Jentzsch, Katharina; Männistö, Elisa; Marushchak, Maija E; Korrensalo, Aino; van Delden, Lona; Tuittila, Eeva-Stiina; Treat, Claire C: Seasonal chamber measurements of CH4 fluxes and their isotopic composition along with environmental conditions at vegetation removal experiments in hollows at Siikaneva bog, Finland, in 2021 and 2022 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.965402 (dataset in review)
Abstract:
The data set contains measurements of methane (CH4) emissions and their δ13C values at vegetation removal experiments consisting of three vegetation treatments (intact vegetation, vascular plants removed, all vegetation removed). We took pore water samples for DOC, concentrations and δ13C values of CH4 dissolved in the pore water and measured the peat temperature, each at 7, 20 and 50 cm depth in the peat profile outside of as well as within each vegetation removal area. Additionally, we determined the leaf area index of each vascular plant species present at our sampling sites and measured the water table depth. One complete set of measurements consisted of manual chamber CH4 flux measurements at five spatial replicates of the plot cluster consisting of the three vegetation treatments. Each chamber measurement was performed once under light and once under dark conditions. In summer 2021 each measurement was additionally performed under single and double shading of the measurement plot. Pore water sampling and peat temperature measurements were performed once in an area of intact vegetation and once within the area where vascular plants had previously been removed at each of the five spatial replicates. Water table depth was measured once per spatial replicate. Such measurement sets were collected at the hollow microtopography type of Siikaneva bog in South-Western Finland, in July, August and October 2021 as well as in May, July, September and October 2022. Data on CH4 dissolved in the pore water is available only from the 2022 campaigns. We combined CH4 flux measurements on vegetation removal experiments with pore water concentrations and isotopic data to identify the seasonal change in the components of CH4 fluxes (production, oxidation, transport pathways) as well as in their environmental and ecological controls.
Keyword(s):
Funding:
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. FN-2023-FluxWIN: FluxWIN
Coverage:
Latitude: 61.824900 * Longitude: 24.139000
Date/Time Start: 2021-07-14T00:00:00 * Date/Time End: 2022-10-04T00:00:00
Minimum DEPTH, soil: 0.00 m * Maximum DEPTH, soil: 0.50 m
Event(s):
FN-Land_2021_SiikanevaPeatland_Bog_210714 * Latitude: 61.824900 * Longitude: 24.139000 * Date/Time: 2021-07-14T00:00:00 * Elevation: 160.0 m * Campaign: FN-Land_2021_SiikanevaPeatland * Basis: AWI Arctic Land Expedition * Method/Device: Multiple investigations (MULT) * Comment: Siikaneva bog
FN-Land_2021_SiikanevaPeatland_Bog_210715 * Latitude: 61.824900 * Longitude: 24.139000 * Date/Time: 2021-07-15T00:00:00 * Elevation: 160.0 m * Campaign: FN-Land_2021_SiikanevaPeatland * Basis: AWI Arctic Land Expedition * Method/Device: Multiple investigations (MULT) * Comment: Siikaneva bog
FN-Land_2021_SiikanevaPeatland_Bog_210719 * Latitude: 61.824900 * Longitude: 24.139000 * Date/Time: 2021-07-19T00:00:00 * Elevation: 160.0 m * Campaign: FN-Land_2021_SiikanevaPeatland * Basis: AWI Arctic Land Expedition * Method/Device: Multiple investigations (MULT) * Comment: Siikaneva bog
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | Event label | Event | ||||
2 | Date/Time of event | Date/Time | ||||
3 | Latitude of event | Latitude | ||||
4 | Longitude of event | Longitude | ||||
5 | Elevation of event | Elevation | m | |||
6 | Campaign of event | Campaign | ||||
7 | Country | Country | Jentzsch, Katharina | |||
8 | Site | Site | Jentzsch, Katharina | |||
9 | Campaign | Campaign | Jentzsch, Katharina | field work | ||
10 | Season | Season | Jentzsch, Katharina | |||
11 | Replicate | Repl | Jentzsch, Katharina | |||
12 | Treatment: vegetation | T:vegetation | Jentzsch, Katharina | PSV: intact vegetation; PS: vasular plants removed - Sphagnum moss layer remaining; P: all vegetation removed - only bare peat remaining | ||
13 | Treatment: light condition | T:light | Jentzsch, Katharina | L: light; 1: single shading; 2: double shading; D: dark | ||
14 | DEPTH, soil | Depth soil | m | Jentzsch, Katharina | Geocode – depth of 0 indicates measurements at the surface (CH4 fluxes, ?13C CH4 of emitted CH4, LAI) | |
15 | Date/time start, experiment | Date/time start exp | Jentzsch, Katharina | |||
16 | Date/time end, experiment | Date/time end exp | Jentzsch, Katharina | |||
17 | Method comment | Method comm | Jentzsch, Katharina | Gas analyzer model: LI-COR CH4, CO2, H2O Trace Gas Analyzer (LI7180); LGR Microportable Greenhouse Gas Analyzer (MGGA) | ||
18 | Methane, flux | CH4 flux | mg/m2/day | Jentzsch, Katharina | Flux chamber | Manual flux chamber with inline greenhouse gas analyzer indicated in column "Method comment" |
19 | Leaf area index | LAI | Jentzsch, Katharina | Reconstructed | LAItot (LAI of all vascular plants), reconstructed for each growing season day based on number of leaves * average leaf area (LI-3000 Portable Area Meter) counted/measured 3 times in 2021 and 5 times in 2022, respectively | |
20 | Leaf area index | LAI | Jentzsch, Katharina | Reconstructed | LAIaer (LAI of all aerenchyatmous plants), reconstructed for each growing season day based on number of leaves * average leaf area (LI-3000 Portable Area Meter) of aerenchymatous plants counted/measured 3 times in 2021 and 5 times in 2022, respectively | |
21 | Leaf area index | LAI | Jentzsch, Katharina | Reconstructed | LAISchPal (LAI of Scheuchzeria Palustris), reconstructed for each growing season day based on number of leaves * average leaf area (LI-3000 Portable Area Meter) of Scheuchzeria Palustris counted/measured 3 times in 2021 and 5 times in 2022, respectively | |
22 | Temperature, peat | T peat | °C | Jentzsch, Katharina | Thermometer probe (THERMO) | |
23 | Water table depth | WTD | m | Jentzsch, Katharina | Cavity ringdown spectroscopy (G2201-i Isotopic Analyzer, Picarro, Santa Clara, USA) | measured manually in perforated tube, negative values indicate water table levels above the soil surface |
24 | Methane, porewater | CH4 pw | µmol/l | Jentzsch, Katharina | Cavity ringdown spectroscopy (G2201-i Isotopic Analyzer, Picarro, Santa Clara, USA) | pore water samples equilibrated with N2 and analyzed on Picarro G2201-I Isotopic Analyzer + autosampler SAM |
25 | δ13C, methane, atmospheric | δ13C CH4 | ‰ PDB | Jentzsch, Katharina | Cavity ringdown spectroscopy (G2201-i Isotopic Analyzer, Picarro, Santa Clara, USA) | gas samples taken from chamber headspace and analyzed on Picarro G2201-I Isotopic Analyzer + autosampler SAM |
26 | Carbon, organic, dissolved | DOC | mg/l | Jentzsch, Katharina | Shimadzu TOC-L total organic carbon analyzer | pore water samples acidified with HCl and analyzed on Shimadzu TOC-L analyzer |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
6107 data points
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