Model:Kudryavtsev Model


Kudryavtsev Model


Also known as Ku Model
Model type Single
Model part of larger framework
Note on status model
Date note status model
Incorporated models or components:
Spatial dimensions 1D, 1.5D, 2D
Spatial extent Regional-Scale
Model domain Terrestrial, Hydrology, Cryosphere
One-line model description Permafrost Active Layer Thickness Model based on Kudryavtsev's parametrization
Extended model description Models the temporal and spatial distribution of the active layer thickness and temperature of permafrost soils. The underlying approximation accounts for effects of air temperature, snow cover, vegatation, soil moisture, soil thermal properties to predict temperature at the ground surface and mean active layer thickness.

active layer thickness, permafrost, cryosphere,

Name Irina Overeem
Type of contact Project manager
Institute / Organization University of Colorado
Postal address 1 4001 Discovery Dr.
Postal address 2
Town / City Boulder
Postal code 80303
State Colorado
Country United States
Email address
Phone +1-303-4926631

Name Kang Wang
Type of contact Technical contact
Institute / Organization University of Colorado
Postal address 1 4001 Discovery Dr.
Postal address 2
Town / City Boulder
Postal code
State Colorado
Country United States
Email address

Supported platforms
Unix, Linux, Mac OS
Other platform
Programming language


Other program language
Code optimized Single Processor
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development 2016
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, As teaching tool
Source code availability
(Or provide future intension)
Through web repository
Source web address
Source csdms web address
Program license type BSD or MIT X11
Program license type other
Memory requirements N/A
Typical run time fast

Describe input parameters Air Temperature : seasonal range of air temperature

Snow parameters: winter-averaged Snow Thickness and Snow Density, thermal conductivity of snow Vegetation parameters: Vegetation height, vegetation thermal conductivity Soil properties: volumetric water content, heat capacity in frozen and thawed state

Input format
Other input format NetCDF
Describe output parameters Dampening effects of vegetation and snow on temperature

Mean annual active layer thickness Mean annual temperature at the permafrost ground surface

Output format
Other output format NetCDF
Pre-processing software needed? No
Describe pre-processing software
Post-processing software needed? Yes
Describe post-processing software Visualization of NetCDF files
Visualization software needed? Yes
If above answer is yes
Other visualization software Any NetCDF visualization codesPanoply

Describe processes represented by the model Kudryavtsev's parametrization treats a permafrost environment as a system of individual layers, each with their own thermal properties.

Air, snow, vegetation, soil each are separate layers and their thermal (insulatory effects) are quantified from layer thickness, their heat capacity and conductivity.

Describe key physical parameters and equations
Describe length scale and resolution constraints Solutions are generated for a 1D vertical column.

When input data are gridded, maps of 1D vertical columns can be made.

Describe time scale and resolution constraints yearly
Describe any numerical limitations and issues analytical solution

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? This model is part of the perma-model project which aims to built flexible cyberinfrastructure for permafrost modeling.

Close collaborators include: Elchin Jafarov at Los Alamos National Lab, NM Kevin Schaeffer at National Snow and Ice Data Center, Boulder, CO

Is there a manual available? No
Upload manual if available:
Model website if any
Model forum / discussion board

This part will be filled out by CSDMS staff

OpenMI compliant No not possible
BMI compliant Yes
WMT component Yes
PyMT component Yes
Is this a data component
Can be coupled with:
Model info
Nr. of publications: --
Total citations: 0
h-index: --"--" is not a number.
m-quotient: 0

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See also Model:Frost Model, another model in the Permamodel project.


Nr. of publications: --
Total citations: 0
h-index: --"--" is not a number.
m-quotient: 0

Featured publication(s)YearModel describedType of ReferenceCitations
Anisimov, Oleg A.; Shiklomanov, Nikolai I.; Nelson, Frederick E.; 1997. Global warming and active-layer thickness: results from transient general circulation models. Global and Planetary Change, 15, 61–77. 10.1016/S0921-8181(97)00009-X
(View/edit entry)
1997 Kudryavtsev Model
Related theory 184
Sazonova, T. S.; Romanovsky, V. E.; 2003. A model for regional-scale estimation of temporal and spatial variability of active layer thickness and mean annual ground temperatures. Permafrost and Periglacial Processes, 14, 125–139. 10.1002/ppp.449
(View/edit entry)
2003 GIPL
Kudryavtsev Model

Related theory

See more publications of Kudryavtsev Model



Input Files

Output Files