SPRUCE S1 bog Sphagnum CO2 flux measurements and partitioning into Re and GPP

Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Walker, Anthony P.
Originator: Carter, Kelsey R.
Originator: Hanson, Paul J.
Originator: Nettles, W. Robert
Originator: Phillips, Jane R.
Originator: Sebestyen, Stephen D.
Originator: Weston, David J.
Publication_Date: 2017
Title:
SPRUCE S1 bog Sphagnum CO2 flux measurements and partitioning into Re and GPP
Geospatial_Data_Presentation_Form: tabular digital data
Publication_Information:
Publication_Place: Oak Ridge, TN
Publisher: U.S. Department of Energy, Oak Ridge National Laboratory, Carbon Dioxide Information Analysis Center
Online_Linkage: https://doi.org/10.3334/CDIAC/spruce.039
Description:
Abstract:
This data set provides (1) the results of in-situ Sphagnum-peat hourly net ecosystem exchange (NEE) measured using a LICOR 8100 gas exchange system and (2) the component fluxes -- gross primary production (GPP) and ecosystem respiration (Re), derived using empirical regressions.

NEE measurements were made from 6 June to 6 November 2014 and 20 March to 10 May 2015. Three 8100 chambers per dominant species (S. magellanicum or S. fallax) were placed in the S1 Bog in relatively open ground where there was no obvious hummock-hollow microtopography. The 8100 chambers were not located in the SPRUCE experimental enclosures. Measured site meteorological data used as model drivers are also included.
Purpose:
SPRUCE (Spruce and Peatland Responses Under Climatic and Environmental Change) is an experiment to assess the response of northern peatland ecosystems to increases in temperature and exposures to elevated atmospheric carbon dioxide (CO2) concentrations. It is a key component of the Terrestrial Ecosystem Science Scientific Focus Area of Oak Ridge National Laboratory's (ORNL) Climate Change Program, focused on terrestrial ecosystems and the mechanisms that underlie their responses to climatic change. The experimental work is to be conducted in a Picea mariana [black spruce] - Sphagnum [peat moss] spp. bog forest in northern Minnesota, 40 kilometers (km) north of Grand Rapids, in the USDA Forest Service Marcell Experimental Forest (MEF). The site is located at the southern margin of the boreal forest. It is an ecosystem considered especially vulnerable to climate change, and anticipated to be near its tipping point with respect to climate change. Responses to warming and interactions with increased atmospheric CO2 concentration are anticipated to have important feedbacks on the atmosphere and climate, because of the high carbon stocks harbored by peatlands.

Experimental work in the 8.1-hectare (ha) S1 bog will be a climate change manipulation focusing on the combined responses to multiple levels of warming at ambient or elevated CO2 (eCO2) levels. The experiment provides a platform for testing mechanisms controlling the vulnerability of organisms, biogeochemical processes and ecosystems to climatic change (e.g., thresholds for organism decline or mortality, limitations to regeneration, biogeochemical limitations to productivity, the cycling and release of CO2 and methane (CH4) to the atmosphere).

The manipulation will evaluate the response of the existing biological communities to a range of warming levels from ambient to +9°Celsius (C), provided via large, modified open-top enclosures. All temperatures, ambient through the +9°C warming treatment, will also be conducted at eCO2 (in the range of 800 to 900 parts per million [ppm]). Both direct and indirect effects of these experimental perturbations will be analyzed to develop and refine models needed for full Earth system analyses.
Supplemental_Information:
The original date of this metadata file was 05/03/2018. Minor metadata updates were made on 05/30/2019.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20140606
Ending_Date: 20150510
Currentness_Reference:
Observed
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Description_of_Geographic_Extent:
All measurements were made at the 8.1-ha S1 bog forest site in northern Minnesota, 40 km north of Grand Rapids, in the USDA Forest Service Marcell Experimental Forest (MEF). These coordinates are the central location of the S1 bog.
Bounding_Coordinates:
West_Bounding_Coordinate: -93.48283
East_Bounding_Coordinate: -93.48283
North_Bounding_Coordinate: 47.50285
South_Bounding_Coordinate: 47.50285
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: bog
Theme_Keyword: peatland
Theme_Keyword: carbon dioxide
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: biota
Theme_Keyword: climatologyMeteorologyAtmosphere
Theme:
Theme_Keyword_Thesaurus: National Research & Development Taxonomy
Theme_Keyword: Climate change
Theme_Keyword: Ecological adaptation
Theme_Keyword: Ecology, Ecosystems, & Environment
Theme_Keyword: Plant ecology
Theme_Keyword: Soil
Theme_Keyword: Inventory, Monitoring, & Analysis
Theme_Keyword: Monitoring
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Marcell Experimental Forest
Place_Keyword: Chippewa National Forest
Place_Keyword: Minnesota
Access_Constraints: These data are available through the Oak Ridge National Laboratory (ORNL) Carbon Dioxide Information Analysis Center (CDIAC).
Use_Constraints:
If you use these data in a publication, presentation, or other research product please use the following citation:

Walker, Anthony P.; Carter, Kelsey R.; Hanson, Paul J.; Nettles, W. Robert; Phillips, Jane R.; Sebestyen, Stephen D.; Weston, David J. 2017. SPRUCE S1 bog Sphagnum CO2 flux measurements and partitioning into Re and GPP. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.3334/CDIAC/spruce.039
Data_Set_Credit:
Research sponsored by the Office of Biological and Environmental Research within the U.S. Department of Energy’s Office of Science.

The SPRUCE experiment is a multi-year cooperative interaction among scientists of the Oak Ridge National Laboratory operated by UT-Battelle, LLC and the U.S. Forest Service, Northern Research Station, Marcell Experimental Forest.
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Data_Quality_Information:
Logical_Consistency_Report:
see full data documentation, available from the ORNL repository
Completeness_Report:
see full data documentation, available from the ORNL repository
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Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
See the complete metadata available from the Oak Ridge National Laboratory repository.
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Metadata_Reference_Information:
Metadata_Date: 20190530
Metadata_Standard_Name: FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001.1-1999
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