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Olson's Major World Ecosystems Ranked by Carbon in Live Vegetation: An Updated Database Using the GLC2000 Land Cover Product

Table 1. Files in this numeric data package

File No. File name File size (bytes) File description
1 ndp017b.txt 15534 k Descriptive text file
2 max_c.e00.gz 1642992 k Maxiumum biomass carbon estimates in compressed ARC/INFO export file
3 max_c.img.gz 675396 k Maxiumum biomass carbon estimates in compressed ERDAS IMAGINE file
4 max_c.tif.gz 664179 k Maxiumum biomass carbon estimates in compressed TIFF file
5 med_c.e00.gz 1653103 k Mean biomass carbon estimates in compressed ARC/INFO export file
6 med_c.img.gz 681797 k Mean biomass carbon estimates in compressed ERDAS IMAGINE file
7 med_c.tif.gz 671245 k Mean biomass carbon estimates in compressed TIFF file
8 glc2000s5m.e00.gz 2197615 k GLC2000 land cover classification in compressed ARC/INFO export file
9 glc2000b.e00.gz 2246551 k Revised GLC2000 land cover classification in compressed ARC/INFO export file
10 eco_worldc.e00.gz 18623823 k FAO Ecological Zone data in compressed ARC/INFO export file
11 eco_grid.e00.gz 594298 k Gridded FAO Ecological Zone data in compressed ARC/INFO export file
12 glceco.e00.gz 2299727 k Combined GLC2000 land cover data and FAO Ecological Zone data in compressed ARC/INFO export file
13 updated_olson_max.jpg 146526 k Graphic map showing global maximum biomass C estimates
14 updated_olson_med.jpg 146357 Graphic map showing global mean biomass C estimates
15 olson_carbon_gibbs02107.xls 22016 k Microsoft Excel spreadsheet containing crosswalk between GLC2000 land cover classes and Olson ecosystem types

Table 2. Variable formats for max_c.vat in max_c.e00.gz

Start Col Item Name Data Width Display Width Data Type* Definition and comments
1 VALUE 4 10 B Maximum estimates of biomass carbon (metric tons C)
5 COUNT 4 10 B Number of gridcells assigned to value

*Data types are B-binary, C-character, F-float, I-integer, and N-numeric. F and N data types are real numbers with different precisions (precision is system dependent).

Table 3. Variable formats for med_c.vat in med_c.e00.gz

Start Col Item Name Data Width Display Width Data Type* Definition and comments
1 VALUE 4 10 B Mean estimates of biomass carbon (metric tons C)
5 COUNT 4 10 B Number of gridcells assigned to value

*Data types are B-binary, C-character, F-float, I-integer, and N-numeric. F and N data types are real numbers with different precisions (precision is system dependent).

Table 4. Crosswalk between GLC2000 land-cover classification and the Olson classification

Class No. GLC2000 Land cover class FAO Ecological Zone Olson ecosystem category Revised Medium Carbon Values* (metric tons C/ha) Revised Maximum Carbon Values* (metric tons C/ha)
1 Tree Cover, Broadleaved Evergreen Temperate Temperate Broad-leaved Forest 90 140
1 Tree Cover, Broadleaved Evergreen Tropical Tropical Broad-leaved Forest 120 250
2 Tree Cover, Broadleaved Deciduous, Closed Boreal Taiga 70 125
2 Tree Cover, Broadleaved Deciduous, Closed Temperate Temperate Broad-leaved Forest 90 140
2 Tree Cover, Broadleaved Deciduous, Closed Tropical Tropical Broad-leaved Forest 120 250
3 Tree Cover, Broadleaved Deciduous, Open Boreal Taiga 70 125
3 Tree Cover, Broadleaved Deciduous, Open Temperate Temperate Broad-leaved Forest 90 140
3 Tree Cover, Broadleaved Deciduous, Open Tropical Tropical Dry Forest 60 90
4 Tree Cover, Needleleaved Evergreen Boreal Taiga 70 125
4 Tree Cover, Needleleaved Evergreen Temperate Other Conifer 130 200
4 Tree Cover, Needleleaved Evergreen Tropical Tropical Broad-Leaved Forest 120 250
5 Tree Cover, Needleleaved Deciduous Boreal Taiga 70 125
5 Tree Cover, Needleleaved Deciduous Temperate Other Conifer 130 200
5 Tree Cover, Needleleaved Deciduous Tropical Tropical Broad-Leaved Forest 120 250
6 Tree Cover, Mixed-leaf type Boreal Taiga 70 125
6 Tree Cover, Mixed-leaf type Temperate Mixed Woods 70 140
6 Tree Cover, Mixed-leaf type Tropical Tropical Broad-Leaved Forest 120 250
7 Tree Cover, regularly flooded, fresh and brackish water Boreal Taiga 70 125
7 Tree Cover, regularly flooded, fresh and brackish water Temperate Temperate Broad-leaved Forest 90 140
7 Tree Cover, regularly flooded, fresh and brackish water Tropical Tropical Broad-Leaved Forest 120 250
8 Tree Cover, regularly flooded, saline water Boreal Taiga 70 125
8 Tree Cover, regularly flooded, saline water Temperate Temperate Broad-leaved Forest 90 140
8 Tree Cover, regularly flooded, saline water Tropical Tropical Broad-Leaved Forest 120 250
9 Mosaic: Tree cover/other natural vegetation Boreal, Temperate, and Tropical Fields/Woods Mosaics 30 50
10 Tree cover, burnt Boreal, Temperate, and Tropical Secondary Forest/Field Mosaics 40 80
11 Shrub cover, closed-open, evergreen Boreal, Temperate and Tropical Grassland or Shrubland complex 9 30
12 Shrub cover, closed-open, deciduous Boreal, Temperate and Tropical Grassland or Shrubland complex 9 30
13 Herbaceous cover, closed-open, Boreal, Temperate and Tropical Grassland or Shrubland complex 9 30
14 Sparse Herbaceous or sparse shrub cover Boreal, Temperate and Tropical Grassland or Shrubland complex 9 30
15 Regularly flooded shrub and/or herbaceous cover Boreal, Temperate and Tropical Grassland or Shrubland complex 9 30
16 Cultivated and managed areas Boreal, Temperate and Tropical Non-irrigated croplands 8 20
17 Mosaic: Cropland/Tree cover Boreal, Temperate and Tropical Secondary Forest/field mosaics 40 80
18 Mosaic: Cropland/Shrub or Grass cover Boreal, Temperate and Tropical Field/woods mosaics 30 50
19,21,22 Bare, Snow and Ice, and Artificial Surfaces Boreal, Temperate and Tropical   0 0
NOTE: C values for Olson's "main taiga" and "southern taiga" were averaged because there was no clear way to distinguish between the categories in the GLC2000.


Please cite as: Olson's Major World Ecosystems Ranked by Carbon in Live Vegetation: An Updated Database Using the GLC2000 Land Cover Product, NDP-017b. Available at [http://cdiac.ornl.gov/epubs/ndp/ndp017/ndp017b.html] from the Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee, U.S.A.