DOI: 10.5061/dryad.k0p2ngfk4
title: Variations in ecosystem-scale methane fluxes across a boreal mire complex assessed by a network of flux towers

description: 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)
description: # Variations in ecosystem-scale methane fluxes across a boreal mire
 complex assessed by a network of flux towers ## 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