Model:Lake-Permafrost with Subsidence

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Contact

Name Nora Matell
Type of contact Model developer
Institute / Organization INSTAAR, University of Colorado
Postal address 1 450 UCB
Postal address 2
Town / City Boulder
Postal code 80305
State Colorado
Country USA"USA" is not in the list (Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, Argentina, Armenia, Australia, Austria, ...) of allowed values for the "Country" property.
Email address nlmatell@gmail.com
Phone
Fax



Lake-Permafrost with Subsidence


Metadata

Summary

Also known as
Model type Single
Model part of larger framework
Note on status model
Date note status model

Technical specs

Supported platforms
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 2008
Does model development still take place? No
If above answer is no, provide end year model development 2009
Code development status
When did you indicate the 'code development status'?
Model availability As code
Source code availability
(Or provide future intension)
Through owner"Through owner" is not in the list (Through web repository, Through CSDMS repository) of allowed values for the "Source code availability" property.
Source web address
Source csdms web address
Program license type GPL v2
Program license type other
Memory requirements --
Typical run time --


In/Output

Describe input parameters Daily average solar radiation for location (at surface).
Input format
Other input format Matlab .mat file
Describe output parameters Matlab variables, Matlab graphs
Output format
Other output format Matlab variables, Matlab graphs
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


Process

Describe processes represented by the model Heat conduction in permafrost, lake ice growth-decay, permafrost subsidence due to excess ice
Describe key physical parameters and equations Heat conduction equations, lake ice growth-decay equations
Describe length scale and resolution constraints Near surface, length scale should be 5-10 cm if subsidence occurring. Deeper in permafrost, 1+ m okay.
Describe time scale and resolution constraints Model needs daily (or smaller) timesteps.
Describe any numerical limitations and issues Runs slowly - iterates implicit scheme. Some sort of matrix algebra might improve speed.


Testing

Describe available calibration data sets --
Upload calibration data sets if available:
Describe available test data sets Permafrost model can be tested with ground temperature time series at several depths. Lake model can be tested with known ice depths (though snow, not accounted for in model, can affect depth by several 10s of cm).
Upload test data sets if available:
Describe ideal data for testing Lake temperature time series, known lake depth, underlying permafrost time series. Surface temperature time series as input (not air temperature).


Other

Do you have current or future plans for collaborating with other researchers? --
Is there a manual available? No
Upload manual if available:
Model website if any
Model forum / discussion board
Comments


Introduction

History

Papers

Issues

Help

Input Files

Output Files

Download

Source