Soil Erosion Network: Model Metadata
DEAD - Wind Erosion

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1 Model identification Soil Erosion Network - Model
1.1 Model name Dust Entrainment and Deposition (DEAD) Model
1.2 Most recent version 1.3.2
1.3 Date of release January 2003
2 Wind Erosion
3 Contact person
3.1 Name Dr Charles Zender
3.2 Address

Department of Earth System Science
University of California at Irvine

Irvine, CA 92697-3100

3.3 Tel +1 (949) 824-2987
3.4 Fax +1 (949) 856-9787
3.5 Email
4 Model Author(s) Drs Charlie Zender, Phil Rasch, Natalie Mahowald, Gordon Bonan
5 Model components
5.1 Water erosion: -
5.2 Wind erosion: Based on saltation-sandblasting theory
5.3 Hydrology: Depends on host model; usually LSM/CLM Bonan (1996)
5.4 Site/topography: Global, GTOPO30 topography
5.5 Plant growth:

Depends on host model; usually 4 patches per gridcell, with prescribed annual cycle derived from NDVI

5.6 Management: -
5.7 Soil: Depends on host model, usually 6-10 levels
5.8 Chemistry: Depends on host model
5.9 Weather: Depends on host model: usually 3-6 hourly global NCEP of ECMWF analyses, or interactive 20-40 minute GCM predictions
6 Model characteristics
6.1 Spatial
6.1.1 Class of area: Global, usually 1-4 degree lat/lon resolution
6.1.2 Flow routing system: Depends on host model; usually no flow routing, or RTM routing of Famiglietti
6.1.3 Minimum area: One square meter. The dust model runs in a box-model mode, as well as in global model mode
6.1.4 Maximum area: Global
6.2. Temporal Simulates 10 minutes - many centuries
6.2.1 Timestep: Depends on host model, usually 10-60 minutes
6.2.2 Single or multiple event? Multiple
6.2.3 Maximum simulation duration: 1000 years
7 Model's representation of processes
7.1 Water erosion processes
7.1.1 Interrill: -
7.1.2 Rill: -
7.1.3 Gully: -
7.1.4 Streambank: -
7.1.5 Deposition: -
7.2 Wind erosion processes: Sandblasting (Alfaro and Gomes, 2001), Threshold frictions (Iversen and White, 1981)
7.2.1 Creep/surface roll:  
7.2.2 Saltation: Yes (White, 1979)
7.2.3 Suspension  
7.3 Hydrological processes: Critical gravimetric water content for soil moisture inhibition of erosion (Fecan et al)
7.3.1 Evaporation/transpiration: Energy balance turbulent fluxes (Bonan, 1996)
7.3.2 Runoff: Depends on host model
7.3.3 Infiltration Depends on host model
7.3.4 Subsurface flow: Depends on host model
7.3.5 Return flow Depends on host model
7.4 Plant processes:
7.4.1 Light interception and photsynthesis: Depends on host model
7.4.2 Dry matter and residue Depends on host model
7.4.3 Root growth: Depends on host model
7.4.4 Pests: None
7.4.5 CO2 sensitivity: Depends on host model
7.5 Soil: Texture distribution from IGBP-DIS, 6-10 layers
7.5.1 Crust development None
7.5.2 Aggregate properties  
7.6 Chemistry:
7.6.1 Nutrients: Minerals used as passive tracers
7.6.2 Carbon Depends on host model
7.6.3 Pesticides None
7.6.4 Other contaminants None
7.7 Weather: Interactive (GCM) or prescribed(CTM)
8 Input Data (* = Mandatory)
8.1 Weather: Precipitation*, surface air temperature*, humidity*, pressure*, winds*, radiative fluxes*
8.2 Soil: Optional, texture defaults to IGBP-DIS
8.3 Hydrology: None required
8.4 Plant cover: Optional, defaults to Kergoat (199?)
8.5 Soil surface cover:  
8.6 Management: -
8.7 Topography/site characteristics: = Optional, defaults to GTOPO30
8.8 Micro-topography: -
8.9 Other Optional apherical particle shape specification
9 Output data

Size resolved particle number and mass fluxes, optical depth, radiative effects, boundary layer turbulence parameters

10 Programming language Fortran 90
11 Computer requirements PC for box model mode, supercomputer for climate simulations
12 Documentation
12.1 Scientific documentation:

Zender, C. S., H. Bian, and D. Newman, The mineral Dust Entrainment And Deposition (DEAD) model: Description and 1990's dust climatology, In Press in J. Geophys. Res., 2003.

Zender, C. S., D. Newman, and O. Torres, Spatial Heterogeneity in Aeolian Erodibility: Uniform, Topographic, Geomorphic, and Hydrologic Hypotheses, In Press in J. Geophys. Res., 2003.

12.2 User's guide: In preparation
12.3 Technical documentation:
13 Availability
14 Other Relevant Information

Homepage links to all relevant papers. Box model runs online over the Web for easy demonstration of sensitivity tests.

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