Project-Only Data Products

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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: Vegetation Community Survey Data from SPRUCE Experimental Plots, 2014-2018

This dataset provides vegetation survey data collected across vegetation community plots within the 10 chambered treatment plots (6, 19, 11, 20, 4, 13, 8, 16, 10, 17) and 3 unchambered ambient plots (7, 14, 21) of the SPRUCE experiment project in 2014-2018. The vegetation community plots, three in each experimental plot, were established in 2014 and designated to be undisturbed and reserved for long-term sampling. Vegetation survey data were collected at the peak of each growing season by placing a 1x2 meter rectangular grid over each community plot.

Citation: 

McPartland, M.Y., M.J., Kolka, R., M.R., Palik, B., and Montgomery, R.A. 2019. SPRUCE: Vegetation Community Survey Data from SPRUCE Experimental Plots, 2014-2018. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A.  https://doi.org/10.25581/spruce.059/1499107

SPRUCE Manual Phenology Observations and Photographs Beginning in 2010

Periodic observations of the phenology of vegetation bud swell, leaf out, leaf off, flowering, fruiting and the nature of snow cover and ice presence have been assessed by SPRUCE project personnel since 2010. These observations are supplemented by the collection of images from periodic photographs. Annual summaries of vegetation phenology and snow and ice presence are also provided.

Citation: 

Heiderman RR, Nettles WR, Ontl TA, Latimer JM, Richardson AD, Hanson PJ (2018) SPRUCE Manual Phenology Observations and Photographs Beginning in 2010.  Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.054/1444106

SPRUCE: Manual Minirhizotron Images from Experimental Plots Beginning in 2013

This data set consists of images of fine-root birth, growth, and death collected using non-destructive minirhizotron technology from a warming × CO2 enrichment experiment in a forested, ombrotrophic bog. Minirhizotron images were collected ~ weekly or bi-weekly beginning in 2013 in the 12 SPRUCE experimental plots in paired hummock and hollow microtopography.

Citation: 

Childs J, Iversen CM, Latimer J, Burnham A, Norby RJ. 2019. SPRUCE Manual Minirhizotron Images from Experimental Plots Beginning in 2013. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.060/1490356

SPRUCE: LAI Data from SPRUCE Experimental Plots, 2017-2018

This dataset provides leaf area index (LAI) data collected across vegetation community plots within the 10 chambered treatment plots (6, 19, 11, 20, 4, 13, 8, 16, 10, 17) and 3 unchambered ambient plots (7, 14, 21) of the SPRUCE experiment project in 2017 and 2018. The vegetation community plots were established in 2014 and designated to be undisturbed and reserved for long-term sampling. LAI measurements were collected using a LICOR-LAI 2200 instrument over a standard 1x2 meter rectangular sampling frame with 50 20x20 cm grid cells.

Citation: 

McPartland, M.Y., Kane, E.S., Falkowski, M.J., Kolka, R., Turetsky, M.R., Palik, B., and Montgomery, R.A. 2019. SPRUCE: LAI Data from SPRUCE Experimental Plots, 2017-2018. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.058/1491566

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 Bog Surface Elevation Assessments with SET Instrument Beginning in 2013

This data set reports plot-specific bog surface elevation measurements collected with the SPRUCE Elevation Transect (SET) instrument. Measurements are reported as absolute elevation in meters above mean sea level for two locations in each of the SPRUCE experimental treatment plots and additional ambient boardwalk plots -- 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 19, 20 and 21.

This data set reports measurements collected from June 2013 through August 2018, but it will be appended annually as new data are collected.

Citation: 

Hanson, P.J., J.R. Phillips, D.J. Brice, L.A. Hook 2018. SPRUCE Bog Surface Elevation Assessments with SET Instrument Beginning in 2013. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.055/1455014

SPRUCE Tree Growth Assessments of Picea and Larix in S1-Bog Plots and SPRUCE Experimental Plots beginning in 2011

This data set reports tree growth measurements of mature Picea mariana and Larix laricina located in the S1-Bog permanent plots and the SPRUCE experimental study plots.

Annual data collections were initiated in February of 2011and have been continued on an annual basis during mid-winter observation periods at the end of February or early March.  Data collections are anticipated to continue through February of 2025 and this data set will be appended annually.

Citation: 

Hanson, P.J., J.R. Phillips, Stan D. Wullschelger, W. Robert Nettles, Jeffrey M. Warren, Eric J. Ward. 2018. SPRUCE Tree Growth Assessments of Picea and Larix in S1-Bog Plots and SPRUCE Experimental Plots beginning in 2011. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.051/1433836

SPRUCE Large-Collar In Situ CO2 and CH4 Flux Data for the SPRUCE Experimental Plots: Whole-Ecosystem-Warming

This data set reports community-level CO2 and CH4 flux measurements for the SPRUCE experimental study plots located in the S1-Bog.

Citation: 

Hanson, P.J., J.R. Phillips, J.S. Riggs, and W.R. Nettles. 2017. SPRUCE Large-Collar In Situ CO2 and CH4 Flux Data for the SPRUCE Experimental Plots: Whole-Ecosystem-Warming. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. http://dx.doi.org/10.3334/CDIAC/spruce.034

SPRUCE Peat Mercury, Methylmercury and Sulfur Concentrations from Experimental Plot Cores, 2012

In support of:  Furman, Olha S., M. M. Tfaily, S. L. Nicholas, J. C. Wasik, S. D. Sebestyen, R. K. Kolka, E. A. Nater, and B. M. Toner (in progress). Co-cycling of sulfur and mercury within the zone of water-table fluctuations in organic soils. Environmental Science & Technology.

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Citation: 

Furman, Olha S., M.M. Tfaily, S.L. Nicholas, J.C. Wasik, S.D. Sebestyen, R.K. Kolka, E.A. Nater, B.M. Toner. 2016. SPRUCE Peat Mercury, Methylmercury and Sulfur Concentrations from Experimental Plot Cores, 2012.Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. http://dx.doi.org/10.3334/CDIAC/spruce.027