Public Data Products

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SPRUCE Microtopography of Experimental Plots Derived from Terrestrial Laser Scans Beginning in 2016

This dataset consists of maps and summaries of very high resolution (1 cm2) spatial data derived from terrestrial laser scans (TLS) characterizing the microtopography (hummocks and hollows) in 12 SPRUCE experimental plots from 2016-2018. The SPRUCE experiment is located in the S1-Bog of the Marcell Experimental Forest (MEF) near Grand Rapids, Minnesota. Additional data will be added through Summer 2021.

Citation: 

Graham, J.D., N.F. Glenn, L P. Spaete. 2019. SPRUCE Microtopography of Experimental Plots Derived from Terrestrial Laser Scans Beginning in 2016. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A.  https://doi.org/10.25581/spruce.068/1515553

SPRUCE Photosynthesis and Respiration of Rhododendron groenlandicum and Chamaedaphne calyculata in SPRUCE Experimental Plots, 2016

This data set contains biochemical and physiological data collected between June 2016 and May 2017 on two ericaceous shrub species, Chamadaphne calyculata and Rhododendron groenlandicum, at the SPRUCE (Spruce and Peatland Responses under Changing Environments) experiment to assess the response of peatland ecosystems to increases in whole ecosystem temperatures and elevated atmospheric CO2 concentrations.The SPRUCE experiment is located 40 km north of Grand Rapids, MN, in the USDA Forest Service Marcell Experimental Forest.

Citation: 

Ward EJ, Warren JM, McLennan D, Wullschleger SD. 2019. SPRUCE Photosynthesis and Respiration of Rhododendron groenlandicum and Chamaedaphne calyculata in SPRUCE Experimental Plots, 2016. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.061/1493603

SPRUCE Ground Observations of Phenology in Experimental Plots, 2018

This data set consists of phenological transition dates, as derived from direct observations of vegetative and reproductive phenology recorded by a human observer, from the SPRUCE experiment during 2018, the third full year of whole-ecosystem warming (Hanson et al. 2017). Both spring and autumn phenological events are included.

Citation: 

Schädel, C., W.R. Nettles, R.R. Heiderman, K. J. Pearson, A. D. Richardson, and P. J. Hanson. 2019. SPRUCE Ground Observations of Phenology in Experimental Plots, 2018. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.073/1557731

SPRUCE Vegetation Phenology in Experimental Plots from Phenocam Imagery, 2015-2018

This dataset consists of PhenoCam data from the SPRUCE experiment from the beginning of whole ecosystem warming (Hanson et al. 2017) in August 2015 through March-31 of 2019, with start- and end-of-season phenological transition dates derived through the end of autumn 2018.

Citation: 

Schädel, C., A.D. Richardson, K. Hufkens, T. Milliman, B. Seyednasrollah, W.R. Nettles, M.B. Krassovski, and P.J. Hanson. 2019. SPRUCE Vegetation Phenology in Experimental Plots from Phenocam Imagery, 2015-2018. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A.  https://doi.org/10.25581/spruce.071/1556082

SPRUCE: Hyperspectral Remote Sensing of Vegetation Communities in SPRUCE Experimental Plots, 2016

This data set consists of reflectance observations from hyperspectral remote sensing of the vegetation communities in SPRUCE experimental study plots located in the S1-Bog. Community vegetation plots in ten chambered treatment plots (6, 19, 11, 20, 4, 13, 8, 16, 10, 17) and 3 unchambered ambient plots (7, 14, 21) were scanned. Spectral data were collected on 22 September 2016 under clear sky conditions beginning at 1:00 p.m. local time.

Citation: 

McPartland, Mara Y., Falkowski, Michael J., Reinhardt, Jason R., Kane, Evan S., Kolka, Randy, Turetsky, Merritt R., Douglas, Thomas A., Anderson, John, Edwards, Jarrod D., Palik, Brian, and Montgomery, Rebecca A. 2019. SPRUCE: Hyperspectral Remote Sensing of Vegetation Communities in SPRUCE Experimental Plots, 2016. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.070/1546787

SPRUCE Tritium in Porewater of SPRUCE Experimental Plots and Neighboring Peatlands, and in Groundwater, Stream Water, and Precipitation of the S1 Bog, 2014-2016

This data set reports the tritium concentrations in (1) porewater from selected SPRUCE experimental plots located in the S1 bog and in (2) groundwater, streamwater, and precipitation in the S1 bog watershed, and (3) in porewater from the S2 bog, S3 fen, and Bog Lake fen. All sites are located at the USDA Forest Service, Marcell Experimental Forest (MEF) near Grand Rapids, MN. Samples were collected between June of 2014 and August of 2016.

Citation: 

Visser, A., N.A. Griffiths, and S.D. Sebestyen. 2019. SPRUCE Tritium in Porewater of SPRUCE Experimental Plots and Neighboring Peatlands, and in Groundwater, Stream Water, and Precipitation of the S1 Bog, 2014-2016. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.069/1532523

SPRUCE S1 Bog Pretreatment Seasonal Photosynthesis and Respiration of Trees, Shrubs, and Herbaceous Plants, 2010-2015

This data set contains the empirical biochemical, morphological, and physiological data collected between 2010 and 2015 on an herb (Maianthemum trifolium), understory shrubs (Rhododendron groenlandicum, Chamaedaphne calyculata, Kalmia polifolia and Vaccinium angustifolium) and  overstory trees (Picea mariana and Larix laricina) in the S1-Bog at the USDA Forest Service Marcell Experimental Forest (MEF) in northern Minnesota, USA.

Citation: 

Jensen AM, Warren JM, Hook LA, Wullschleger SD, Brice DJ, Childs J, Vander Stel HM. 2018. SPRUCE S1 Bog Pretreatment Seasonal Photosynthesis and Respiration of Trees, Shrubs, and Herbaceous Plants, 2010-2015. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.3334/CDIAC/spruce.008

SPRUCE Does dissolved organic matter or solid peat fuel anerobic respiration in peatlands?: Supporting Data

Hopple et al. (2019) investigated whether, as a primary substrate – dissolved organic matter (DOM) or solid peat – was driving anaerobic respiration at surface and at deep depth increments within two bogs and a poor fen in northern Minnesota. To address this question, they used a combination of soil laboratory incubations, as well as in-situ analyses of porewater dissolved organic carbon (DOC) concentrations and specific UV absorbance (SUVA) measurements. Soil samples were collected in June 2013 and July 2014, while porewater samples were taken in July 2013.

Citation: 

Hopple, A.M., L. Pfeifer-Meister, C.A. Zalman, J.K. Keller, M.M. Tfaily, R.M. Wilson, J.P. Chanton, and S.D. Bridgham. 2019. SPRUCE Does dissolved organic matter or solid peat fuel anaerobic respiration in peatlands?: Supporting Data. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.062/1500027

SPRUCE Total Gaseous Mercury Fluxes and Peat Mercury Concentrations, 2014-2015

This data set reports the results of total gaseous mercury (TGM) flux monitoring conducted in a sub-set of the SPRUCE experimental study enclosures (Plots 4, 6, 10, 13, 17 and 19) located in the S1 Bog. These plots were selected to represent duplicates of the +0, +4.5 and +9°C experimental temperature treatments.  Monitoring of TGM fluxes was conducted in May-June 2014, August 2014 and June 2015 to capture the influence of the deep (2 m below the ground surface) peat warming experiment.

Citation: 

Haynes, K.M., C.P.J. Mitchell, R.K. Kolka. 2019. SPRUCE Total Gaseous Mercury Fluxes and Peat Mercury Concentrations, 2014-2015. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.066/1512288

SPRUCE Outflow Total Mercury and Methylmercury from Experimental Plots, Beginning in 2017

This data set reports the results of total mercury and methylmercury analyses of the chemical analyses of outflow samples from the SPRUCE experimental study plots located in the S1-Bog. Sample collection and analyses started in April of 2017 and will continue for the duration of the experiment. Data will be added to this data set and released to the public periodically as quality assurance and publication of results are accomplished.

Citation: 

Pierce, C.E., S. Psarska, J. Brozowski, S.D. Sebestyen, R.K. Kolka, E.A. Nater, B.M. Toner. 2019. SPRUCE Outflow Total Mercury and Methylmercury from Experimental Plots, Beginning in 2017. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.065/1504234