**2 | CO2_rmse: R-squared value for CO2 regression [µg/m²/h] | Root mean square error | RMSE | CO2_num_of_data: Number of data points used in CO2 regression | Data points | CO2_amb_avg_umol_m2: Ambient average CO2 concentration | Carbon dioxide, ambient, average | CO2 amb avg | CO2_amb_SD: Standard deviation of ambient CO2 concentration | Carbon dioxide, ambient, standard deviation | CO2 std dev | CO2_zeroflux_ug_m2_h: CO2 flux calculated at zero flux condition | Carbon dioxide, flux, at zero flux condition | CO2 zero flux | CH4_st_conc_umol: Initial CH4 concentration in chamber | Methane | CH4 | CH4_ug_m2_h: CH4 flux rate | Methane, flux | CH4 flux | CH4_rsquared: R-squared value for CH4 regression | CH4_rmse: Root Mean Square Error for CH4 concentration fit [µg/m²/h] | CH4_num_of_data: Number of data points used in CH4 regression | CH4_amb_avg_umol_m2: Ambient average CH4 concentration | Methane, ambient, average | CH4 amb avg | CH4_amb_SD: Standard deviation of ambient CH4 concentration | Methane, ambient, standard deviation | CH4 std dev | CH4_zeroflux_ug_m2_h: CH4 flux calculated at zero flux condition | Methane, flux, at zero flux condition | CH4 zero flux | N2O_st_conc_umol: Initial N2O concentration in chamber | Nitrous oxide | N2O | N2O_ug_m2_h: N2O flux rate | Nitrous oxide, flux | N2O flux | N2O_rsquared: R-squared value for N2O regression | N2O_rmse: Root Mean Square Error for N2O concentration fit [µg/m²/h] | N2O_num_of_data: Number of data points used in N2O regression | N2O_amb_avg_umol_m2: Ambient average N2O concentration | Nitrous oxide, ambient, average | N2O amb avg | N2O_amb_SD: Standard deviation of ambient N2O concentration | Nitrous oxide, ambient, standard deviation | N2O std dev | N2O_zeroflux_ug_m2_h: N2O flux calculated at zero flux condition | Nitrous oxide, flux, at zero flux condition | N2O zero flux | Alarm code indicating various warnings, concatenated based on specific conditions | Code automated chambers bog Boreal CH4 fluxes CO2 fluxes Finland Forest greenhouse gas fluxes moisture gradient N2O fluxes Peatland upland wetland method12165 method17815 method19288 method19289 param116256 param117536 param181493 param181497 param20721 param48491 param4875 param50007 param507141 param520582 param563675 param565287 param565288 param565289 param565290 param565291 param565292 param565293 param565294 param565295 param565296 param565297 param565298 param91183 param94636 pi91849 author116504 author57937 author78906 author91849 award382 funder20666 geocode1599 geocode1600 geocode1601 inst20913 inst21044 inst32 license21 project4516 term2687750 term396 term47665 term47974 term53928 term54473 term625 term71867 term74681 term77366 term77367 term77368 term77369