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LAND SURFACE MODEL (LSM 1.0) FOR ECOLOGICAL, HYDROLOGICAL, ATMOSPHERIC STUDIES
Entry ID:
model_lsm_1.0
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Summary
Abstract:
The NCAR LSM 1.0 is a land surface model developed to examine biogeophysical
and biogeochemical land-atmosphere interactions, especially the effects of land
surfaces on climate and atmospheric chemistry. It can be run coupled to an
atmospheric model or uncoupled, in a stand-alone mode, if an atmospheric
forcing is provided. The model runs on a spatial grid that can range from one
point to global. The model was designed for coupling to atmospheric numerical
models. Consequently, there is a compromise between computational efficiency
and the complexity with which the necessary atmospheric, ecological, and
hydrologic processes are parameterized. The model is not meant to be a detailed
micrometeorological model, but rather a simplified treatment of surface fluxes
that reproduces at minimal computational cost the essential characteristics of
land-atmosphere interactions important for climate simulations. The model is a
complete executable code with its own time-stepping driver, initialization
(subroutine lsmini), and main calling routine (subroutine lsmdrv). When coupled
to an atmospheric model, the atmospheric model is the time-stepping driver.
There is one call to subroutine lsmini during initialization to initialize all
land points in the domain; there is one call per time step to subroutine lsmdrv
to calculate surface fluxes and update the ecological, hydrological, and
thermal state for all land points in the domain. The model writes its own
restart and history files. These can be turned off if appropriate. Available
for downloading from the ORNL DAAC are the LMS Model Documentation and User's
Guide, the model source code, input data set, and scripts for running the
model. Applications of the model are described in two additional companion
files.
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ISO Topic Category
BIOTA
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
ENVIRONMENT
GEOSCIENTIFIC INFORMATION
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Publications/References
Bonan, G.B. 1994. Comparison of two land surface process models using
prescribed forcings. Journal of Geophysical Research 99:25803-25818.
Bonan, G.B. 1995. Land-atmosphere CO2 exchange simulated by a land surface
process model coupled to an atmospheric general circulation model. Journal of
Geophysical Research 100:2817-2831.
Bonan, G.B. 1995. Sensitivity of a GCM simulation to inclusion of inland water
surfaces. Journal of Climate 8:2691-2704.
Bonan, G.B. 1996. Sensitivity of a GCM simulation to subgrid infiltration and
surface runoff. Climate Dynamics 12:279-285.
Kutzbach, J., Bonan, G., Foley, J., and Harrison, S.P. 1996. Vegetation and
soil feedbacks on the response of the African monsoon to orbital forcing in the
early to middle Holocene. Nature 384:623-626.
Creation and Review Dates
SERF Creation Date:
2005-09-29
SERF Last Revision Date:
2011-05-24
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