BOREAS TE-22 Allometric Forest Survey Data Summary The BOREAS TE-22 team collected data sets in support of its efforts to characterize and interpret information on the forest structure of boreal vegetation in the SSA and NSA during the 1994 growing season. The data are stored in tabular ASCII files. Table of Contents 1 Data Set Overview 2 Investigator(s) 3 Theory of Measurements 4 Equipment 5 Data Acquisition Methods 6 Observations 7 Data Description 8 Data Organization 9 Data Manipulations 10 Errors 11 Notes 12 Application of the Data Set 13 Future Modifications and Plans 14 Software 15 Data Access 16 Output Products and Availability 17 References 18 Glossary of Terms 19 List of Acronyms 20 Document Information 1. Data Set Overview 1.1 Data Set Identification BOREAS TE-22 Allometric Forest Survey Data 1.2 Data Set Introduction Terrestrial Ecology (TE)-22 collected spatial characteristics of boreal forest areas as part of the BOReal Ecosystem-Atmosphere Study (BOREAS) in the Southern Study Area (SSA) and the Northern Study Area (NSA) during the 1994 growing season. 1.3 Objective/Purpose The objective of this research was to gain a better understanding of the impact of spatial heterogeneity on tree physiological processes. 1.4 Summary of Parameters The data files contain parameters that can be divided according to a spatial scale of large to small: 1) Plot 2) Hectare 3) Tree Parameters relating to the entire plot are the location of the mapped plot or study area, stem map area, and the slope of the mapped plot. Parameters on a per hectare basis are tree density per hectare, basal area per hectare, percent of basal area that belongs to a specific species, and biomass per hectare. Parameters on the tree scale are crown height, crown depth, crown diameter, diameter at breast height (DBH), and the crown position of a tree. 1.5 Discussion We are modeling the fixation and allocation of carbon into a heterogeneous forest structure, with the ability to predict climate-driven productivity and biomass into the future. One motivation for the model's development was the prospect of initializing it with only remotely sensed data, allowing projections of productivity and biomass (and ecosystem level correlates of these) to be made across broad spatial scales. A dual-based model was constructed in which a forest plot was represented either as a collection of individual trees or as a spatially explicit canopy. Mechanistic modeling of canopy processes such as photosynthesis and evapotranspiration is performed in the canopy representation. Processes best understood at the level of the individual, such as carbon and nitrogen allocation among plant parts and senescence and mortality, are performed in the individual representation. Conversion between the two representations is performed by using crown allometries. Generally, the individual representation provides parameters for the canopy model, while the canopy model provides results of canopy processes that are used for incrementing the individual model. 1.6 Related Data Sets BOREAS TE-06 Allometry Data BOREAS TE-07 Dendrology Data BOREAS RSS-15 SIR-C and Landsat TM Biomass and Landcover Maps BOREAS TE-20 Stem Map Data BOREAS TE-23 Map Plot Data 2. Investigator(s) 2.1 Investigator(s) Name and Title H.H. Shugart Eric Nielsen 2.2 Title of Investigation Multidisciplinary Integrative Models of Forest Ecosystem Dynamics for the Boreal Forest Biome 2.3 Contact Information Contact 1: H.H. Shugart Dept. of Environmental Sciences University of Virginia Charlottesville, VA (804) 924-7761 (804) 982-2137 (fax) hhs@virginia.edu Contact 2: Eric Nielsen Dept. of Environmental Sciences University of Virginia Charlottesville, VA (804) 979-6380 emn8c@fermi.clas.virginia.edu Contact 3: Andrea Papagno Raytheon ITSS NASA GSFC Greenbelt, MD (301) 286-3134 (301) 286-0239 (fax) andrea.papagno@gsfc.nasa.gov 3. Theory of Measurements One of the focuses of this research is the better understanding of the impact of spatial heterogeneity on tree physiological processes. We wanted to supplement the plot mapping work of TE-20 and TE-23 by sampling auxiliary sites. In addition to increasing the spatial extent of mapped territory, this work also extends plot maps to a wider variety of stand ages and environmental conditions. 4. Equipment 4.1 Sensor/Instrument Description None given. 4.1.1 Collection Environment Standard plot size was 30 m x 30 m, but some low-density and/or heterogeneous sites were 40 m x 40 m (and one, T7T3S, was 20 m x 20 m). 4.1.2 Source/Platform None given. 4.1.3 Source/Platform Mission Objectives None given. 4.1.4 Key Variables The key variables include the location of the mapped plot or study area; stem map area; slope of the mapped plot; tree density per hectare; basal area per hectare; percent of basal area that belongs to a specific species; biomass per hectare; and crown height, crown depth, crown diameter, DBH, and crown position of a sample tree. 4.1.5 Principles of Operation The centers of mapped plots generally correspond with the (0,0) reference point for the hemispherical photos of TE-23. The plots were oriented with respect to true north (using the declinations given in the data set, generally those given in Sellers and Hall, 1996). Standard plot size was 30 m x 30 m, but some low- density and/or heterogeneous sites were 40 m x 40 m (and one, T7T3S, was 20 m x 20 m). The northwest corner of the mapped plot was considered the (0,0) point (therefore, for a standard 30 m x 30 m plot, the hemispherical photo center point is located at (15 m,15 m)). Positions are given as (x,y) pairs where x is the distance east of the plot origin, and y is the distance south. 4.1.6 Sensor/Instrument Measurement Geometry None given. 4.1.7 Manufacturer of Sensor/Instrument None given. 4.2 Calibration None given. 4.2.1 Specifications 4.2.1.1 Tolerance None given. 4.2.2 Frequency of Calibration None given. 4.2.3 Other Calibration Information Not applicable. 5. Data Acquisition Methods To provide information on the homogeneity of the sampled sites (and consequently the 'representativeness' of the mapped plots), a broader scale sampling procedure was also used. Circular plots, labeled G-1 thru G-8, of 100 m2 each (5.64 m radius) were established in a square surrounding the mapped plot (see diagram below). The centers of the sides of this square were located 30 m distant from the center of the stem map (labeled MAP). When combined with the center 100 m2 circle (extracted from the stem map), this yields a regularly spaced 3 x 3 grid of plots (totaling 900 m2, across an area of approximately 3,600 m2). PLOT DIAGRAM G-1 G-2 G-3 (0,0) (n,0) ........... : : G-8 : MAP : G-4 True north up. : : :.........: (0,n) (n,n) G-7 G-6 G-5 Where: G = General Plot Map = Stem Map Notes: General plots 1-8 are 100 m2 circles (5.64 m radius). G-2, G-4, G-6, and G-8 are 30 m N, E, S, and W of the stem map center, respectively. A 5.64 m radius circle is extracted from the center of the stem map to form G-9 (this sample is included in the general plot data summary, but individual tree data are not relisted; i.e., they can be found in the stem map data). For the stem maps, data were collected for each tree (>= 5 DBH, except for some unproductive sites where 4 cm was used as a cutoff instead), and sapling (tree species < 5 cm DBH but > 1 m high), shrub (nontree woody species > 1 m high), ground cover, and some soils information was collected as well. The following information were collected for trees: 1) (x,y) coordinates. Measured to the nearest 25 cm. Absolute locations should not be considered correct to better than +/- 1 m because of inaccuracies in the sampling method. Most locations should be correct to within +/- 50 cm, however. 2) Species. 3) DBH. Measured to the nearest 0.1 cm. 4) Crown position, using the following categories: Dominant: Emergent from canopy, > 90 % of crown exposed from all sides Codominant: > 50 % of crown exposed on all sides, or fully exposed on at least one side of crown (180 degrees) Partial codominant: > 50 % of crown exposed on one side of crown Intermediate: At least some exposure of crown from sides Gap: Angle between the vertical and the tops of surrounding crowns > 45 degrees Vertical: Previous angle < 45 degrees (i.e., direct light must penetrate nearly straight down to reach crown) Suppressed: No direct exposure even from directly above Dead: Dead but still rooted (not sampled in all plots) These definitions were adopted to characterize the radiation environment experienced by each tree more precisely. By matching data collected using these categories with data collected by TE-20 using the standard (dominant, codominant, intermediate, suppressed) categories, the following translations were generated: TE-22 Classification -> Standard Classification Dominant, Codominant -> Dominant Partial codominant ---> Codominant Intermediate, Gap ----> Intermediate Vertical, Suppressed -> Suppressed 5) Mean height, mean crown depth, and mean crown diameter. Measured for a sampling (usually 10-20 trees per stem map, depending on canopy heterogeneity) of canopy and near-canopy trees. Crown spread measured across two perpendicular diameters. Shrub and sapling data were collected in four 30 m x 1 m belt transects across the stem map. The number of individuals of each species meeting the definitions above were counted. In those plots, for which dead trees were not included in the stem map, the number of dead trees of each species in these belts was also noted. A count was also made of the number of down tree boles crossing each of these belts (old boles judged to be remaining from previous stands were not included in this count). Ground cover sampling was performed in the center 1 m square of each 10 m x 10 m segment. The percentage cover of feather mosses, sphagnum, moss lichens, forbs, fungi, leaf litter, rocks, and organic and mineral soil was estimated for each subplot. If moss, lichen, or leaf litter constituted a significant fraction of the cover, its depth was noted (including partially decayed material, but not humus). The number of seedlings (< 1 m high) of each tree species in the subplot was recorded. In three of the ground cover subplots (generally in the northwest, central, and southeast 10 m x 10 m segments), the depth to mineral soil was measured, and the organic and mineral soils described. Canopy closure was also estimated in these locations using a spherical densiometer. Degree of slope, aspect, and slope position were determined for each mapped plot. Data Collected - General Sampling Sampling of the 'general plots' used for broader-scale site characterization. Ground cover percentages and depths were estimated over the entire plot area rather than within a smaller subplot. Some heights were measured unless they appeared identical to those in the mapped plot. 6. Observations 6.1 Data Notes The data set contains the list of sites sampled with variables describing the sampling procedure at each. Stem maps were not produced for several of the sites, either because TE-23 planned to produce them (e.g., W0Y5A, MTOW - the mixed aspen-spruce TE tower site in the SSA), or because of time constraints (e.g., G9I4S, at which a ninth circular plot was established at the site center). The exact location sampled deserves mention in a couple of cases. D9I1A* is not located at the actual auxiliary site because we could not find it. It is within several hundred meters of the site, however, in a pretty homogeneous forest. G4I3M is the first Forestry Canada point reached from the tie-in, and is the site used by TE-23 for photos. G4I3M2 is Forestry Canada point 2, and was heloflagged at the time we were there (25-Jul-1994). Information on age and productivity will be revised when data from tree cores are obtained. Also see Section 10.2.5. 6.2 Field Notes None given. 7. Data Description 7.1 Spatial Characteristics None given. 7.1.1 Spatial Coverage Site List and Descriptions Site ID Study Area Dominant Species Age Productivity D9G4A SSA Quaking Aspen mature average D9I1A SSA Quaking Aspen intermediate average F5I6P SSA Jack Pine intermediate average F7J0P SSA Black Spruce/Jack Pine mature high /White Spruce G4I3M SSA Quaking Aspen/White Spruce mature high /Balsam Fir G4I3M2 SSA Balsam Fir/White Spruce mature high /Quaking Aspen G4K8P SSA Jack Pine mature low G6K8S SSA Black Spruce/Tamarack intermediate average G9I4S SSA Black Spruce mature low G9L0P SSA Jack Pine mature high MTOW SSA Quaking Aspen/Black Spruce intermediate average 99O9P TRANSECT Jack Pine/Black Spruce intermediate low (rock) P7V1A NSA Quaking Aspen mature high Q3V3P NSA Jack Pine/Quaking Aspen mature high S9P3A NSA Quaking Aspen/P.Birch intermediate average T0P5M NSA Black Spruce/Quaking Aspen mature high T0P8S NSA Black Spruce mature high T4U9S NSA Black Spruce/Tamarack intermediate average T7T3S NSA Black Spruce mature low (muskeg) T8Q9P NSA Jack Pine intermediate high W0Y5A NSA Quaking Aspen intermediate low The NSA measurement sites and associated North American Datum of 1983 (NAD83) coordinates are: NSA-9BS, site id T4U9S, Lat/Long: 55.83455°N, 97.98364°W, Universal Transverse Mercator (UTM) Zone 14, N: 6,188,132.8, E: 563,657.5. NSA-9BS, site id T0P8S, Lat/Long: 55.88351°N, 98.80225°W, UTM Zone 14, N: 6,193,132.0, E: 512,370.1. NSA-9BS, site id T7T3S, Lat/Long: 55.89358°N, 98.22621°W, UTM Zone 14, N: 6,194,505.6, E: 548,391.8. NSA-9JP, site id Q3V3P, Lat/Long: 55.55712°N, 98.02473°W, UTM Zone 14, N: 6,157,222.2, E: 561,517.9. NSA-9JP, site id T8Q9P, Lat/Long: 55.93219°N, 98.6105°W, UTM Zone 14, N: 6,198,601.4, E: 524,334.5. NSA-9JP, site id 99O9P, Lat/Long: 55.88173°N, 99.03952°W, UTM Zone 14, N: 6,192,917.5, E: 497,527.8. NSA-ASP, site id P7V1A, Lat/Long: 55.50253°N, 98.07478°W, UTM Zone 14, N: 6,151,103.7, E: 558,442.1. NSA-ASP, site id S9P3A, Lat/Long: 55.88576°N, 98.87621°W, UTM Zone 14, N: 6,193,371.6, E: 507,743.3. NSA-ASP, site id W0Y5A, Lat/Long: 56.00339°N, 97.3355°W, UTM Zone 14, N: 6,207,706.6, E: 603,796.6. NSA-MIX, site id T0P5M, Lat/Long: 55.88911°N, 98.85662°W, UTM Zone 14, N: 6,193,747.3, E: 508,967.7. The SSA measurement sites and associated NAD83 coordinates are: SSA-9BS, site id G6K8S, Lat/Long: 53.94446°N, 104.759°W, UTM Zone 13, N: 5,977,146.9, E: 515,847.9. SSA-9BS, site id G9I4S, Lat/Long: 53.99877°N, 105.11805°W, UTM Zone 13, N: 5,983,169.1, E: 492,291.2. SSA-9JP, site id F5I6P, Lat/Long: 53.86608°N, 105.11175°W, UTM Zone 13, N: 5,968,627.1, E: 492,651.3. SSA-9JP, site id G9L0P, Lat/Long: 53.97576°N, 104.73779°W, UTM Zone 13, N: 5,980,856.0, E: 517,197.7. SSA-9JP, site id F7J0P, Lat/Long: 53.88336°N, 105.05115°W, UTM Zone 13, N: 5,970,323.3, E: 496,667.0. SSA-9JP, site id G4K8P, Lat/Long: 53.91883°N, 104.76401°W, UTM Zone 13, N: 5,974,516.6, E: 515,499.1. SSA-ASP, within 30 meters of site id D9I1A, UTM Zone 13, N: 5,952,900 , E: 486,300. SSA-ASP, site id D9G4A, Lat/Long: 53.74019°N, 105.46929°W, UTM Zone 13, N: 5,954,718.4, E: 469,047.1. SSA-MIX, site id D9I1M, Lat/Long: 53.7254°N, 105.20643°W, UTM Zone 13, N: 5,952,989.7, E: 486,379.7. SSA-MIX, site id G4I3M, Lat/Long: 53.9375°N, 105.14246°W, UTM Zone 13, N: 5,976,354.9, E: 490,677.3. 7.1.2 Spatial Coverage Map Not available. 7.1.3 Spatial Resolution The data are point measurements at the given locations. 7.1.4 Projection Not applicable. 7.1.5 Grid Description Not applicable. 7.2 Temporal Characteristics 7.2.1 Temporal Coverage Measurements were made during the growing season of 1994. 7.2.2 Temporal Coverage Map None given. 7.2.3 Temporal Resolution None given. 7.3 Data Characteristics Data characteristics are defined in the companion data definition file (te22allm.def). 7.4 Sample Data Record Sample data format shown in the companion data definition file (te22allm.def). 8. Data Organization 8.1 Data Granularity All of the Allometric Forest Survey Data are contained in one dataset. 8.2 Data Format(s) The data files numerical and character fields of varying length separated by commas. The character fields are enclosed with single apostrophe marks. There are no spaces between the fields. Sample data records are shown in the companion data definition file (te22allm.def). 9. Data Manipulations 9.1 Formulae None given. 9.1.1 Derivation Techniques and Algorithms None given. 9.2 Data Processing Sequence None given. 9.2.1 Processing Steps None given. 9.2.2 Processing Changes None given. 9.3 Calculations 9.3.1 Special Corrections/Adjustments None given. 9.3.2 Calculated Variables None given. 9.4 Graphs and Plots None given. 10. Errors 10.1 Sources of Error None given. 10.2 Quality Assessment 10.2.1 Data Validation by Source None given. 10.2.2 Confidence Level/Accuracy Judgment None given. 10.2.3 Measurement Error for Parameters None given. 10.2.4 Additional Quality Assessments None given. 10.2.5 Data Verification by Data Center Data were examined for general consistency and clarity. The Tree Stem Map Data submitted by TE-22 personnel had 17 rows of data removed from the extracted data files due to invalid data in the dominance_class column. The rows which were removed are below. SITE_NAME,SUB_SITE,MEASUREMENT_YEAR,PLOT_ID,SPECIES,X_GRID_COORD,Y_GRID_COORD,GE NERAL_SUBPLOT_ID,TREE_DIAMETER_BREAST_HT,DOMINANCE_CLASS,CRTFCN_CODE,REVISION_DA TE 'NSA-9BS-AUX07','9TE22-MAP01',1994,'GENERAL','Picea mariana',,,'5',23.4,'8','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',8.1,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',14.0,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',13.8,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',14.7,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',7.9,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',14.9,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',8.8,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',17.9,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',12.5,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',16.5,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',10.4,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',17.1,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',9.7,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',11.3,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',16.3,'?','CPI',24-FEB-99 'SSA-ASP-AUX08','9TE22-MAP01',1994,'GENERAL','Populus tremuloides',,,'5',17.2,'?','CPI',24-FEB-99 11. Notes 11.1 Limitations of the Data None given. 11.2 Known Problems with the Data None given. 11.3 Usage Guidance None given. 11.4 Other Relevant Information Thanks to Carolyn Dowling and David Lawrence at UVA. for field assistance and to Jason for help in site location. 12. Application of the Data Set This data set can be used to study the spatial characteristics of the boreal forest. 13. Future Modifications and Plans None given. 14. Software 14.1 Software Description None given. 14.2 Software Access None given. 15. Data Access 15.1 Contact for Data Center/Data Access Information These BOREAS data are available from the Earth Observing System Data and Information System (EOS-DIS) Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC). The BOREAS contact at ORNL is: ORNL DAAC User Services Oak Ridge National Laboratory (865) 241-3952 ornldaac@ornl.gov ornl@eos.nasa.gov 15.2 Procedures for Obtaining Data BOREAS data may be obtained through the ORNL DAAC World Wide Web site at http://www-eosdis.ornl.gov/ or users may place requests for data by telephone, electronic mail, or fax. 15.3 Output Products and Availability Requested data can be provided electronically on the ORNL DAAC's anonymous FTP site or on various media including, CD-ROMs, 8-MM tapes, or diskettes. The complete set of BOREAS data CD-ROMs, entitled "Collected Data of the Boreal Ecosystem-Atmosphere Study", edited by Newcomer, J., et al., NASA, 1999, are also available. 16. Output Products and Availability 16.1 Tape Products None. 16.2 Film Products None. 16.3 Other Products These data are available on the BOREAS CD-ROM series. 17. References 17.1 Platform/Sensor/Instrument/Data Processing Documentation None. 17.2 Journal Articles and Study Reports Sellers, P. and F. Hall. 1994. Boreal Ecosystem-Atmosphere Study: Experiment Plan. Version 1994-3.0, NASA BOREAS Report (EXPLAN 94). Sellers, P. and F. Hall. 1996. Boreal Ecosystem-Atmosphere Study: Experiment Plan. Version 1996-2.0, NASA BOREAS Report (EXPLAN 96). Sellers, P., F. Hall, and K.F. Huemmrich. 1996. Boreal Ecosystem-Atmosphere Study: 1994 Operations. NASA BOREAS Report (OPSDOC 94). Sellers, P., F. Hall, and K.F. Huemmrich. 1997. Boreal Ecosystem-Atmosphere Study: 1996 Operations. NASA BOREAS Report (OPSDOC 96). Sellers, P.J., F. Hall, H. Margolis, B. Kelly, D. Baldocchi, G. den Hartog, J. Cihlar, M.G. Ryan, B. Goodison, P. Crill, K.J. Ranson, D. Lettenmaier, and D.E. Wickland. 1995. The Boreal Ecosystem-Atmosphere Study (BOREAS): An overview and early results from the 1994 field year. Bull. Am. Meteorol. Soc. 76:1549-1577. Sellers, P.J., F.G. Hall, R.D. Kelly, A. Black, D. Baldocchi, J. Berry, M. Ryan, K.J. Ranson, P.M. Crill, D.P. Lettenmaier, H. Margolis, J. Cihlar, J. Newcomer, D. Fitzjarrald, P.G. Jarvis, S.T. Gower, D. Halliwell, D. Williams, B. Goodison, D.E. Wickland, and F.E. Guertin. 1997. BOREAS in 1997: Experiment overview, scientific results, and future directions. Journal of Geophysical Research, 102 (D24): 28,731-28,769. Singh, T. 1986. Generalizing biomass equations for the boreal forest region of west-central Canada. Forest Ecology and Management 17: 97-107. 17.3 Archive/DBMS Usage Documentation None. 18. Glossary of Terms Basal Area - The area of the base of the tree. Origin - Defined as (0,0), the northwest corner of the plot. Stem Map - The position of a tree in a plot based on the coordinate system (X,Y) of the plot. X - The distance east of the plot origin. Y - The distance south of the plot origin. 19. List of Acronyms ASCII - American Standard Code for Information Interchange BOREAS - BOReal Ecosystem-Atmosphere Study BORIS - BOREAS Information System CD-ROM - Compact Disk-Read-Only Memory DAAC - Distributed Active Archive Center DBH - Diameter at Breast Height DOY - Julian Day of Year EOS - Earth Observing System EOSDIS - EOS Data and Information System GMT - Greenwich Mean Time GSFC - Goddard Space Flight Center HTML - HyperText Markup Language IFC - Intensive Field Campaign MIX - Mixed Wood NAD83 - North American Datum of 1983 NASA - National Aeronautics and Space Administration NOAA - National Oceanic and Atmospheric Administration NSA - Northern Study Area OA - Old Aspen OBS - Old Black Spruce OJP - Old Jack Pine ORNL - Oak Ridge National Laboratory PANP - Prince Albert National Park RSS - Remote Sensing Science SIR-C - Shuttle Imaging Radar-C SSA - Southern Study Area TE - Terrestrial Ecology TF - Tower Flux TM - Thematic Mapper URL - Uniform Resource Locator UTM - Universal Transverse Mercator YJP - Young Jack Pine 20. Document Information 20.1 Document Revision Date Written: 11-Mar-1996 Last Updated: 04-May-1999 20.2 Document Review Date(s) BORIS Review: 30-Oct-1998 Science Review: 12-Dec-1998 20.3 Document ID 20.4 Citation H.H. Shugart and Eric Nielsen, both of the Dept. of Environmental Sciences, University of Virginia 20.5 Document Curator 20.6 Document URL Keywords Basal Area Biomass Diameter at Breast Height Heterogeneity Stem Map TE22_Tree_Survey.doc 06/09/99