Radiocarbon in CO2 and Soil Organic Matter from Laboratory Incubations, Utqiagvik (Barrow), Alaska, 2012

DOI: https://doi.org/10.5440/1418852
Get Data
NGEE Arctic Record ID: NGA149
Data Version: 1.0
Abstract

Dataset includes one CSV data file of Delta14C measurements made from soil organic matter and CO2 from laboratory soil incubations of active layer soils collected in Utqiagvik (Barrow), Alaska in 2012. In addition to Delta14CO2, the 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. The Next-Generation Ecosystem Experiments: Arctic (NGEE Arctic), was a 10-year research effort (2012-2022) 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) 000000019337464X
Margaret Torn (mstorn@lbl.gov) 0000000281740099
---more---
Dataset Citation
Lydia Vaughn, Margaret Torn. 2018. Radiocarbon in CO2 and Soil Organic Matter from Laboratory Incubations, Utqiagvik (Barrow), Alaska, 2012. 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/10.5440/1418852.
Dates
2012-08-14 - 2012-10-22
Geographic Location
NGEE Arctic Utqiagvik (Barrow), Alaska
North71.35
South71.2
East-156.4
West-156.7
Place Keywords:
Intensive Site 0 | Area B | AB Transect | Utqiagvik, Alaska | Area A | Barrow Environmental Observatory | Barrow, Alaska | Area C | Intensive Site 1
Subject Keywords:
Natural abundance radiocarbon | Delta14CO2 | Radiocarbon in CO2 | Radiocarbon in soil | Carbon mineralization | CO2 production rate | Soil organic matter geochemistry | Soil organic matter nitrogen concentration | Soil organic matter carbon concentration |
GCMD Keywords
EARTH SCIENCE > LAND SURFACE > SOILS
Methodology
Soil cores for laboratory incubations were collected using manual push corers and held at 5 degrees C until beginning of incubation. Soils were then divided by horizon, living vegetation was removed from surface layer, and samples were incubated individually in glass jars. Incubations were conducted in 3 sequential periods. In period 1, soils were incubated at 5 degrees C for 13 days; in period 2, soils were incubated at 10 degrees C for 16 days; in period 3, soils were incubated at 5 degrees C for 21 days. CO2 for radiocarbon analysis was collected at the end of each period into evacuated stainless steel sampling canisters or glass vials. Incubation jars were flushed with CO2-free air prior to each incubation period. Headspace CO2 concentrations in incubation jars were not permitted to exceed 20,000 ppm. For all Delta14CO2 measurements, CO2 was cryogenically purified and reduced to graphite prior to Delta14C analysis with accelerator mass spectrometry (AMS). Following incubations, remaining soil organic matter from incubated soils was combusted to CO2, which was then processed for Delta14C as CO2 from gas samples. Delta13C analyses for use in Delta14C calculations were performed at the UC Davis Stable Isotope Laboratory. In the data file, not measured, not applicable, and missing values are represented by "NA".
Related References
Vaughn, Lydia J. S., Torn, Margaret S. 2019. 14C evidence that millennial and fast-cycling soil carbon are equally sensitive to warming. Nature Climate Change. 467- 471 vol. 9. issue 6. https://doi.org/10.1038/s41558-019-0468-y
Related Identifiers
Identifier:
Type:
Relation:
N/A
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