Variations in ecosystem-scale methane fluxes across a boreal mire complex assessed by a network of flux towers
Data files
May 01, 2025 version files 8.34 MB
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Archive_KRI_CH4_dynamics.zip
8.34 MB
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README.md
4 KB
Abstract
This dataset presents high-resolution measurements of methane (CH4) fluxes and associated environmental variables from a boreal mire complex in Northern Sweden. The dataset encompasses three years of continuous monitoring (2020-2022) using a network of four eddy-covariance flux towers, providing comprehensive spatial and temporal data on ecosystem-scale methane dynamics.
Dataset Contents
- Half-hourly eddy covariance measurements of methane fluxes (2020-2022)
- Environmental drivers (2020-2022) including:
- Gross primary production
- Soil temperature
- Water table depth
- Peat pore methane concentration measurements (2022)
- Sentinel 2 Satellite-derived Normalized Difference Vegetation Index (NDVI) (2020-2022)
Overview
This dataset presents high-resolution measurements of carbon and methane fluxes from four boreal mire sites in Sweden, collected between 2020 and 2022. The data encompass ecosystem-scale measurements of net ecosystem exchange, methane fluxes, and supporting environmental variables.
Data Structure
Folder 1: Halfhourly Fluxes and Biomet Data
Four CSV files with identical structure, named according to the pattern: [Site Code]_2020-2022.csv
File Structure
First row of each file represent column headers, Second row represents a description, and Third row contains units
| Column | Description | Unit | Example Format |
|---|---|---|---|
| datetime | Timestamp | YYYY-MM-DD HH:MM | 2020-01-01 00:30 |
| nee | Net Ecosystem Exchange | g C m-2 (30min)-1 | Numeric |
| gpp | Gross Primary Production | g C m-2 (30min)-1 | Numeric |
| reco | Ecosystem Respiration | g C m-2 (30min)-1 | Numeric |
| quality_nee | Data Quality for NEE | -- | Original/Gapfilled |
| ch4_flux | Methane Fluxes | g C m-2 (30min)-1 | Numeric |
| quality_ch4 | Data Quality for CH4 | -- | Original/Gapfilled |
| tair | Air Temperature (2m height) | °C | Numeric |
| tsoil_10cm | Soil Temperature (10cm depth) | °C | Numeric |
| WTD | Water Table Depth | cm | Negative values below surface |
| PARin | Incoming Photosynthetically Active Radiation | μmol m-2 s-1 | Numeric |
Included Sites
- SE-Deg: Degerö Mire
- SE-HfM: Hälsingfors Mire
- SE-Hmr: Hålmyran
- SE-Srj: Stortjärn
Folder 2: NDVI and Peat Pore CH4 Concentration
NDVI Data: NDVI_Sentinel2_2020-2022.csv
| Column | Description | Unit | Example Format |
|---|---|---|---|
| date | Observation Date | YYYY-MM-DD | 2020-01-01 |
| Site | Site Code | -- | SE-Deg |
| NDVI | Normalized Difference Vegetation Index | -- | Numeric |
Peat Pore Methane Concentrations: Peat_pore_methane_concentrations_2022.csv
| Column | Description | Unit | Example Format |
|---|---|---|---|
| Site | Site Code | -- | SE-Deg |
| Microform | Vegetation Microform | -- | Hummock/Lawn |
| Month | Data Collection Month | -- | May-September |
| Depth | Sampling Depth | cm | Numeric |
| CH4_concentration | Methane Concentration | ppm | Numeric |
Data Collection Methods
- Half-hourly measurements of carbon and methane fluxes based on eddy covariance flux measurements using four tower sites
- Sentinel-2 satellite-derived NDVI (using google earth engine)
- Peat pore methane concentration sampling from May to September 2022
Data Quality
- Missing data is represented by nothing between commas and automatically recognized as missing data (NA) when uploaded in R for instance
- Gapfilled data clearly marked in quality columns
- Measurements follow standardized ecological monitoring protocols