[Parameters: Topic='LAND SURFACE', Term='LAND USE/LAND COVER', Variable_Level_1='LAND COVER']
SNF FOREST COVER BY SPECIES/STRATAEntry ID: SNF_SITECOMP
Abstract: The purpose of the SNF study was to improve our understanding of the relationship between remotely sensed observations and important biophysical parameters in the boreal forest. A key element of the experiment was the development of methodologies to measure forest stand characteristics to determine values of importance to both remote sensing and ecology. Parameters studied were biomass, leaf area ... index, above ground net primary productivity, bark area index and ground coverage by vegetation. Thirty two quaking aspen and thirty one black spruce sites were studied. Use of multiple plots within each site allowed estimation of the importance of spatial variation in stand parameters. Within each plot, all woody stems greater than two meters in height were recorded by species and relevant dimensions were measured. Diameter breast height (dbh) was measured directly. Height of the tree and height of the first live branch were determined by triangulation. The difference between these two heights was used as the depth of crown. Similar measurements were made for shrubs between one and two meters tall in the aspen sites. The Forest Canopy Composition (SNF) data set provides the counts of canopy (over two meters tall) tree species and subcanopy (between one and two meters tall) tree species. Also related, for the aspen sites, in each plot a visual estimation of the percent coverage of the canopy, subcanopy and understory vegetation was made. The site averages of these coverage estimates are presented in the Aspen Forest Cover by Stratum/Plot (SNF) data set.
Data Set Citation
Dataset Originator/Creator: GOETZ, S.J.HALL, F.G.HUEMMRICH, K.F.NICKESON, J.E.STREBEL, D.E.WOODS, K.D.
Dataset Title: SNF FOREST COVER BY SPECIES/STRATA
Dataset Release Date: 1996
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/179Online Resource: http://mercury.ornl.gov/ornldaac/send/query?term2=179&term2attribut...
Start Date: 1976-01-01Stop Date: 1986-12-31
Data Set Progress
Role: TECHNICAL CONTACT
Phone: (301) 405-1297
Fax: (301) 314-9299
Email: sgoetz at geog.umd.edu
University of Maryland Dept of Geography LeFrak Bldg
City: College Park
Province or State: MD
Postal Code: 20742
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: 1996-10-24
Last DIF Revision Date: 2012-10-24