Model:ThawLake1D

ThawLake1D

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

Incorporated models or components:

Spatial dimensions	1D
Spatial extent	Point-Based, Watershed-Scale
Model domain	Terrestrial, Hydrology, Cryosphere
One-line model description	1-D numerical model of permafrost and subsidence processes.
Extended model description	This model a 1-D numerical model of permafrost and subsidence processes. It aims to investigate the subsurface thermal impact of thaw lakes of various depths, and to evaluate how this impact might change in a warming climate.

Keywords:	permafrost, thermal, subsurface, thaw lake, talik,

Supported platforms	Mac OS
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	2009
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
Source code availability (Or provide future intension)	Through CSDMS repository
Source web address
Source csdms web address	https://github.com/csdms-contrib/thawlake1d
Program license type	GPL v2
Program license type other
Memory requirements
Typical run time	2 hrs for 1000 year simulation

Describe input parameters	Requires an input file called: radin_dailyavg.mat This specifies the daily average incoming radiation.
Input format
Other input format
Describe output parameters	temperature time series at variable depths into the subsurface in deg C lake depth in m ice thickness in m
Output format
Other output format	matlab plots and variables
Pre-processing software needed?	No
Describe pre-processing software
Post-processing software needed?	Yes
Describe post-processing software	Matlab
Visualization software needed?	Yes
If above answer is yes	Matlab
Other visualization software

Describe processes represented by the model	ThawLake1D Model couples a permafrost thermal model, a lake ice model and a subsidence model. It models heat conductio through a lake-permafrost system, evaluating temperature with depth.
Describe key physical parameters and equations	- permafrost thermal model: calculates thermal condutivity and specific heat capacity - lake ice model: conduction of heat within water depending on incoming solar radiation - subsiidence model: melted permafrost cells with excess ice are subsided by the excess ice content. A talik can form under a lake
Describe length scale and resolution constraints	1D Uppermost 10 m has high resolution gridcells (0.05m). Below 10 m to 500 m depth, grid cells are coarser (1m).
Describe time scale and resolution constraints	Simulations are run at daily time step Total simulation duration is typically over 100's of years.
Describe any numerical limitations and issues

Describe available calibration data sets	Model is designed and calibrated for Alaska Coastal Plain. We calibrated the model against temperature data in the subsurface from the Drew point, AK, USGS meteorological station.
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?	Yes, the project is ongoing at CU Boulder and with USGS partners

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

Comments

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Can be coupled with:

Model info

Authors

Nora Matell

Overeem

Source code

Model citations

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Featured reference(s)	Open Access Status	Year	Type of Reference	Cited
Matell, N.; Anderson, R.S.; Overeem, I.; Wobus, C.; Urban, F.E.; Clow, G.D.; 2013. Modeling the subsurface thermal impact of Arctic thaw lakes in a warming climate. Computers & Geosciences, 5369–79. 10.1016/j.cageo.2011.08.028	closed	2013	a module overview describing a module	21