Chris Anderson, Ray Arritt, Bill Gutowski, Gene Takle

Iowa State University

**Contact information of investigator(s): **

candersn@iastate.edu

**Model grid type: **

Lambert Conic Conformal

standard latitude 1 = 60

standard latitude 2 = 30

standard longitude = -100

cone factor = 0.7155668

**Horizontal grid spacing (or equivalent node spacing for spectral models): **

52 km, centered on 35, -100

85 n-s and 101 e-w grid points

**Model vertical coordinate and number of vertical levels: **

sigma, 23 levels

**Model dynnamics: **

nonhydrostatic, compressible

**Lateral boundary relaxation method and number of points in buffer zone: **

Linear nudging of boundary data toward internal solution over 4 grid points

**Number of soil layers for which soil temperature is computed: **

4 layers (Noah LSM)

**Number of soil layers for which soil water content is computed: **

4 layers (Noah LSM)

**Number of surface vegetation types: **

16 land surface classes from US Geological Survey SiB model

**Formulation for boundary-layer fluxes (e.g., local K-theory based upon gradient Richardson number): **

Hong-Pan (MRF) PBL, using Troen-Mahrt representation of countergradient
term and nonlocal K profile

**Representation of explicit precipitation (e.g., rain and ice physics): **

Dudhia scheme, simple ice physics

snow and ice clouds only permitted below 0C; liquid clouds only permitted above 0C

snow only permitted below 0C; rain only premitted above 0C

**Prognostic variables for explicit precipitation (e.g., cloud water; rain water; number of ice species): **

cloud water, rain water

**Formulation for convective parameterization (e.g., Kuo-type): **

Kain-Fritsch, no shallow convection

**Reference(s) containing model description: **

Grell, J. Dudhia, and D. R. Stauffer, 1993: A description of the
fifth-generation Penn State/NCAR mesoscale model (MM5). NCAR Tech.
Note NCAR/TN-397+STR. National Center for Atmospheric Research,
Boulder, CO, 200 pp.

Dudhia, J., and J. F. Bresch, 2002: A global version of the PSU-NCAR mesoscale
model. *Mon. Wea. Rev.*, **130**, 2989-3007.

Online description

**Reference(s) describing land-surface parameterization: **

Chen, F., and J. Dudhia, 2001: Coupling an advanced land-surface/hydrology
model with the Penn State/NCAR MM5 modeling system. Part I: Model
implementation and sensitivity. *Mon. Wea. Rev.*, **129**, 569-585.

Chen, F., and J. Dudhia, 2001: Coupling an advanced land-surface/hydrology
model with the Penn State/NCAR MM5 modeling system. Part I: Preliminary
model validation. *Mon. Wea. Rev.*, **129**, 587-604.

**Reference(s) describing convective parameterization: **

Kain, J. S., and J. M. Fritsch, 1990: A one-dimensional entraining/detraining
plume model and its application in convective parameterization. * J. Atmos.
Sci.*, **47**, 2784-2802.

**Reference(s) describing boundary-layer parameterization: **

Hong, S.-Y., and H. L. Pan, 1996: Nonlocal boundary layer vertical diffusions
in a medium-range forecast model. *Mon. Wea. Rev.*, **124**, 2322-2339.

**Reference(s) describing explicit precipitation paramerization: **

Dudhia, J., 1989: Numerical study of convection observed during the Winter Monsoon Experiment
using a mesoscale two-dimensional model. * J. Atmos. Sci.*, **46**, 3077-3107.