[Parameters: Topic='LAND SURFACE', Term='SOILS', Variable_Level_1='ORGANIC MATTER']
GLOBAL ORGANIC SOIL CARBON AND NITROGEN (ZINKE ET AL.)Entry ID: CDIAC_NDP18
Abstract: This package contains worldwide soil carbon and nitrogen data for more than 3,500 soil profiles. The database was begun about 40 years ago with the collection and analyses by Zinke of soil samples from California. Additional data came from soil surveys of California, Italy and Greece, Iran, Thailand, Vietnam, various tropical Amazonian areas, U.S. forest soils,and from the soil survey literature. ... The main samples for laboratory analyses were collected at uniform soil depth increments and included bulk density determinations, but samples reported in the literature did not always have this uniformity. For the latter group of samples, only profiles that were samples to a meter depth or to actual depth were used; if bulk densities were not reported, then estimates were made from regressions based on organic carbon content of the soil samples associated with the profile. Methods used for analytical carbon determinations were dry combustion, 'wet combustion', or loss on ignition with adjustments made to the values obtained with the last two methods. Nitrogen was determined by the Kjeldahl method on the soil fine earth fraction and reported as total organic nitrogen. The data can be used to estimate the size of the soil's organic carbon and nitrogen pools at equilibrium with natural soil-forming factors. Most of the data are from profiles associated with natural vegetation so they constitute a baseline for evaluation of the effects that disturbance or modification to natural vegetation has on soil carbon equilibrium at either a global or regional scale. The data can also be used for understanding the range and viability of soil carbon and nitrogen pools for specific ecosystems or climatic regimes.
Data Set Citation
Dataset Originator/Creator: EMANUEL, W.R.OLSON, J.S.POST, W.M.STANGENBERGER, A.G.ZINKE, P.J.
Dataset Title: GLOBAL ORGANIC SOIL CARBON AND NITROGEN (ZINKE ET AL.)
Dataset Release Date: 1998
Dataset Release Place: Oak Ridge, Tennessee, U.S.A.
Dataset Publisher: Oak Ridge National Laboratory Distributed Active Archive Center
Data Presentation Form: Online Files
Dataset DOI: doi:10.3334/ORNLDAAC/221Online Resource: http://mercury.ornl.gov/ornldaac/send/query?term2=221&term2attribut...
Start Date: 1940-01-01Stop Date: 1986-12-31
ISO Topic Category
Data Set Progress
Role: TECHNICAL CONTACT
Environmental Sciences Division Oak Ridge National Laboratory
City: Oak Ridge
Province or State: Tennessee
Postal Code: 37831
Role: DIF AUTHOR
Phone: (865) 574-7447
Email: uso at daac.ornl.gov
ORNL DAAC User Services Office Oak Ridge National Laboratory
City: Oak Ridge
Province or State: TN
Postal Code: 37831-6407
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 1998-11-10
Last DIF Revision Date: 2013-11-21