Model:Frost Model

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Frost Model




Metadata

Also known as FrostNumber
Model type Single
Model part of larger framework
Incorporated models or components:
Spatial dimensions 1D, 1.5D
Spatial extent Regional-Scale
Model domain Terrestrial, Cryosphere
One-line model description Frost model predicts the likelihood of occurrence of permafrost in the land surface based on the monthly temperature distribution
Extended model description This model implement the calculation of the 'Frost Number', a dimensionless ratio based on freezing and thawing degree days in the year. Specifically, the 'Air Frost Number' intents to predict the existence of permafrost at a given location based on a cosine-function approximating the annual temperature distribution.
Keywords:

annual temperature, cryosphere, permafrost,


First name Irina
Last name Overeem
Type of contact Technical contact
Institute / Organization CSDMS
Postal address 1 4001 Discovery Dr
Postal address 2
Town / City Boulder
Postal code 80303
State Colorado
Country United States
Email address irina.overeem@colorado.edu
Phone +1-303-4926631
Fax


First name Scott
Last name Stewart
Type of contact Technical contact
Institute / Organization CSDMS
Postal address 1 4001 Discovery Dr
Postal address 2
Town / City
Postal code 80303
State Colorado
Country United States
Email address scottincolorado@gmail.com
Phone
Fax


Supported platforms Unix, Mac OS
Other platform
Programming language Python
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 https://github.com/permamodel
Source csdms web address
Program license type BSD or MIT X11
Program license type other
Memory requirements small
Typical run time short


Describe input parameters USer-specified data on temperature distributions

We present the Frost model with a subsampled version of the CRU-NCEP reanalysis data for the region of Alaska. The geographical extent of this dataset has been reduced to greatly reduce the number of ocean, Aleatian Islands or Canadian pixels. The spatial resolution has been reduced by a factor of 13 in each direction, resulting in an effective pixel resolution of about 10km.

The data are monthly average temperatures for each month from January 1901 through December 2009.

Input format
Other input format NetCDF
Describe output parameters Air Frost number
Output format
Other output format NetCDF
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 NetCDF visualizationPanoply


Describe processes represented by the model The mean annual temperature of the warmest and coldest months at a given location gives a first-order estimate of distribution of permafrost.
Describe key physical parameters and equations [[Describe key physical parameters::F = [DDF/DDT]^(1/2)

F= Air Frost number DDF = Degree Days of Freezing DDT = Degree Days of Thawing]]

Describe length scale and resolution constraints There is no specific length scale and resolution to the index, as long as temperature conditions remains similar over the scale.
Describe time scale and resolution constraints mean annual conditions
Describe any numerical limitations and issues


Describe available calibration data sets N/A
Upload calibration data sets if available:
Describe available test data sets N/A
Upload test data sets if available:
Describe ideal data for testing N/A


Do you have current or future plans for collaborating with other researchers? This is part of a the Permafrost Model toolbox, current collaboration with Elchin Jafarov at Los Alamos National Labs and with Kevin Schaeffer at the National Snow and Ice Data Center, and Gary Clow at the USGS, Denver, is ongoing for development of this toolbox.
Is there a manual available? No
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 not possible
BMI compliant Yes
WMT component Yes
PyMT component Yes
Can be coupled with:
Model info
Citation indices Frost Model
Nr. of pubs: --
Citations: 0
h-index: --"--" is not a number.
Qrcode Frost Model.png
Link to this page



Introduction

History

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

References




Citation indices Frost Model
Nr. of pubs: --
Citations: 0
h-index: --"--" is not a number.



Featured publication(s)YearModel describedType of ReferenceCitations
Nelson, Frederick E.; Outcalt, Samuel I.; 1987. A Computational Method for Prediction and Regionalization of Permafrost. Arctic and Alpine Research, 19, 279. 10.2307/1551363
(View/edit entry)
1987Frost Model
Related theory 160
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Input Files

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