SNF Dataset: Forest Biophysical Parameters (SNF)
Data Center: ORNL DAAC -- The DAAC for Biogeochemical Dynamics
Data Center Contact: Merilyn Gentry   email:  mjg@ornl.gov
                                      phone:  423-376-2655
Source Dataset (SAS):        biophys.ssd01
ASCII Data File:             biophys.dat     File Creation Date: 24SEP1996
ASCII Data Definition File:  biophys.def     File Creation Date: 24SEP1996
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Variable Name  Long Name       SAS Type  Generic Type      Description
1  site_id     SITE_ID         8         NUMBER(4,0)       "Site ID"
2  n_trees     NUM_TREES       8         NUMBER(4,0)       "Number of trees in the plot used in the sample"
3  areasite    SAMPLED_AREA    8         NUMBER(4,0)       "Sampled area in site (m2), usually made up of several plots"
4  dbh_avg     DBH_AVERAGE     8         NUMBER(4,2)       "Average DBH of sampled trees at site (cm)"
5  dbh_sd      DBH_SD          8         NUMBER(4,2)       "Std. dev of DBH at site (cm)"
6  stem_m2     STEM_DENSITY    8         NUMBER(4,3)       "Number of trees per square meter"
7  basal       BASAL_AREA      8         NUMBER(4,2)       "Ratio of bole area to surface area"
8  bmi         BIOMASS_AVERAGE 8         NUMBER(4,3)       "Average biomass index (kg/m2)"
9  bmi_sd      BIOMASS_SD      8         NUMBER(4,3)       "Standard deviation of biomass index (kg/m2)"
10 npp         AVG_NPP         8         NUMBER(4,3)       "Net primary production (kg/m2/year)"
11 lai                         8                           "One-sided leaf area index"
12 lai_sd                      8                           "Standard deviation of LAI"
13 bai         BAI_AVG         8         NUMBER(4,3)       "Bark area index (ratio of the entire surface of boles and branches to the surface area of the site)"
14 bai_sd      BAI_SD          8         NUMBER(4,3)       "Standard deviation of BAI"
15 sub_lai                     8                           "Subcanopy leaf area index"
16 species                     $ 12                        "Plant species"
17 tree_ht     TREE_HEIGHT     8         NUMBER(4,1)       "Average tree height of stand (m)"
18 stndagex    MAX_STAND_AGE   8         NUMBER(3,0)       "Apparent maximum stand age (yrs)"
19 baslarea    BASAL_AREA      8         NUMBER(4,3)       "Basal area of the site, defined as the cross sectional area of trees in cm2/m2 of total sampled area"
20 npp_sd      SD_NPP          8         NUMBER(4,3)       "NPP standard deviation (kg/m2/yr)"
21 laicanav    LAI_CANOPY_AVG  8         NUMBER(4,3)       "Average canopy overstory LAI (ratio of green leaf to surface area of the site)"
22 laicansd    LAI_CANOPY_SD   8         NUMBER(4,3)       "Standard deviation of the average canopy overstory LAI"
23 laisubav    LAI_SUBCAN_AVG  8         NUMBER(4,3)       "Subcanopy LAI average"
24 laisubsd    LAI_SUBCAN_SD   8         NUMBER(4,3)       "Subcanopy LAI stdandard deviation"
