Public Data Products

Displaying 51 - 60 of 70

SPRUCE S1 Bog Plant-Available Nutrients Assessed with Ion-Exchange Resins from 2011-2012 in the Southern End of the S1 Bog

This data set consists of observations of plant-available nutrients assessed using ion-exchange resin capsules incubated serially in aerobic and anaerobic peat layers beginning in 2011. Data were collected from 2011 to 2012 (prior to the construction of the SPRUCE experimental plots) at the southern end of the S1 Bog at three depths in hollow microtopography only. The experimental work was conducted in a Picea mariana [black spruce] – Sphagnum spp.

Citation: 

Iversen CM, Ontl TA, Brice DJ, Childs J. 2017. SPRUCE S1 Bog Plant-Available Nutrients Assessed with Ion-Exchange Resins from 2011-2012 in the Southern End of the S1 Bog.Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.3334/CDIAC/spruce.022.

 

SPRUCE S1 Bog Tree Basal Area and Understory Community Composition Assessed in the Southern and Northern Ends of the S1 Bog

The composition and cover of woody and understory species, along with the timing of stem growth, were characterized near minirhizotron installations at the south and north ends of the S1 bog in order to understand the relationship between root dynamics and the surrounding plant communities.
There are three data streams:
(1) Woody species basal area -- the number, basal area, and distance from the center point of all trees within a 5-m radius of each minirhizotron pair, which were quantified in 2011,

Citation: 

Iversen CM, Garrett A, Martin A, Turetsky MR, Norby RJ, Childs J, Ontl TA. 2017. SPRUCE S1 Bog Tree Basal Area and Understory Community Composition Assessed in the Southern and Northern Ends of the S1 Bog. 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.024

SPRUCE S1 Bog Areal Coverage of Hummock and Hollow Microtopography Assessed Along Three Transects in the S1 Bog

Aerial coverage of hummocks and hollows was estimated in July 2012 in ten 4 m × 4 m plots each along three 60-m t transects (30 plots total) in the S1-Bog. Hollows were defined as the lowest elevation within plots and were typically at or near the height of the water table, hummocks included area above hollows, including the sides of the hummocks.

The experimental work was conducted in a Picea mariana [black spruce] – Sphagnum spp. bog forest in northern Minnesota, 40 km north of Grand Rapids, in the USDA Forest Service Marcell Experimental Forest (MEF).

Citation: 

Ontl TA, Iversen CM. 2017. SPRUCE S1 Bog Areal Coverage of Hummock and Hollow Microtopography Assessed Along Three Transects in the S1 Bog. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://dx.doi.org/10.3334/CDIAC/spruce.023

SPRUCE S1 Bog Fine-root Production and Standing Crop Assessed with Minirhizotrons in the Southern and Northern Ends of the S1 Bog

This data set reports fine-root peak growth and standing crop measurements from a forested, ombrotrophic bog as determined using non-destructive minirhizotron technology.

Citation: 

Iversen CM, Childs J, Norby RJ, Garrett A, Martin A, Spence J, Ontl TA, Burnham A, Latimer J. 2017. SPRUCE S1 Bog Fine-root Production and Standing Crop Assessed With Minirhizotrons in the Southern and Northern Ends of the S1 Bog. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.3334/CDIAC/spruce.019

SPRUCE Hollow Elevation Data for Experimental Plots Beginning in 2015

This data set provides hollow elevation data for the 17 SPRUCE experimental plots in the S1 bog on the Marcell Experimental Forest.

Hollows were selected for measurement by walking along each octagonal boardwalk segment in a plot and identifying where a hollow intersected the boardwalk. The vertical distance between the surface of the boardwalk (with a known elevation) and the surface of the hollow was measured and the absolute elevation (in meters amsl) of the hollow surface was calculated.

Citation: 

Griffiths, N.A., and S.D. Sebestyen. 2017. SPRUCE Hollow Elevation Data for Experimental Plots Beginning in 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.035

SPRUCE Ecological Forecasting System

EcoPAD is an interactive Model-Experiment (ModEx) system that assimilates various data streams into models in a rigorous way to constrain model parameters and system states, improve ecological prediction, and quantify associated uncertainty. The system provides feedback to experimenters on which data sets are needed to further improve model predictions and to modelers on which parts of a model need to be improved.

Specifically, the system will  (read more)

Citation: 

 

Check out the demo of Ecological Forecasting at SPRUCE (weekly) on the Ecological Platform for Assimilation of Data web page:  http://ecolab.cybercommons.org/ecopad_portal/#

Forecasting of GPP and ER are automated at weekly timescale. Mean trajectory and confidence interval were derived from 100 stochastic simulations. In each simulation, parameters were randomly chosen from previous (or default) Data Assimilation task. Forcing variables linked to SPRUCE ftp site where updated hourly.

SPRUCE Stability of Peatland Carbon to Rising Temperatures: Supporting Data

These data are provided in support of the SPRUCE publication, Stability of peatland carbon to rising temperatures, Wilson et al., (2016).

Citation: 

Wilson, R.M., A.M. Hopple, M.M. Tfaily, S.D. Sebestyen, C.W. Schadt, L. Pfeifer-Meister, C. Medvedeff, K.J. McFarlane, J.E. Kostka, M. Kolton, R. Kolka, L.A. Kluber, J.K. Keller, T.P. Guilderson, N.A. Griffiths, J.P. Chanton, S.D. Bridgham, and P.J. Hanson. 2016. SPRUCE Stability of Peatland Carbon to Rising Temperatures: Supporting Data. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. http://dx.doi.org/10.3334/CDIAC/spruce.026

SPRUCE Peat Physical and Chemical Characteristics from Experimental Plot Cores, 2012

This data set reports the results of physical and chemical analyses of peat core samples from the SPRUCE experimental study plots located in the S1-Bog.

On August 13-15, 2012, a team of SPRUCE investigators and collaborators collected core samples of peat in the SPRUCE experimental plots. The goal was to characterize the biological, physical, and chemical characteristics of peat, and how those characteristics changed throughout the depth profile of the bog, prior to the initialization of the SPRUCE experimental warming and CO2 treatments.

Citation: 

Iversen, C.M., P.J. Hanson, D.J. Brice, J.R. Phillips, K.J. McFarlane, E.A. Hobbie, R.K. Kolka. 2014. SPRUCE Peat Physical and Chemical Characteristics from Experimental Plot Cores, 2012. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.3334/CDIAC/spruce.005

SPRUCE S1 Bog Porewater, Groundwater, and Stream Chemistry Data: 2011-2013

This data set reports the chemistry of S1 Bog porewater, outlet stream water, and groundwater from upland wells from 2011 through 2013.  These data provide information for studies of the biogeochemical status of the bog and surrounding groundwater aquifer. 

The data have been analyzed and reported on in the following paper: Griffiths, N.A. and S.D. Sebestyen. 2016. Dynamic vertical profiles of peat porewater chemistry in a northern peatland.  Wetlands, 36:1119–1130, DOI 10.1007/s13157-016-0829-5

Citation: 

Griffiths, N. A. and S. D. Sebestyen. 2016. SPRUCE S1 Bog Porewater, Groundwater, and Stream Chemistry Data: 2011-2013. 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.018

SPRUCE Deep Peat Heating (DPH) Peat Water Content and Temperature Profiles for Experimental Plot Cores, June 2014 through June 2015

This data set provides the peat water content and peat temperature at time of sampling for peat cores collected before and during the SPRUCE Deep Peat Heating (DPH) study. Cores were collected during three sampling events: 03 June 2014, 09 September 2014, and 16 June 2015.

Two cores were extracted from hollow locations in each of the 10 experimental plots (4, 6, 8, 10, 11, 13, 16, 17, 19, and 20). Cores were partitioned into samples at 11 depth increments: 0-10, 10-20, 20-30, 30-40, 40-50, 50-75, 75-100, 100-125, 125-150, 150-175, and 175-200 cm below surface of the hollow.

Citation: 

Kluber, Laurel A., Jana R. Phillips, Paul J. Hanson, Christopher W. Schadt. 2016. SPRUCE Deep Peat Heating (DPH) Peat Water Content and Temperature Profiles for Experimental Plot Cores, June 2014 through June 2015. 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.029