The Climatological Data Land Model (dlnd) functions as the land component in a
CCSM configuration. The dlnd land component interacts with the coupler just
like any land model would, but it is not an active model, rather, it takes land
data from an input data file and sends it to the coupler, ignoring any forcing
data received from the coupler. Typically the input data file contains mean
monthly ... data generated by an active CCSM land model (it's unlikely that real
world observations exist for all the required fields). Such a "dummy" land
model is useful for doing ocean + ice spinup runs.
The CCSM Climatological Data Land Model, version 6.0 (dlnd), was released in
June 2004, as part of the CCSM3.0 release.
CCSM coupled model is based on a framework which divides the complete climate
system into component models connected by a coupler. This design requires four
component models -- atmosphere, sea-ice, land, and ocean -- each connected to
the Coupler, and each exchanging data with the Coupler only.