Radiocarbon in CO2 and Soil Organic Matter from Laboratory Incubations, Utqiagvik (Barrow), Alaska, 2014

DOI: https://doi.org/10.5440/1418853
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NGEE Arctic Record ID: NGA150
Data Version: 1.0
Abstract

Dataset includes 14C measurements made from soil organic matter and CO2 from paired anaerobic and aerobic laboratory soil incubations of active layer soils collected in Barrow, Alaska in 2014. In addition to 14CO2, dataset includes CO2 production rates and carbon and nitrogen concentrations. Samples were collected from intensive study site 1 areas A, B, and C, and the site 0 and AB transects, from specified positions in high-centered, flat-centered, and low centered polygons. This dataset contains one csv file and one pdf file. 

The Next-Generation Ecosystem Experiments: Arctic (NGEE Arctic), was a research effort to reduce uncertainty in Earth System Models by developing a predictive understanding of carbon-rich Arctic ecosystems and feedbacks to climate. NGEE Arctic was supported by the Department of Energy's Office of Biological and Environmental Research.

The NGEE Arctic project had two field research sites: 1) located within the Arctic polygonal tundra coastal region on the Barrow Environmental Observatory (BEO) and the North Slope near Utqiagvik (Barrow), Alaska and 2) multiple areas on the discontinuous permafrost region of the Seward Peninsula north of Nome, Alaska.

Through observations, experiments, and synthesis with existing datasets, NGEE Arctic provided an enhanced knowledge base for multi-scale modeling and contributed to improved process representation at global pan-Arctic scales within the Department of Energy's Earth system Model (the Energy Exascale Earth System Model, or E3SM), and specifically within the E3SM Land Model component (ELM).

Authors
Lydia Vaughn (lydiajsmith@lbl.gov) 0000-0001-9337-464X
Margaret Torn (mstorn@lbl.gov) 0000-0002-8174-0099
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Dataset Citation
Lydia Vaughn, Margaret Torn. 2018. Radiocarbon in CO2 and Soil Organic Matter from Laboratory Incubations, Utqiagvik (Barrow), Alaska, 2014. Next Generation Ecosystem Experiments Arctic Data Collection, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee, USA. Dataset accessed on [INSERT_DATE] at https://doi.org/10.5440/1418853.
Dates
2014-09-08 - 2015-10-13
Geographic Location
NGEE Arctic Utqiagvik (Barrow), Alaska
North71.35
South71.2
East-156.4
West-156.7
Place Keywords:
Area B | Barrow, Alaska | AB Transect | Utqiagvik, Alaska | Barrow Environmental Observatory | Area C | Intensive Site 1 | Intensive Site 0 | Area A
Subject Keywords:
Natural abundance radiocarbon | Radiocarbon in soil | Radiocarbon in CO2 | Delta14CO2 | Carbon mineralization | CO2 production | Soil organic matter geochemistry | Soil organic matter nitrogen concentration | Soil organic matter carbon concentration |
GCMD Keywords
N/A
Methodology
Active layer soil cores for laboratory incubations were collected using manual push corers and held at 5 degrees C until beginning of incubation. Living vegetation was removed from surface layer, and cores were divided into 2 equal depth increments. If the sample location had standing water at the surface, soils were divided into water and sediment layers. Deep-layer samples were divided vertically into two subsamples. Subsamples were incubated individually in glass jars and 3 degrees C for 379 days. Shallow-layer samples and one deep-layer subsample were incubated aerobically with a headspace of CO2-free air. One deep-layer subsample from each core was incubated anaerobically with a headspace of N2. Headspace CO2 concentrations were measured every 3 weeks. Cumulative CO2 for radiocarbon analysis was collected into evacuated stainless steel sampling canisters or glass vials. Headspace CO2 concentrations in incubation jars were not permitted to exceed 20,000 ppm. For all 14CO2 measurements, CO2 was cryogenically purified and reduced to graphite prior to 14C analysis with accelerator mass spectrometry (AMS). Following incubations, soils were freeze-dried, and soil organic matter was combusted to CO2, which was then processed for 14C as CO2 from gas samples. 13C analyses for use in 14C calculations were performed at the UC Davis Stable Isotope Laboratory.
Related References
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Related Identifiers
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Metadata Contact
Contact information for the individual or organization that is knowledgeable about the data.
Person: Lydia Vaughn
Organization: Lawrence Berkeley National Laboratory
Email: lydiajsmith@lbl.gov
Point of Contact
Contact information for the individual or organization that is knowledgeable about the data.
Person: Lydia Vaughn
Organization: Lawrence Berkeley National Laboratory
Email: lydiajsmith@lbl.gov
Dataset Usage Rights
Public Datasets

This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0.

See the NGEE Arctic Data Policies for more details https://ngee-arctic.ornl.gov/data-policies.

Distribution Point of Contact
Contact: Data Center Support
Organization: Next-Generation Ecosystem Experiments (NGEE) Arctic Project, Oak Ridge National Laboratory
Email: support@ngee-arctic.ornl.gov