Model:Alpine3D

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Alpine3D

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as Model type Modular Model part of larger framework Note on status model Date note status model Incorporated models or components: Spatial dimensions 3D Spatial extent Model domain One-line model description 3D model of alpine surface processes Extended model description Alpine3D is a model for high resolution simulation of alpine surface processes, in particular snow processes. The model can be driven by measurements from automatic weather stations or by meteoro-logical model outputs. The core three-dimensional Alpine3D modules consist of a radiation balance model (which uses a view factor approach and includes shortwave scattering and longwave emission from terrain and tall vegetation) and a drifting snow model solving a diffusion equation for suspended snow and a saltation transport equation. The processes in the atmosphere are thus treated in three dimensions and coupled to a distributed one dimensional model of vegetation, snow and soil model (Snowpack) using the assumption that lateral exchange is small in these media. The model is completed by a conceptual runoff module. The model modules can be run in a parallel mode, using the POP-C++ toolkit, using a grid infrastructure to allow computationally demanding tasks. Alpine3D is a valuable tool to investigate surface dynamics in mountains and is currently used to investigate snow cover dynamics for avalanche warning and permafrost development and vegetation changes under climate change scenarios. It could also be used to create accurate soil moisture assessments for meteorological and flood forecasting. Keywords: alpine surface processes, snow dynamics, Name Mathias Bavay Type of contact Technical contact Institute / Organization WSL/SLF Postal address 1 Flüelastrasse 13 Postal address 2 Town / City Davos Dorf Postal code 7260 State NO STATE Country Switzerland Email address bavay@slf.ch Phone 0814170265 Fax Name Michael Lehning Type of contact Model developer Institute / Organization Postal address 1 Postal address 2 Town / City Postal code State Country Email address Phone Fax Supported platforms Unix, Linux Other platform Programming language C++ Other program language Code optimized Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 1997 Does model development still take place? Yes If above answer is no, provide end year model development Code development status When did you indicate the 'code development status'? Model availability As code Source code availability (Or provide future intension) Through web repository Source web address http://models.slf.ch/ Source csdms web address Program license type GPL v3 Program license type other Memory requirements several Gbits (depends on the surface that is simulated) Typical run time hours to days Describe input parameters The area to be simulated has to be described (DEM, landuse). The meteorological input data (air temperature, relative humidity, precipitations...) have to be described (units, interpolations types). Some parameters about the model itself must be given (precision of the radiation ray tracing algorithms, characteristic lengths, parameters for a bucket model of runoff...) Input format ASCII Other input format Describe output parameters for every grid cell: air and surface temperature, relative humidity, short and long wave radiation, snow height, snow water content, albedo Global outputs: catchment discharge, surface and subsurface flow At user defined locations: full snow profiles (temperature profile, grain types, grain sizes, density, water content, liquid water content) Output format ASCII Other output format Pre-processing software needed? No Describe pre-processing software Post-processing software needed? No Describe post-processing software Visualization software needed? Yes If above answer is yes Other visualization software any software able to visualize data in a 2D grid Describe processes represented by the model Alpine3D is a model for high resolution simulation of alpine surface processes, in particular snow processes. The model can be driven by measurements from automatic weather stations or by meteoro-logical model outputs. The core three-dimensional Alpine3D modules consist of a radiation balance model (which uses a view factor approach and includes shortwave scattering and longwave emission from terrain and tall vegetation) and a drifting snow model solving a diffusion equation for suspended snow and a saltation transport equation. The processes in the atmosphere are thus treated in three dimensions and coupled to a distributed one dimensional model of vegetation, snow and soil model (Snowpack) using the assumption that lateral exchange is small in these media. The model is completed by a conceptual runoff module. Describe key physical parameters and equations Snow settling, temperature diffusion, snow saltation and suspension, snow metamorphism, terrain radiation. Describe length scale and resolution constraints The model has been used with cells from 5 meters up to kilometers scale. Describe time scale and resolution constraints The time scale constraints usually comes from the input meteorological data: each time step must be provided with a set of input data. Describe any numerical limitations and issues Overall, the model is very computationally intensive. It is usually ran on a grid or a cluster. Describe available calibration data sets Upload calibration data sets if available: Describe available test data sets Upload test data sets if available: Describe ideal data for testing Do you have current or future plans for collaborating with other researchers? The underlying 1D model (SNOWPACK) is already being used by various collaborating researchers/institutions. Is there a manual available? Yes Upload manual if available: Model website if any Model forum / discussion board Comments This part will be filled out by CSDMS staff OpenMI compliant No but possible BMI compliant No but possible WMT component Not yet"Not yet" is not in the list (Yes, In progress, No but possible, No not possible) of allowed values for the "Code CMT compliant or not" property. PyMT component Is this a data component Can be coupled with:

Model info Authors Mathias Bavay Lehning, Wever, Michel Source code Go to external source code site Model citations Nr. of publications: 54 Total citations: 2547 h-index: 26 m-quotient: 1.3 QR-code Link to this page Other models by author Alpine3D

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Nr. of publications:	54
Total citations:	2547
h-index:	26
m-quotient:	1.3

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