| Abstrakt: |
The article presents information on the Community Land Model (CLM) which provides good vector performance on the Earth Simulator in Japan. The CLM is a single-column bio-geophysical model of the land surface. Written in Fortran 90, CLM can be run off-line, coupled to an atmospheric model, or coupled to a climate system model through a flux coupler. When coupled, CLM exchanges fluxes of energy, water, and momentum with the atmosphere. The horizontal land surface heterogeneity in the CLM is represented by a nested subgrid hierarchy composed of gridcells, landunits, columns, and plant functional types (PFTs). Each gridcell can have a different number of landunits, each landunit can have a different number of columns, and each column can have multiple PFTs. Gridcells represent the computational grid which is shared with the atmospheric physics. The landunit, the first subgrid level, is intended to capture the broadest spatial pattern of subgrid heterogeneity. It serves primarily to distinguish physical soil properties. |
