The NCAR Community Climate System Model (CCSM)

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• The NCAR Community Climate System Model (CCSM)

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Community Land Model
Biogeophysics
Sensible Heat Flux
Latent Heat Flux
Photosynthesis
Longwave Radiation
Diffuse Solar Radiation
Direct Solar Radiation
Reflected Solar Radiation
Emitted Long- wave Radiation
Absorbed Solar Radiation
Soil Heat Flux
Heat Transfer
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CLM Subgrid Structure
Gridcell
Landunits
Glacier
Wetland
Lake
Urban
Vegetated
Columns
Soil Type 1
PFTs
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Community Land Model Surface Datasets
Up To 4 Patches

• Each patch has unique
• PFT composition
• PFT abundance
• leaf area
• height
• biomass

glacier 16.7
BDT temperate 25
NET temperate 45
lake 16.7
vegetated 50
C3 grass 15
15 Plant Functional Types Needleleaf evergreen
tree temperate boreal Needleleaf
deciduous tree Broadleaf evergreen tree
tropical temperate Broadleaf deciduous tree
tropical temperate boreal Shrub
broadleaf evergreen, temperate broadleaf
deciduous, temperate broadleaf deciduous,
boreal Grass C3, arctic C3 C4
Crop
wet- land 8.3
urban 8.3
Crop 15

• Additional grid-cell data
• land fraction
• soil color
• soil texture ( sand, clay, mineral
  composition)

• Additional data
• ½º river network

• Soil Profile
• total depth - 343 cm
• 10 layers
• texture varies with depth