Fuchs, Matthias; Jones, Miriam C; Gowan, Evan J; Frolking, Steve; Walter Anthony, Katey M; Grosse, Guido; Jones, Benjamin M; O'Donnel, Jonathan; Brosius, Laura Susan; Treat, Claire C: Methane flux measurements from coastal wetlands on the Kenai Peninsula [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.960156 (dataset in review)
Abstract:
The methane (CH4) flux was measured during a field campaign in August 2021 on the Kenai Peninsula, Alaska. We chose locations in coastal wetlands along transects to cover a gradient from freshwater flooded into tidal, saltwater flooded wetlands. In total, we measured at 27 different locations including saltwater tidal regularly flooded bare grounds, temporarily irregularly flooded, as well as seasonally flooded, vegetated coastal wetlands.
Flux measurements were made with a micro-portable LosGatos greenhouse gas analyzer (LosGatos Research) and a light-weight custom-made bucket chamber consisting of non-transparent PVC (diameter = 26 cm, volume ~ 19,000 cm3). We chose this small, lightweight equipment in order to be highly mobile in muddy, shrubby terrain and measure at field sites which were not easy to access. At each site we measured three replicates for 7 to 10 minutes, described the vegetation cover (if present), and measured the chamber and air temperature. The bucket chamber was equipped with a venting tube and a small fan to have well-mixed conditions in the chamber.
The CH4 flux (in mg CH4 m-2 h-1) for each replicate measurement was calculated based on the volume and temperature of the bucket chamber, and the ideal gas law. We manually removed the first 30 sec of each measurement, because of potential disturbance while placing the bucket chamber on the site (we did not use pre-installed collars). Fluxes were calculated by applying a linear regression to the CH4 concentration and were given in mg CH4 m-2 h-1. The r squared was used to determine the quality of the linear regression. Fluxes that had a linear regression with a r squared below 0.9 were discarded. However, we did not want to exclude all the near-zero measurements as these indicate important data as well (no CH4 fluxes). Therefore, all measurements, which were below the precision of the greenhouse gas analyzer of 0.5 ppb (~0.44 mg CH4 m-2 h-1, depending on chamber volume) were included in the analysis as zero fluxes.
In a final step, we averaged all the replicates from a measurement site in order to have one CH4 flux value per measurement site and calculated the CH4 flux for the growing season of 153 days in g CH4 m-2 yr-1, which served as input data for the bootstrapping of the Beringia coastal wetland CH4 estimation.
Supplement to:
Fuchs, Matthias; et al. (in review): Methane flux from Beringian coastal wetlands for the past 20,000 years.
Project(s):
Funding:
European Research Council (ERC), grant/award no. 851181: The role of non-growing season processes in the methane and nitrous oxide budgets in pristine northern ecosystems
National Science Foundation (NSF), grant/award no. 1903623: Collaborative Research: Sea-level rise, coastal wetland expansion, and proglacial lake contributions to abrupt increases in northern atmospheric CH4 during the last deglaciation
National Science Foundation (NSF), grant/award no. 1903735: Collaborative Research: Sea-level rise, coastal wetland expansion, and proglacial lake contributions to abrupt increases in northern atmospheric CH4 during the last deglaciation
National Science Foundation (NSF), grant/award no. 1927553: Collaborative Research: AccelNet: Permafrost Coastal Systems Network (PerCS-Net) -- A Circumpolar Alliance for Arctic Coastal Community Information Exchange
Coverage:
Median Latitude: 60.537113 * Median Longitude: -151.215966 * South-bound Latitude: 60.523670 * West-bound Longitude: -151.266890 * North-bound Latitude: 60.546660 * East-bound Longitude: -151.186070
Date/Time Start: 2021-08-04T00:00:00 * Date/Time End: 2021-08-24T00:00:00
Event(s):
AK-Land_2021_SAlaska_KEN21-T1-1 (KEN21-T1-1) * Latitude: 60.523670 * Longitude: -151.191500 * Location: Kenai River, Alaska * Campaign: AK-Land_2021_SAlaska (Perma-X Land 2021) * Basis: AWI Arctic Land Expedition * Method/Device: Greenhouse Gas Analyzer, LosGatos
AK-Land_2021_SAlaska_KEN21-T1-2 (KEN21-T1-2) * Latitude: 60.525890 * Longitude: -151.190730 * Location: Kenai River, Alaska * Campaign: AK-Land_2021_SAlaska (Perma-X Land 2021) * Basis: AWI Arctic Land Expedition * Method/Device: Greenhouse Gas Analyzer, LosGatos
AK-Land_2021_SAlaska_KEN21-T1-3 (KEN21-T1-3) * Latitude: 60.528100 * Longitude: -151.189870 * Location: Kenai River, Alaska * Campaign: AK-Land_2021_SAlaska (Perma-X Land 2021) * Basis: AWI Arctic Land Expedition * Method/Device: Greenhouse Gas Analyzer, LosGatos
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Fuchs, Matthias | |||
| 2 | Area/locality | Area | Fuchs, Matthias | |||
| 3 | Location | Location | Fuchs, Matthias | |||
| 4 | Transect | Transect | Fuchs, Matthias | |||
| 5 | Site | Site | Fuchs, Matthias | |||
| 6 | Replicate | Repl | Fuchs, Matthias | |||
| 7 | DATE/TIME | Date/Time | Fuchs, Matthias | Geocode – Measurement Date | ||
| 8 | Type | Type | Fuchs, Matthias | Wetland | ||
| 9 | Class | Class | Fuchs, Matthias | Wetland Class | ||
| 10 | Analytical method | Method | Fuchs, Matthias | Measuring method | ||
| 11 | Major vegetation | Major vegetation | Fuchs, Matthias | Dominant Vegetation | ||
| 12 | Volume | Vol | cm3 | Fuchs, Matthias | Chamber Volume | |
| 13 | Area | Area | m2 | Fuchs, Matthias | Chamber Area | |
| 14 | Temperature, technical | T tech | °C | Fuchs, Matthias | Chamber temperature | |
| 15 | Methane, flux | CH4 flux | mg/m2/h | Fuchs, Matthias | Greenhouse Gas Analyzer, LosGatos | |
| 16 | Coefficient of determination | R**2 | Fuchs, Matthias | |||
| 17 | Methane, flux, limit of detection | CH4 flux LOD | mg/m2/h | Fuchs, Matthias | ||
| 18 | Comment | Comment | Fuchs, Matthias |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
2061 data points
Data
| 1 Event | 2 Area | 3 Location | 4 Transect | 5 Site | 6 Repl | 7 Date/Time | 8 Type | 9 Class | 10 Method | 11 Major vegetation | 12 Vol [cm3] | 13 Area [m2] | 14 T tech [°C] | 15 CH4 flux [mg/m2/h] | 16 R**2 | 17 CH4 flux LOD [mg/m2/h] | 18 Comment |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AK-Land_2021_SAlaska_KEN21-T1-1 | Kenai River, Alaska | KEN | T1 | 1 | A | 2021-08-04 | Tundra fen | Seasonally flooded | static chamber, portable GHG analyzer | Moss, Menyanthes trifoliata | 0.0188 | 0.0546 | 17.3 | 2.79 | 0.97 | 0.31 | |
| AK-Land_2021_SAlaska_KEN21-T1-1 | Kenai River, Alaska | KEN | T1 | 1 | B | 2021-08-04 | Tundra fen | Seasonally flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0193 | 0.0543 | 18.0 | 5.78 | 1.00 | 0.32 | |
| AK-Land_2021_SAlaska_KEN21-T1-1 | Kenai River, Alaska | KEN | T1 | 1 | C | 2021-08-04 | Tundra fen | Seasonally flooded | static chamber, portable GHG analyzer | Carex spp., Menyanthes trifoliata | 0.0183 | 0.0549 | 18.1 | 6.05 | 1.00 | 0.30 | |
| AK-Land_2021_SAlaska_KEN21-T1-1 | Kenai River, Alaska | KEN | T1 | 1 | A | 2021-08-11 | Tundra fen | Seasonally flooded | static chamber, portable GHG analyzer | Moss, Menyanthes trifoliata | 0.0370 | 0.0553 | 15.9 | 5.97 | 1.00 | 0.61 | |
| AK-Land_2021_SAlaska_KEN21-T1-1 | Kenai River, Alaska | KEN | T1 | 1 | B | 2021-08-11 | Tundra fen | Seasonally flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0193 | 0.0543 | 17.1 | 10.32 | 1.00 | 0.32 | |
| AK-Land_2021_SAlaska_KEN21-T1-1 | Kenai River, Alaska | KEN | T1 | 1 | C | 2021-08-11 | Tundra fen | Seasonally flooded | static chamber, portable GHG analyzer | Carex spp., Menyanthes trifoliata | 0.0178 | 0.0553 | 17.2 | 8.82 | 1.00 | 0.29 | |
| AK-Land_2021_SAlaska_KEN21-T1-1 | Kenai River, Alaska | KEN | T1 | 1 | D | 2021-08-11 | Tundra fen | Seasonally flooded | static chamber, portable GHG analyzer | Sphagnum fuscum | 0.0317 | 0.0586 | 17.8 | 24.39 | 1.00 | 0.49 | |
| AK-Land_2021_SAlaska_KEN21-T1-1 | Kenai River, Alaska | KEN | T1 | 1 | E | 2021-08-11 | Tundra fen | Seasonally flooded | static chamber, portable GHG analyzer | Sphagnum fuscum | 0.0240 | 0.0631 | 16.9 | 12.52 | 0.86 | 0.35 | Discarded due to low r square |
| AK-Land_2021_SAlaska_KEN21-T1-2 | Kenai River, Alaska | KEN | T1 | 2 | A | 2021-08-04 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Carex spp., Equisetum spp. | 0.0183 | 0.0549 | 19.1 | 4.00 | 1.00 | 0.30 | |
| AK-Land_2021_SAlaska_KEN21-T1-2 | Kenai River, Alaska | KEN | T1 | 2 | B | 2021-08-04 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0183 | 0.0549 | 19.1 | 6.12 | 1.00 | 0.30 | |
| AK-Land_2021_SAlaska_KEN21-T1-2 | Kenai River, Alaska | KEN | T1 | 2 | C | 2021-08-04 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0178 | 0.0553 | 18.7 | 2.67 | 1.00 | 0.29 | |
| AK-Land_2021_SAlaska_KEN21-T1-3 | Kenai River, Alaska | KEN | T1 | 3 | A | 2021-08-05 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0266 | 0.0616 | 21.6 | 6.75 | 0.97 | 0.39 | |
| AK-Land_2021_SAlaska_KEN21-T1-3 | Kenai River, Alaska | KEN | T1 | 3 | B | 2021-08-05 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Rhododendron spp., Sphagnum spp. | 0.0311 | 0.0590 | 23.5 | 2.05 | 0.95 | 0.47 | |
| AK-Land_2021_SAlaska_KEN21-T1-3 | Kenai River, Alaska | KEN | T1 | 3 | C | 2021-08-05 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Sphagnum spp. | 0.0172 | 0.0556 | 23.6 | 3.13 | 1.00 | 0.27 | |
| AK-Land_2021_SAlaska_KEN21-T1-4 | Kenai River, Alaska | KEN | T1 | 4 | B | 2021-08-06 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Carex stylosa, betula nana | 0.0317 | 0.0586 | 22.2 | 5.99 | 0.99 | 0.48 | |
| AK-Land_2021_SAlaska_KEN21-T1-4 | Kenai River, Alaska | KEN | T1 | 4 | C | 2021-08-06 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Sphagnum spp. | 0.0162 | 0.0562 | 22.7 | 1.89 | 0.98 | 0.26 | |
| AK-Land_2021_SAlaska_KEN21-T1-4 | Kenai River, Alaska | KEN | T1 | 4 | D | 2021-08-06 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0311 | 0.0590 | 19.9 | 6.42 | 1.00 | 0.47 | |
| AK-Land_2021_SAlaska_KEN21-T1-4 | Kenai River, Alaska | KEN | T1 | 4 | A | 2021-08-10 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Carex aquatilis | 0.0359 | 0.0560 | 20.5 | 3.92 | 1.00 | 0.57 | |
| AK-Land_2021_SAlaska_KEN21-T1-4 | Kenai River, Alaska | KEN | T1 | 4 | B | 2021-08-10 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Carex stylosa, betula nana | 0.0364 | 0.0556 | 21.7 | 8.68 | 1.00 | 0.58 | |
| AK-Land_2021_SAlaska_KEN21-T1-4 | Kenai River, Alaska | KEN | T1 | 4 | C | 2021-08-10 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Sphagnum spp. | 0.0353 | 0.0564 | 21.6 | 1.55 | 0.97 | 0.56 | |
| AK-Land_2021_SAlaska_KEN21-T1-4 | Kenai River, Alaska | KEN | T1 | 4 | D | 2021-08-10 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0329 | 0.0578 | 20.5 | 6.03 | 0.99 | 0.51 | |
| AK-Land_2021_SAlaska_KEN21-T1-5 | Kenai River, Alaska | KEN | T1 | 5 | A | 2021-08-05 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Betula nana | 0.0335 | 0.0575 | 19.1 | 46.63 | 0.96 | 0.52 | |
| AK-Land_2021_SAlaska_KEN21-T1-5 | Kenai River, Alaska | KEN | T1 | 5 | B | 2021-08-05 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Sphagnum spp. | 0.0140 | 0.0576 | 20.4 | 8.31 | 0.99 | 0.22 | |
| AK-Land_2021_SAlaska_KEN21-T1-5 | Kenai River, Alaska | KEN | T1 | 5 | C | 2021-08-05 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Rhododendron spp. | 0.0311 | 0.0590 | 18.9 | 1.59 | 0.98 | 0.47 | |
| AK-Land_2021_SAlaska_KEN21-T1-6 | Kenai River, Alaska | KEN | T1 | 6 | A | 2021-08-06 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Ledum groenlandicum, Betula nana, Carex spp. | 0.0311 | 0.0590 | 23.2 | 97.81 | 0.93 | 0.47 | |
| AK-Land_2021_SAlaska_KEN21-T1-6 | Kenai River, Alaska | KEN | T1 | 6 | B | 2021-08-06 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0323 | 0.0582 | 24.3 | 122.03 | 0.96 | 0.49 | |
| AK-Land_2021_SAlaska_KEN21-T1-6 | Kenai River, Alaska | KEN | T1 | 6 | C | 2021-08-06 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Sphagnum spp. | 0.0151 | 0.0569 | 23.0 | 21.90 | 0.83 | 0.24 | Discarded due to low r square |
| AK-Land_2021_SAlaska_KEN21-T1-6 | Kenai River, Alaska | KEN | T1 | 6 | A | 2021-08-10 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Ledum groenlandicum, Betula nana, Carex spp. | 0.0329 | 0.0578 | 21.1 | 6.08 | 0.90 | 0.51 | Discarded due to low r square |
| AK-Land_2021_SAlaska_KEN21-T1-6 | Kenai River, Alaska | KEN | T1 | 6 | B | 2021-08-10 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0341 | 0.0571 | 18.3 | 7.14 | 0.99 | 0.54 | |
| AK-Land_2021_SAlaska_KEN21-T1-6 | Kenai River, Alaska | KEN | T1 | 6 | C | 2021-08-10 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Sphagnum spp. | 0.0370 | 0.0553 | 20.8 | 4.81 | 1.00 | 0.60 | |
| AK-Land_2021_SAlaska_KEN21-T1-7 | Kenai River, Alaska | KEN | T1 | 7 | A | 2021-08-06 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Sphagnum spp. | 0.0156 | 0.0566 | 25.0 | 5.12 | 0.42 | 0.24 | Discarded due to low r square |
| AK-Land_2021_SAlaska_KEN21-T1-7 | Kenai River, Alaska | KEN | T1 | 7 | B | 2021-08-06 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Sphagnum spp. | 0.0156 | 0.0566 | 24.0 | 6.40 | 1.00 | 0.24 | |
| AK-Land_2021_SAlaska_KEN21-T1-7 | Kenai River, Alaska | KEN | T1 | 7 | C | 2021-08-06 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0292 | 0.0601 | 23.4 | 4.74 | 0.85 | 0.43 | Discarded due to low r square |
| AK-Land_2021_SAlaska_KEN21-T1-8A | Kenai River, Alaska | KEN | T1 | 8A | A | 2021-08-06 | Mud flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground with Algae | 0.0183 | 0.0549 | 17.9 | 0.07 | 1.00 | 0.30 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T1-8A | Kenai River, Alaska | KEN | T1 | 8A | B | 2021-08-06 | Mud flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground with Algae | 0.0183 | 0.0549 | 20.4 | 0.02 | 0.96 | 0.30 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T1-8A | Kenai River, Alaska | KEN | T1 | 8A | C | 2021-08-06 | Mud flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground with Algae | 0.0178 | 0.0553 | 21.7 | 0.02 | 0.95 | 0.29 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T1-8B | Kenai River, Alaska | KEN | T1 | 8B | A | 2021-08-06 | Mud flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0178 | 0.0553 | 20.6 | 0.32 | 0.76 | 0.29 | Discarded due to low r square |
| AK-Land_2021_SAlaska_KEN21-T1-8B | Kenai River, Alaska | KEN | T1 | 8B | B | 2021-08-06 | Mud flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0172 | 0.0556 | 20.4 | 0.65 | 0.99 | 0.28 | |
| AK-Land_2021_SAlaska_KEN21-T1-8B | Kenai River, Alaska | KEN | T1 | 8B | C | 2021-08-06 | Mud flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0178 | 0.0553 | 19.5 | 0.29 | 0.98 | 0.29 | |
| AK-Land_2021_SAlaska_KEN21-T1-8C | Kenai River, Alaska | KEN | T1 | 8C | A | 2021-08-06 | Mud flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0178 | 0.0553 | 19.5 | 2.98 | 0.97 | 0.29 | |
| AK-Land_2021_SAlaska_KEN21-T1-8C | Kenai River, Alaska | KEN | T1 | 8C | B | 2021-08-06 | Mud flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | bare ground, sweet grass | 0.0376 | 0.0549 | 22.0 | 8.88 | 1.00 | 0.61 | |
| AK-Land_2021_SAlaska_KEN21-T1-8C | Kenai River, Alaska | KEN | T1 | 8C | C | 2021-08-06 | Mud flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | bare ground, sweet grass | 0.0376 | 0.0549 | 21.7 | 12.05 | 1.00 | 0.61 | |
| AK-Land_2021_SAlaska_KEN21-T2-9 | Kenai River, Alaska | KEN | T2 | 9 | A | 2021-08-06 | Marsh | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Triglochin spp. | 0.0172 | 0.0556 | 21.1 | 4.81 | 0.98 | 0.28 | |
| AK-Land_2021_SAlaska_KEN21-T2-9 | Kenai River, Alaska | KEN | T2 | 9 | B | 2021-08-06 | Marsh | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0370 | 0.0553 | 22.5 | 0.89 | 1.00 | 0.60 | |
| AK-Land_2021_SAlaska_KEN21-T2-9 | Kenai River, Alaska | KEN | T2 | 9 | C | 2021-08-06 | Marsh | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0260 | 0.0620 | 22.1 | 0.36 | 1.00 | 0.37 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T2-10 | Kenai River, Alaska | KEN | T2 | 10 | A | 2021-08-10 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Calamagrostis spp., Grasses | 0.0370 | 0.0553 | 19.7 | 13.76 | 0.95 | 0.60 | |
| AK-Land_2021_SAlaska_KEN21-T2-10 | Kenai River, Alaska | KEN | T2 | 10 | B | 2021-08-10 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Calamagrostis spp., Grasses | 0.0323 | 0.0582 | 21.6 | 6.42 | 0.99 | 0.50 | |
| AK-Land_2021_SAlaska_KEN21-T2-10 | Kenai River, Alaska | KEN | T2 | 10 | C | 2021-08-10 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Calamagrostis spp., Grasses | 0.0370 | 0.0553 | 21.3 | -0.75 | 0.74 | 0.60 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T2-11 | Kenai River, Alaska | KEN | T2 | 11 | A | 2021-08-10 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Sphagnum spp. | 0.0311 | 0.0590 | 24.2 | 65.26 | 0.87 | 0.47 | Discarded due to low r square |
| AK-Land_2021_SAlaska_KEN21-T2-11 | Kenai River, Alaska | KEN | T2 | 11 | B | 2021-08-10 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Sphagnum spp. | 0.0347 | 0.0567 | 25.2 | 1.85 | 0.99 | 0.54 | |
| AK-Land_2021_SAlaska_KEN21-T2-11 | Kenai River, Alaska | KEN | T2 | 11 | C | 2021-08-10 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Sphagnum spp. | 0.0341 | 0.0571 | 21.8 | 3.65 | 1.00 | 0.53 | |
| AK-Land_2021_SAlaska_KEN21-T3-1 | Kenai River, Alaska | KEN | T3 | 1 | A | 2021-08-17 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Calamagrostis spp., Empetrum nigrum | 0.0364 | 0.0556 | 19.3 | 25.86 | 0.94 | 0.59 | |
| AK-Land_2021_SAlaska_KEN21-T3-1 | Kenai River, Alaska | KEN | T3 | 1 | B | 2021-08-17 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Calamagrostis spp., Empetrum nigrum | 0.0353 | 0.0564 | 19.5 | 16.32 | 0.89 | 0.56 | Discarded due to low r square |
| AK-Land_2021_SAlaska_KEN21-T3-1 | Kenai River, Alaska | KEN | T3 | 1 | C | 2021-08-17 | Tundra | Seasonally flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0364 | 0.0556 | 19.8 | 35.71 | 0.89 | 0.59 | Discarded due to low r square |
| AK-Land_2021_SAlaska_KEN21-T3-2 | Kenai River, Alaska | KEN | T3 | 2 | A | 2021-08-18 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Potentilla spp. | 0.0376 | 0.0549 | 19.7 | 0.03 | 0.82 | 0.62 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-2 | Kenai River, Alaska | KEN | T3 | 2 | B | 2021-08-18 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Potentilla spp., Carex spp. | 0.0359 | 0.0560 | 21.2 | 0.04 | 0.97 | 0.57 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-2 | Kenai River, Alaska | KEN | T3 | 2 | C | 2021-08-18 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Litter | 0.0353 | 0.0564 | 20.0 | 0.07 | 0.98 | 0.56 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-3 | Kenai River, Alaska | KEN | T3 | 3 | A | 2021-08-18 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Carex spp., moss | 0.0178 | 0.0553 | 19.0 | 0.00 | 0.01 | 0.29 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-3 | Kenai River, Alaska | KEN | T3 | 3 | B | 2021-08-18 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Triglochin spp., Carex spp. | 0.0370 | 0.0553 | 20.6 | 0.00 | 0.10 | 0.60 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-3 | Kenai River, Alaska | KEN | T3 | 3 | C | 2021-08-18 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Triglochin spp., Carex spp. | 0.0370 | 0.0553 | 21.1 | 0.00 | 0.02 | 0.60 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-4 | Kenai River, Alaska | KEN | T3 | 4 | A | 2021-08-18 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0370 | 0.0553 | 22.0 | -0.01 | 0.23 | 0.60 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-4 | Kenai River, Alaska | KEN | T3 | 4 | B | 2021-08-18 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Carex spp. | 0.0183 | 0.0549 | 22.6 | 0.00 | 0.01 | 0.30 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-4 | Kenai River, Alaska | KEN | T3 | 4 | C | 2021-08-18 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0178 | 0.0553 | 23.5 | 0.00 | 0.00 | 0.29 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-5 | Kenai River, Alaska | KEN | T3 | 5 | A | 2021-08-18 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Bare ground, Plantago maritima | 0.0370 | 0.0553 | 22.8 | 0.00 | 0.06 | 0.60 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-5 | Kenai River, Alaska | KEN | T3 | 5 | B | 2021-08-18 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Bare ground, Plantago maritima | 0.0183 | 0.0549 | 22.3 | 0.00 | 0.17 | 0.30 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-5 | Kenai River, Alaska | KEN | T3 | 5 | C | 2021-08-18 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Bare ground, Plantago maritima | 0.0370 | 0.0553 | 22.1 | 0.01 | 0.41 | 0.60 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-6 | Kenai River, Alaska | KEN | T3 | 6 | A | 2021-08-18 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Carex spp. Plantago maritima | 0.0178 | 0.0553 | 24.1 | -0.04 | 1.00 | 0.63 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-6 | Kenai River, Alaska | KEN | T3 | 6 | B | 2021-08-18 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Carex spp. Plantago maritima | 0.0353 | 0.0564 | 22.4 | 0.01 | 0.13 | 0.28 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-7 | Kenai River, Alaska | KEN | T3 | 7 | A | 2021-08-18 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, Carex spp. | 0.0353 | 0.0564 | 22.4 | 0.01 | 0.13 | 0.56 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-7 | Kenai River, Alaska | KEN | T3 | 7 | B | 2021-08-18 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0188 | 0.0546 | 24.8 | -0.01 | 0.67 | 0.30 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T3-7 | Kenai River, Alaska | KEN | T3 | 7 | C | 2021-08-18 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0188 | 0.0546 | 21.9 | 0.00 | 0.21 | 0.31 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-1 | Kenai River, Alaska | KEN | T4 | 1 | A | 2021-08-17 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, sweet grass | 0.0183 | 0.0549 | 19.2 | 0.00 | 0.07 | 0.30 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-1 | Kenai River, Alaska | KEN | T4 | 1 | B | 2021-08-17 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, sweet grass | 0.0188 | 0.0546 | 18.4 | 0.01 | 0.34 | 0.31 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-1 | Kenai River, Alaska | KEN | T4 | 1 | C | 2021-08-17 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, sweet grass | 0.0172 | 0.0556 | 18.0 | 0.00 | 0.24 | 0.28 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-1 | Kenai River, Alaska | KEN | T4 | 1 | A | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, sweet grass | 0.0183 | 0.0549 | 13.3 | 0.00 | 0.18 | 0.31 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-1 | Kenai River, Alaska | KEN | T4 | 1 | B | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, sweet grass | 0.0188 | 0.0546 | 13.3 | 0.00 | 0.06 | 0.32 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-1 | Kenai River, Alaska | KEN | T4 | 1 | C | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, sweet grass | 0.0193 | 0.0543 | 13.5 | 0.00 | 0.01 | 0.33 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-1 | Kenai River, Alaska | KEN | T4 | 1 | A | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, sweet grass | 0.0188 | 0.0546 | 18.0 | 0.00 | 0.64 | 0.31 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-1 | Kenai River, Alaska | KEN | T4 | 1 | B | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, sweet grass | 0.0183 | 0.0549 | 18.9 | 0.00 | 0.03 | 0.30 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-1 | Kenai River, Alaska | KEN | T4 | 1 | C | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, sweet grass | 0.0162 | 0.0562 | 19.2 | 0.00 | 0.63 | 0.26 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-1 | Kenai River, Alaska | KEN | T4 | 1 | A | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, sweet grass | 0.0188 | 0.0546 | 14.6 | 0.00 | 0.03 | 0.31 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-1 | Kenai River, Alaska | KEN | T4 | 1 | B | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, sweet grass | 0.0183 | 0.0549 | 14.9 | 0.00 | 0.52 | 0.30 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-1 | Kenai River, Alaska | KEN | T4 | 1 | C | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, sweet grass | 0.0172 | 0.0556 | 14.1 | 0.00 | 0.04 | 0.28 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-2 | Kenai River, Alaska | KEN | T4 | 2 | A | 2021-08-17 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0183 | 0.0549 | 15.5 | 0.00 | 0.59 | 0.30 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-2 | Kenai River, Alaska | KEN | T4 | 2 | B | 2021-08-17 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, Carex spp. | 0.0188 | 0.0546 | 17.0 | 0.00 | 0.21 | 0.31 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-2 | Kenai River, Alaska | KEN | T4 | 2 | C | 2021-08-17 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, Triglochin spp., Carex spp. | 0.0183 | 0.0549 | 17.5 | 0.00 | 0.00 | 0.30 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-2 | Kenai River, Alaska | KEN | T4 | 2 | A | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0183 | 0.0549 | 13.0 | 0.00 | 0.22 | 0.31 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-2 | Kenai River, Alaska | KEN | T4 | 2 | B | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, Carex spp. | 0.0376 | 0.0549 | 13.3 | 0.00 | 0.04 | 0.63 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-2 | Kenai River, Alaska | KEN | T4 | 2 | C | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, Triglochin spp., Carex spp. | 0.0382 | 0.0546 | 13.7 | 0.01 | 0.30 | 0.64 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-2 | Kenai River, Alaska | KEN | T4 | 2 | A | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0172 | 0.0556 | 18.2 | 0.00 | 0.10 | 0.28 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-2 | Kenai River, Alaska | KEN | T4 | 2 | B | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, Carex spp. | 0.0376 | 0.0549 | 18.7 | 0.39 | 0.99 | 0.62 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-2 | Kenai River, Alaska | KEN | T4 | 2 | C | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, Triglochin spp., Carex spp. | 0.0387 | 0.0542 | 19.0 | 0.00 | 0.01 | 0.64 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-2 | Kenai River, Alaska | KEN | T4 | 2 | A | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0172 | 0.0556 | 17.6 | 0.00 | 0.11 | 0.28 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-2 | Kenai River, Alaska | KEN | T4 | 2 | B | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, Carex spp. | 0.0178 | 0.0553 | 18.0 | 0.01 | 0.65 | 0.29 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-2 | Kenai River, Alaska | KEN | T4 | 2 | C | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, Triglochin spp., Carex spp. | 0.0183 | 0.0549 | 18.5 | 0.00 | 0.33 | 0.30 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-3 | Kenai River, Alaska | KEN | T4 | 3 | A | 2021-08-16 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | litter, Triglochin spp. | 0.0172 | 0.0556 | 15.1 | 0.00 | 0.07 | 0.28 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-3 | Kenai River, Alaska | KEN | T4 | 3 | B | 2021-08-16 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, Triglochin spp. | 0.0178 | 0.0553 | 15.2 | 0.00 | 0.07 | 0.29 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-3 | Kenai River, Alaska | KEN | T4 | 3 | C | 2021-08-16 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground, Triglochin spp. | 0.0376 | 0.0549 | 15.2 | 0.02 | 0.75 | 0.62 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | A | 2021-08-17 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | Triglochin spp., Carex spp. | 0.0156 | 0.0566 | 16.4 | 0.01 | 0.96 | 0.25 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | B | 2021-08-17 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0183 | 0.0549 | 16.7 | 0.01 | 0.85 | 0.30 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | C | 2021-08-17 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | Triglochin spp., Carex spp. | 0.0178 | 0.0553 | 15.9 | 0.01 | 0.77 | 0.29 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | D | 2021-08-17 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | Triglochin spp., Carex spp. | 0.0359 | 0.0560 | 15.9 | 0.03 | 0.91 | 0.58 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | A | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | Triglochin spp., Carex spp. | 0.0370 | 0.0553 | 13.9 | 0.00 | 0.29 | 0.61 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | B | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0370 | 0.0553 | 14.5 | 0.00 | 0.01 | 0.61 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | C | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | Triglochin spp., Carex spp. | 0.0370 | 0.0553 | 15.7 | 0.00 | 0.03 | 0.61 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | D | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | Triglochin spp., Carex spp. | 0.0376 | 0.0549 | 16.1 | 0.00 | 0.09 | 0.62 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | A | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | Triglochin spp., Carex spp. | 0.0370 | 0.0553 | 19.6 | 0.02 | 0.84 | 0.60 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | B | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0178 | 0.0553 | 20.1 | 0.00 | 0.02 | 0.29 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | C | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | Triglochin spp., Carex spp. | 0.0370 | 0.0553 | 20.3 | 0.01 | 0.29 | 0.60 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | D | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | Triglochin spp., Carex spp. | 0.0364 | 0.0556 | 20.7 | 0.00 | 0.06 | 0.59 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | A | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | Triglochin spp., Carex spp. | 0.0167 | 0.0559 | 20.8 | 0.00 | 0.10 | 0.27 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | B | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | bare ground | 0.0172 | 0.0556 | 19.8 | 0.01 | 0.84 | 0.28 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | C | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | Triglochin spp., Carex spp. | 0.0353 | 0.0564 | 20.0 | 0.22 | 0.99 | 0.56 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-4 | Kenai River, Alaska | KEN | T4 | 4 | D | 2021-08-24 | Tidal flat | Saltwater, tidal regularly flooded | static chamber, portable GHG analyzer | Triglochin spp., Carex spp. | 0.0370 | 0.0553 | 12.3 | 0.00 | 0.08 | 0.62 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-5 | Kenai River, Alaska | KEN | T4 | 5 | A | 2021-08-16 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Carex spp., submerged | 0.0382 | 0.0546 | 19.4 | 3.76 | 1.00 | 0.63 | |
| AK-Land_2021_SAlaska_KEN21-T4-5 | Kenai River, Alaska | KEN | T4 | 5 | B | 2021-08-16 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Triglochin spp., submerged | 0.0188 | 0.0546 | 18.5 | 0.12 | 0.99 | 0.31 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-5 | Kenai River, Alaska | KEN | T4 | 5 | C | 2021-08-16 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Juncus spp., submerged | 0.0359 | 0.0560 | 17.7 | 0.63 | 1.00 | 0.58 | |
| AK-Land_2021_SAlaska_KEN21-T4-5 | Kenai River, Alaska | KEN | T4 | 5 | A | 2021-08-24 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Carex spp., submerged | 0.0364 | 0.0556 | 17.7 | 1.99 | 1.00 | 0.59 | |
| AK-Land_2021_SAlaska_KEN21-T4-5 | Kenai River, Alaska | KEN | T4 | 5 | B | 2021-08-24 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Triglochin spp., submerged | 0.0376 | 0.0549 | 17.5 | 0.51 | 0.75 | 0.62 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-5 | Kenai River, Alaska | KEN | T4 | 5 | C | 2021-08-24 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Juncus spp., submerged | 0.0353 | 0.0564 | 17.4 | 0.95 | 1.00 | 0.57 | |
| AK-Land_2021_SAlaska_KEN21-T4-5 | Kenai River, Alaska | KEN | T4 | 5 | A | 2021-08-24 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Carex spp., submerged | 0.0364 | 0.0556 | 18.7 | 2.73 | 0.99 | 0.59 | |
| AK-Land_2021_SAlaska_KEN21-T4-5 | Kenai River, Alaska | KEN | T4 | 5 | B | 2021-08-24 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Triglochin spp., submerged | 0.0382 | 0.0546 | 18.4 | 0.59 | 0.99 | 0.63 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-5 | Kenai River, Alaska | KEN | T4 | 5 | C | 2021-08-24 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Juncus spp., submerged | 0.0353 | 0.0564 | 18.4 | 0.94 | 1.00 | 0.56 | |
| AK-Land_2021_SAlaska_KEN21-T4-5 | Kenai River, Alaska | KEN | T4 | 5 | A | 2021-08-24 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Carex spp., submerged | 0.0370 | 0.0553 | 10.8 | 1.73 | 0.99 | 0.62 | |
| AK-Land_2021_SAlaska_KEN21-T4-5 | Kenai River, Alaska | KEN | T4 | 5 | B | 2021-08-24 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Triglochin spp., submerged | 0.0370 | 0.0553 | 10.5 | 0.72 | 0.99 | 0.62 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-5 | Kenai River, Alaska | KEN | T4 | 5 | C | 2021-08-24 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Juncus spp., submerged | 0.0347 | 0.0567 | 10.5 | 0.97 | 0.91 | 0.57 | |
| AK-Land_2021_SAlaska_KEN21-T4-6 | Kenai River, Alaska | KEN | T4 | 6 | A | 2021-08-16 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | submerged | 0.0292 | 0.0601 | 18.2 | 22.38 | 0.99 | 0.44 | |
| AK-Land_2021_SAlaska_KEN21-T4-6 | Kenai River, Alaska | KEN | T4 | 6 | B | 2021-08-16 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Sphagnum spp., Betula | 0.0335 | 0.0575 | 20.1 | 11.83 | 0.99 | 0.52 | |
| AK-Land_2021_SAlaska_KEN21-T4-6 | Kenai River, Alaska | KEN | T4 | 6 | C | 2021-08-16 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Equisetum spp., Betula | 0.0317 | 0.0586 | 18.4 | 35.32 | 0.99 | 0.49 | |
| AK-Land_2021_SAlaska_KEN21-T4-21 | Kenai River, Alaska | KEN | T4 | 21 | A | 2021-08-17 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Carex spp., Triglochin spp. | 0.0188 | 0.0546 | 17.6 | 0.14 | 1.00 | 0.31 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-21 | Kenai River, Alaska | KEN | T4 | 21 | B | 2021-08-17 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Carex spp., Triglochin spp. | 0.0193 | 0.0543 | 17.7 | 0.22 | 1.00 | 0.32 | Included as zero flux, therefore not discarded |
| AK-Land_2021_SAlaska_KEN21-T4-21 | Kenai River, Alaska | KEN | T4 | 21 | C | 2021-08-17 | Tidal flat | Temporarily irregularly flooded | static chamber, portable GHG analyzer | Carex spp., Triglochin spp. | 0.0359 | 0.0560 | 17.2 | 0.19 | 0.96 | 0.58 | Included as zero flux, therefore not discarded |