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The NCAR Community Climate System Model (CCSM)

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Presentation on theme: "The NCAR Community Climate System Model (CCSM)"— Presentation transcript:

1 The NCAR Community Climate System Model (CCSM)

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4 Community Land Model Biogeophysics Hydrology Catchment Hydrology
Drainage Canopy Water Evaporation Interception Snow Melt Sublimation Throughfall Stemflow Infiltration Surface Runoff Transpiration Precipitation Soil Water Redistribution Latent Heat Flux Sensible Heat Flux Photosynthesis ua Momentum Flux Wind Speed Diffuse Solar Radiation Longwave Radiation Direct Solar Radiation Reflected Solar Radiation Emitted Long- wave Radiation Absorbed Solar Radiation Soil Heat Flux Heat Transfer Ocean Lake Snow Soil Water Ground Water Catchment Hydrology And River Flow Surface Runoff

5 CLM Subgrid Structure Gridcell Landunits Glacier Wetland Vegetated
Lake Urban Columns This is a schematic of the subgrid structure of the land model. There are four distinct heirarchies in the model. There is the gridcell level. A gridcell is divided up into landunits, columns, and plant functional types or pfts. We now have one landunit dedicated to urban. Beneath the vegetated landunit is at least one soil type. Plant functional types then share this soil type and the energy and water budgets associated with this. Soil Type 1 PFTs

6 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 Broadleaf deciduous tree 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) 114 cm 91 cm 55 cm 34 cm 20 cm 12 cm 8 cm 5 cm 3 cm 2 cm Additional data: ½º river network Soil Profile total depth cm 10 layers texture varies with depth

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