Environmental and biological controls on carbon uptake phenology in permafrost affected boreal forests, Alaska, 2012-2022
This project aims to gain an improved understanding of the boreal forest carbon balance, including the seasonal contributions of carbon flux (μmol m^-2 s^-1) and the influence of key environmental conditions (e.g., soil moisture, soil temperature, and vegetation community characteristics) that regul...
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Arctic Data Center
2023
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Online Access: | https://doi.org/10.18739/A2P55DJ3K |
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dataone:doi:10.18739/A2P55DJ3K |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Arctic Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:ARCTIC |
language |
unknown |
topic |
Carbon Flux Methane Flux Boreal LTER Soil Respiration Active layer thickness Soil Moisture Soil Temperature Closed Chamber Vaccinium vitis-idaea Rhododendron groenlandicum Rhododendron tomentosum Cornus unalaschkensis Geocaulon lividum Vaccinium uliginosum picea mariana picea glauca Betula nenana/Betula glandulosa Betula neoalaskana populus tremuloides Alnus viridis Rosa acicularis Petasites frigidus Chamaenerion angustifolium Rubus chamaemorus |
spellingShingle |
Carbon Flux Methane Flux Boreal LTER Soil Respiration Active layer thickness Soil Moisture Soil Temperature Closed Chamber Vaccinium vitis-idaea Rhododendron groenlandicum Rhododendron tomentosum Cornus unalaschkensis Geocaulon lividum Vaccinium uliginosum picea mariana picea glauca Betula nenana/Betula glandulosa Betula neoalaskana populus tremuloides Alnus viridis Rosa acicularis Petasites frigidus Chamaenerion angustifolium Rubus chamaemorus Jennifer Watts Jonas Noomah Environmental and biological controls on carbon uptake phenology in permafrost affected boreal forests, Alaska, 2012-2022 |
topic_facet |
Carbon Flux Methane Flux Boreal LTER Soil Respiration Active layer thickness Soil Moisture Soil Temperature Closed Chamber Vaccinium vitis-idaea Rhododendron groenlandicum Rhododendron tomentosum Cornus unalaschkensis Geocaulon lividum Vaccinium uliginosum picea mariana picea glauca Betula nenana/Betula glandulosa Betula neoalaskana populus tremuloides Alnus viridis Rosa acicularis Petasites frigidus Chamaenerion angustifolium Rubus chamaemorus |
description |
This project aims to gain an improved understanding of the boreal forest carbon balance, including the seasonal contributions of carbon flux (μmol m^-2 s^-1) and the influence of key environmental conditions (e.g., soil moisture, soil temperature, and vegetation community characteristics) that regulate carbon loss. This dataset includes chamber-based carbon dioxide (CO2) and methane (CH4) fluxes and environmental variables along a 300m slopeside lowland-to-upland forest transect within the Caribou-Poker Creek Research Watershed northeast of Fairbanks, Alaska. The transect spans lower-hillslope black spruce (Picea mariana), mid-slope white spruce (Picea glauca ) and upper-slope deciduous (Betula neoalaskana, Populus tremuloides) dominated tree stands. Two closed chambers, attached to a portable LICOR LI-7810 gas analyzer, were used to measure CO2 and CH4 fluxes at collars along the transect. Soil respiration (including autotrophic respiration from roots, and microbial respiration) was measured at 21 collars where aboveground vegetation had been clipped and removed prior to the study, using a pressure, temperature, and humidity controlled LI-COR Smart Chamber. We also used an acrylic clear chamber at 10 locations over intact ecosystems (i.e., where vegetation was not removed) along the transect to measure net ecosystem CO2 and CH4 exchange and net ecosystem emission (e.g,. clear chamber was covered to create no-light conditions, preventing carbon uptake through photosynthesis). The dataset also contains environmental variables that may be correlated with carbon flux. These include soil moisture (m^3 m^-3), soil temperature (°C), thaw depth (cm), and photosynthetically active radiation (PAR, μmol m^-2 s^-1) along the transect. Sensor arrays at each end of the transect collected soil moisture and soil temperature at 20cm and 40cm depth, as well as PAR and air temperature (°C). Analysis of these data can help determine which environmental variables are controls of soil respiration and photosynthetic uptake. Smart Chamber data are available weekly May-September 2021 and every other week May-August 2022. Clear chamber date are available weekly July-August 2022. Sensor array data are available June 2021-August 2022 with some gaps. |
format |
Dataset |
author |
Jennifer Watts Jonas Noomah |
author_facet |
Jennifer Watts Jonas Noomah |
author_sort |
Jennifer Watts |
title |
Environmental and biological controls on carbon uptake phenology in permafrost affected boreal forests, Alaska, 2012-2022 |
title_short |
Environmental and biological controls on carbon uptake phenology in permafrost affected boreal forests, Alaska, 2012-2022 |
title_full |
Environmental and biological controls on carbon uptake phenology in permafrost affected boreal forests, Alaska, 2012-2022 |
title_fullStr |
Environmental and biological controls on carbon uptake phenology in permafrost affected boreal forests, Alaska, 2012-2022 |
title_full_unstemmed |
Environmental and biological controls on carbon uptake phenology in permafrost affected boreal forests, Alaska, 2012-2022 |
title_sort |
environmental and biological controls on carbon uptake phenology in permafrost affected boreal forests, alaska, 2012-2022 |
publisher |
Arctic Data Center |
publishDate |
2023 |
url |
https://doi.org/10.18739/A2P55DJ3K |
op_coverage |
Location description: The research site is a south-facing slope in the Caribou-Poker Research Watershed northeast of Fairbanks, Alaska. The NW and SE coordinates are the endpoints of a 300m transect that contains all plots, with Plot 1 being the lower-elevation SE point, and Plot 21 being the higher-elevation NW point. The transect spans a section of relatively undisturbed boreal forest, with a black spruce-dominated canopy at the lower elevations (Plots 1-13) and a deciduous-dominated canopy at the higher elevations (Plots 14-21). Plots 1-21 are approximately 16m apart along the transect, and contain collars for LI-COR SmartChamber measurements. Clear chamber collars are located at Plots 1, 2, 5, 8, 10, 12, 14, 16, 18, and 20. WTT1 is a sensor array co-located with Plot 1. WTT2 and WTT3 are sensor arrays co-located with plots 20 and 21, respectively. The transition from the black spruce stands to a deciduous-dominated canopy occurs at Plot 13. A NEON eddy-covariance tower is located approximately 40m SW of Plot 1. ECOSYSTEM CHARACTERISTICS Ground cover varied along the transect. Plots 1-6 are lichen dominated, while plots 7-13 are completely covered by deep moss. Plots 14-21 are a mosaic of shallow moss and litter-covered bare ground. The woody evergreens Vaccinium vitis-idaea and Rhododendron groenlandicum are common across the entire transect and can grow densely. Small forbs (including Cornus unalaskensis and Geocaulon lividum) and graminoids are common but sparse. Shrubby Salix spp. can be found throughout the transect, while Betula nenana/Betula glandulosa can be found among the black spruce. Depth to mineral soil (measured from the top of the live moss or litter layer) was moderate (8.5-18.5cm) in the lower-slope (plots 1-6), great (21-35cm) in the mid-slope (plots 7-13), and shallow (5.5-15cm) in upper-slope (plots 14-21). ENVELOPE(-147.50148,-147.49976,65.15748,65.15479) BEGINDATE: 2021-04-26T00:00:00Z ENDDATE: 2022-08-10T00:00:00Z |
long_lat |
ENVELOPE(-141.005,-141.005,64.056,64.056) ENVELOPE(-147.50148,-147.49976,65.15748,65.15479) |
geographic |
Fairbanks Poker Creek |
geographic_facet |
Fairbanks Poker Creek |
genre |
Active layer thickness Caribou-Poker Creek Research Watershed permafrost Rubus chamaemorus Alaska |
genre_facet |
Active layer thickness Caribou-Poker Creek Research Watershed permafrost Rubus chamaemorus Alaska |
op_doi |
https://doi.org/10.18739/A2P55DJ3K |
_version_ |
1782012101584224256 |
spelling |
dataone:doi:10.18739/A2P55DJ3K 2023-11-08T14:14:08+01:00 Environmental and biological controls on carbon uptake phenology in permafrost affected boreal forests, Alaska, 2012-2022 Jennifer Watts Jonas Noomah Location description: The research site is a south-facing slope in the Caribou-Poker Research Watershed northeast of Fairbanks, Alaska. The NW and SE coordinates are the endpoints of a 300m transect that contains all plots, with Plot 1 being the lower-elevation SE point, and Plot 21 being the higher-elevation NW point. The transect spans a section of relatively undisturbed boreal forest, with a black spruce-dominated canopy at the lower elevations (Plots 1-13) and a deciduous-dominated canopy at the higher elevations (Plots 14-21). Plots 1-21 are approximately 16m apart along the transect, and contain collars for LI-COR SmartChamber measurements. Clear chamber collars are located at Plots 1, 2, 5, 8, 10, 12, 14, 16, 18, and 20. WTT1 is a sensor array co-located with Plot 1. WTT2 and WTT3 are sensor arrays co-located with plots 20 and 21, respectively. The transition from the black spruce stands to a deciduous-dominated canopy occurs at Plot 13. A NEON eddy-covariance tower is located approximately 40m SW of Plot 1. ECOSYSTEM CHARACTERISTICS Ground cover varied along the transect. Plots 1-6 are lichen dominated, while plots 7-13 are completely covered by deep moss. Plots 14-21 are a mosaic of shallow moss and litter-covered bare ground. The woody evergreens Vaccinium vitis-idaea and Rhododendron groenlandicum are common across the entire transect and can grow densely. Small forbs (including Cornus unalaskensis and Geocaulon lividum) and graminoids are common but sparse. Shrubby Salix spp. can be found throughout the transect, while Betula nenana/Betula glandulosa can be found among the black spruce. Depth to mineral soil (measured from the top of the live moss or litter layer) was moderate (8.5-18.5cm) in the lower-slope (plots 1-6), great (21-35cm) in the mid-slope (plots 7-13), and shallow (5.5-15cm) in upper-slope (plots 14-21). ENVELOPE(-147.50148,-147.49976,65.15748,65.15479) BEGINDATE: 2021-04-26T00:00:00Z ENDDATE: 2022-08-10T00:00:00Z 2023-01-01T00:00:00Z https://doi.org/10.18739/A2P55DJ3K unknown Arctic Data Center Carbon Flux Methane Flux Boreal LTER Soil Respiration Active layer thickness Soil Moisture Soil Temperature Closed Chamber Vaccinium vitis-idaea Rhododendron groenlandicum Rhododendron tomentosum Cornus unalaschkensis Geocaulon lividum Vaccinium uliginosum picea mariana picea glauca Betula nenana/Betula glandulosa Betula neoalaskana populus tremuloides Alnus viridis Rosa acicularis Petasites frigidus Chamaenerion angustifolium Rubus chamaemorus Dataset 2023 dataone:urn:node:ARCTIC https://doi.org/10.18739/A2P55DJ3K 2023-11-08T13:48:26Z This project aims to gain an improved understanding of the boreal forest carbon balance, including the seasonal contributions of carbon flux (μmol m^-2 s^-1) and the influence of key environmental conditions (e.g., soil moisture, soil temperature, and vegetation community characteristics) that regulate carbon loss. This dataset includes chamber-based carbon dioxide (CO2) and methane (CH4) fluxes and environmental variables along a 300m slopeside lowland-to-upland forest transect within the Caribou-Poker Creek Research Watershed northeast of Fairbanks, Alaska. The transect spans lower-hillslope black spruce (Picea mariana), mid-slope white spruce (Picea glauca ) and upper-slope deciduous (Betula neoalaskana, Populus tremuloides) dominated tree stands. Two closed chambers, attached to a portable LICOR LI-7810 gas analyzer, were used to measure CO2 and CH4 fluxes at collars along the transect. Soil respiration (including autotrophic respiration from roots, and microbial respiration) was measured at 21 collars where aboveground vegetation had been clipped and removed prior to the study, using a pressure, temperature, and humidity controlled LI-COR Smart Chamber. We also used an acrylic clear chamber at 10 locations over intact ecosystems (i.e., where vegetation was not removed) along the transect to measure net ecosystem CO2 and CH4 exchange and net ecosystem emission (e.g,. clear chamber was covered to create no-light conditions, preventing carbon uptake through photosynthesis). The dataset also contains environmental variables that may be correlated with carbon flux. These include soil moisture (m^3 m^-3), soil temperature (°C), thaw depth (cm), and photosynthetically active radiation (PAR, μmol m^-2 s^-1) along the transect. Sensor arrays at each end of the transect collected soil moisture and soil temperature at 20cm and 40cm depth, as well as PAR and air temperature (°C). Analysis of these data can help determine which environmental variables are controls of soil respiration and photosynthetic uptake. Smart Chamber data are available weekly May-September 2021 and every other week May-August 2022. Clear chamber date are available weekly July-August 2022. Sensor array data are available June 2021-August 2022 with some gaps. Dataset Active layer thickness Caribou-Poker Creek Research Watershed permafrost Rubus chamaemorus Alaska Arctic Data Center (via DataONE) Fairbanks Poker Creek ENVELOPE(-141.005,-141.005,64.056,64.056) ENVELOPE(-147.50148,-147.49976,65.15748,65.15479) |