Model:CVPM

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CVPM

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as Control Volume Permafrost Model Model type Modular Model part of larger framework Note on status model Date note status model Incorporated models or components: Spatial dimensions 1D, 2D, 3D Spatial extent Landscape-Scale, Patch-Scale, Reach-Scale, Regional-Scale, Watershed-Scale Model domain Terrestrial, Cryosphere One-line model description Multidimensional heat-transfer modeling system for permafrost with advanced unfrozen water physics Extended model description The Control Volume Permafrost Model (CVPM) is a modular heat-transfer modeling system designed for scientific and engineering studies in permafrost terrain, and as an educational tool. CVPM implements the nonlinear heat-transfer equations in 1-D, 2-D, and 3-D cartesian coordinates, as well as in 1-D radial and 2-D cylindrical coordinates. To accommodate a diversity of geologic settings, a variety of materials can be specified within the model domain, including: organic-rich materials, sedimentary rocks and soils, igneous and metamorphic rocks, ice bodies, borehole fluids, and other engineering materials. Porous materials are treated as a matrix of mineral and organic particles with pore spaces filled with liquid water, ice, and air. Liquid water concentrations at temperatures below 0°C due to interfacial, grain-boundary, and curvature effects are found using relationships from condensed matter physics; pressure and pore-water solute effects are included. A radiogenic heat-production term allows simulations to extend into deep permafrost and underlying bedrock. CVPM can be used over a broad range of depth, temperature, porosity, water saturation, and solute conditions on either the Earth or Mars. The model is suitable for applications at spatial scales ranging from centimeters to hundreds of kilometers and at timescales ranging from seconds to thousands of years. CVPM can act as a stand-alone model, the physics package of a geophysical inverse scheme, or serve as a component within a larger earth modeling system that may include vegetation, surface water, snowpack, atmospheric or other modules of varying complexity. Keywords: permafrost, heat-transfer, multidimensional, Earth, Mars, Name Gary Clow Type of contact Model developer Institute / Organization Institute of Arctic and Alpine Research Postal address 1 University of Colorado Postal address 2 Campus Box 450 Town / City Boulder Postal code 80309-0450 State Colorado Country United States Email address gclow@colorado.edu Phone 1-303-735-7806 Fax Supported platforms Unix, Linux, Mac OS, Windows Other platform Programming language Matlab Other program language Code optimized Single Processor Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 2018 Does model development still take place? Yes If above answer is no, provide end year model development Code development status Active When did you indicate the 'code development status'? 2020 Model availability As code Source code availability (Or provide future intension) Through CSDMS repository Source web address Source csdms web address https://github.com/csdms-contrib/CVPM Program license type GPL v3 Program license type other Memory requirements variable Typical run time variable Describe input parameters Input parameters are provided through several user-supplied files (see the CVPM modeling system user's guide). Input format ASCII, Binary Other input format Describe output parameters The state of the system is periodically output to a binary file that can be read by the post-processing and visualization routines (see the CVPM modeling system user's guide). Output format Binary Other output format Pre-processing software needed? No Describe pre-processing software Post-processing software needed? No Describe post-processing software Visualization software needed? No If above answer is yes Other visualization software Describe processes represented by the model The primary processes are heat diffusion and phase change. Describe key physical parameters and equations The key parameters are temperature; density; heat capacity; thermal conductivity; porosity; volume fractions of ice, unfrozen water, and air; degree of water saturation; pore-water solute type and concentration; particle radii. Describe length scale and resolution constraints no known constraints Describe time scale and resolution constraints no known constraints Describe any numerical limitations and issues A documented numerical stability criterium must be adhered to for the solution to remain stable. 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? Is there a manual available? Yes Upload manual if available: Media:CVPM usersguide.pdf Model website if any Model forum / discussion board Comments This part will be filled out by CSDMS staff OpenMI compliant BMI compliant WMT component PyMT component Is this a data component DOI model 10.5281/zenodo.1237889 For model version 1.1 Year version submitted 2018 Link to file https://zenodo.org/record/1237889 Can be coupled with:

Model info Authors Gary Clow Source code View in CSDMS GitHub repository DOI Download CVPM version: 1.1 Doi: 10.5281/zenodo.1237889 Model citations Nr. of publications: 3 Total citations: 24 h-index: 3 m-quotient: 0.38 QR-code Link to this page Other models by author CVPM

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Nr. of publications:	3
Total citations:	24
h-index:	3
m-quotient:	0.38

Featured publication(s)	Year	Model described	Type of Reference	Citations
Clow, Gary; 2018. CVPM 1.1: a flexible heat-transfer modeling system for permafrost. Geoscientific Model Development, 11, 4889-4908. 10.5194/gmd-11-4889-2018 (View/edit entry)	2018	CVPM	Source code ref.	8
Zheng, Lei; Overeem, Irina; Wang, Kang; Clow, Gary D.; 2019. Changing Arctic River Dynamics Cause Localized Permafrost Thaw. Journal of Geophysical Research: Earth Surface, 124, 2324–2344. 10.1029/2019JF005060 (View/edit entry)	2019	CVPM River Temperature Model	Related theory	26
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