Model:GIPL: Difference between revisions

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{{Model identity2
{{Model identity2
|Categories=Terrestrial
|ModelDomain=Terrestrial, Cryosphere
|Spatial dimensions=1D
|Spatial dimensions=1D
|Spatialscale=Global, Continental, Regional-Scale, Landscape-Scale
|Spatialscale=Continental, Global, Landscape-Scale, Regional-Scale
|One-line model description=GIPL(Geophysical Institute Permafrost Laboratory) is an implicit finite difference one-dimensional heat flow numerical model.
|One-line model description=GIPL(Geophysical Institute Permafrost Laboratory) is an implicit finite difference one-dimensional heat flow numerical model.
|Extended model description=GIPL(Geophysical Institute Permafrost Laboratory) is an implicit finite difference one-dimensional heat flow numerical model. The model was developed by V.Romanovsky and G. Tipenko at University of Alaska Fairbanks. First time the model was introduced at the 2004 AGU Conference Tipenko G. (2004). The model uses coarse vertical resolution grid which preserves the latent-heat effects in the phase transition zone, even under conditions of rapid or abrupt changes in the temperature fields. The air temperature is a major driving force for the GIPL model. The model includes upper boundary condition, constant geothermal heat flux at the lower boundary (typically from 500 to 1000 m) and temperature distribution at initial time. The other inputs are precipitation, prescribed water content and thermal properties of the multilayered soil column. As an output the model produces temperature distributions at different depths, active layer thickness and calculates time of freeze up. S. Marchenko and others in 2008 extend the model by developing pre-processing procedures which convert GIS format input data into GIPL format. E. Jafarov parallelized the GIPL code in order to run the model on supercomputers with finer grid resolution. First run of parallel UAF-GIPL2.0 model was in November 2009. The model is still under constant testing and development. However the preliminary results are available in the form of netcdf files. The preliminary results includes temperatures at different depths and active layer thickness. The detailed paper about the parallel model is under development.
|Extended model description=GIPL(Geophysical Institute Permafrost Laboratory) is an implicit finite difference one-dimensional heat flow numerical model. The GIPL model uses the effect of snow layer and subsurface soil thermal properties to simulate ground temperatures and active layer thickness (ALT) by solving the 1D heat diffusion equation with phase change. The phase change associated with freezing and thawing process occurs within a range of temperatures below 0 degree centigrade, and is represented by the unfrozen water curve (Romanovsky and Osterkamp 2000). The model employs finite difference numerical scheme over a specified domain. The soil column is divided into several layers, each with distinct thermo-physical properties. The GIPL model has been successfully used to map permafrost dynamics in Alaska and validated using ground temperature measurements in shallow boreholes across Alaska (Nicolsky et al. 2009, Jafarov et al. 2012, Jafarov et al. 2013, Jafarov et al. 2014).
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|First name=Elchin
|First name=Elchin
|Last name=Jafarov
|Last name=Jafarov
|Institute / Organization=Univ. of Alaska Fairbanks
|Type of contact=Model developer
|Town / City=Fairbanks
|Institute / Organization=University of Colorado
|Postal code=99775
|Town / City=Boulder
|State=Alaska
|Postal code=80309
|Country=US
|Country=United States
|Email address=eejafarov@alaska.edu
|State=Colorado
|Email address=Elchin.Jafarov@colorado.edu
}}
}}
{{Model technical information
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|Start year development=2000
|Start year development=2000
|Does model development still take place?=Yes
|Does model development still take place?=Yes
|End year development=
|DevelopmentCode=As is, no updates are provided
|DevelopmentCodeYearChecked=2020
|Model availability=As code
|Model availability=As code
|Source code availability=Through CSDMS repository
|Source code availability=Through web repository
|Source web address=
|Source web address=https://github.com/Elchin/GIPL
|ViewVC web address=http://csdms.colorado.edu/viewvc/gipl/
|Program license type=Other
|Program license type=Other
|Typical run time=it takes less than a minite to run the serial model for one with daily time interval
|Typical run time=it takes less than a minite to run the serial model for one with daily time interval
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|Manual model available=No
|Manual model available=No
|Model manual=
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{{Additional comments model}}
{{Additional comments model}}
{{CSDMS staff part
{{CSDMS staff part
|OpenMI compliant=No not possible
|OpenMI compliant=No but possible
|CCA component=No not possible
|IRF interface=No but possible
|IRF interface=No not possible
|CMT component=In progress
|CMT component=In progress
|PyMT component=Yes
|CCA component=No but possible
}}
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{{DOI information
{{DOI information
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|DOI assigned to model version=0.1
|DOI assigned to model version=0.1
|DOI-year assigned to model version=2011
|DOI-year assigned to model version=2011
|DOI-filelink=https://csdms.colorado.edu/pub/models/doi-source-code/gipl-10.1594.IEDA.100131-0.1.tar.gz
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== Introduction ==
== Introduction ==


GIPL(Geophysical Institute Permafrost Laboratory) is an implicit finite difference one-dimensional heat flow numerical model. The model was developed by V.Romanovsky and G. Tipenko at University of Alaska Fairbanks. First time GIPL was introduced at the 2004 AGU Conference Tipenko G. (2004). The model uses coarse vertical resolution grid which preserves the latent-heat effects in the phase transition zone, even under conditions of rapid or abrupt changes in the temperature fields. It includes upper boundary condition (usually air temperature), constant geothermal heat flux at the lower boundary (typically from 500 to 1000 m) and initial temperature distribution with depth. The other inputs are precipitation, prescribed water content and thermal properties of the multilayered soil column. As an output the model produces temperature distributions at different depths, active layer thickness and calculates time of freeze up. S. Marchenko and others in 2008 extended the model by developing pre-processing procedures which convert GIS format input data into GIPL format. E. Jafarov parallelized the GIPL code in order to run the model on supercomputers with finer grid resolution. The first run of parallel UAF-GIPL2.0 model was in November 2009. The model is still under constant testing and development. However the preliminary results are available in the form of netcdf files. The preliminary results includes temperatures at different depths and active layer thickness. The detailed paper about the parallel model is under development.
GIPL(Geophysical Institute Permafrost Laboratory) is an implicit finite difference one-dimensional heat flow numerical model.The model uses fine vertical resolution grid which preserves the latent-heat effects in the phase transition zone, even under conditions of rapid or abrupt changes in the temperature fields. It includes upper boundary condition (usually air temperature), constant geothermal heat flux at the lower boundary (typically from 500 to 1000 m) and initial temperature distribution with depth. The other inputs are precipitation, prescribed water content and thermal properties of the multilayered soil column. As an output the model produces temperature distributions at different depths, active layer thickness and calculates time of freeze up. The results include temperatures at different depths and active layer thickness, freeze-up days.  


== IRF  ==
== IRF  ==
The spatial model consist of three parts: pre-processing, GIPL run and post-processing.
As an input data for the model we use the SNAP(Scenarios Network Planning for Alaska) five GCM composite dataset with A1B emission scenario, which is available on-line and can be freely downloaded from the SNAP web-site.
Pre_processing includes processing of the SNAP dataset by converting it to GIPL input format. When the input dataset is ready we run the Message Passing Interface (MPI) parallel GIPL model. After GIPL run we post-process the model output by converting it netcdf univariate format, which then can by visualized with freely and commercially available softwares like ncview, IDV or ArcGIS.




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== References  ==
== References  ==
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== Links ==
== Links ==
http://www.wunderground.com/climate/permafrost.asp?MR=1

Latest revision as of 19:17, 16 September 2020



GIPL


Metadata

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 Continental, Global, Landscape-Scale, Regional-Scale
Model domain Terrestrial, Cryosphere
One-line model description GIPL(Geophysical Institute Permafrost Laboratory) is an implicit finite difference one-dimensional heat flow numerical model.
Extended model description GIPL(Geophysical Institute Permafrost Laboratory) is an implicit finite difference one-dimensional heat flow numerical model. The GIPL model uses the effect of snow layer and subsurface soil thermal properties to simulate ground temperatures and active layer thickness (ALT) by solving the 1D heat diffusion equation with phase change. The phase change associated with freezing and thawing process occurs within a range of temperatures below 0 degree centigrade, and is represented by the unfrozen water curve (Romanovsky and Osterkamp 2000). The model employs finite difference numerical scheme over a specified domain. The soil column is divided into several layers, each with distinct thermo-physical properties. The GIPL model has been successfully used to map permafrost dynamics in Alaska and validated using ground temperature measurements in shallow boreholes across Alaska (Nicolsky et al. 2009, Jafarov et al. 2012, Jafarov et al. 2013, Jafarov et al. 2014).
Keywords:

heat flow, permafrost,

Name Elchin Jafarov
Type of contact Model developer
Institute / Organization University of Colorado
Postal address 1
Postal address 2
Town / City Boulder
Postal code 80309
State Colorado
Country United States
Email address Elchin.Jafarov@colorado.edu
Phone
Fax


Supported platforms
Unix, Linux, Windows
Other platform
Programming language

Fortran90, Matlab

Other program language
Code optimized Single Processor, Multiple Processors
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development 2000
Does model development still take place? Yes
If above answer is no, provide end year model development
Code development status As is, no updates are provided
When did you indicate the 'code development status'? 2020
Model availability As code
Source code availability
(Or provide future intension) 		Through web repository
Source web address https://github.com/Elchin/GIPL
Source csdms web address
Program license type Other
Program license type other
Memory requirements
Typical run time it takes less than a minite to run the serial model for one with daily time interval


Describe input parameters Upper Boundary (Air temperature)

Lower Boundary (Temperature gradient) Initial conditions (Temperature distribution at initial time) Thermo-physical properties

Input format ASCII
Other input format
Describe output parameters Temperature distribution with depth

Active Layer Depth Freezing/Thawing day

Output format ASCII
Other output format netcdf, GIS
Pre-processing software needed? Yes
Describe pre-processing software For spatial case one can developed its own pre-processing in order to put the input dataset in the format readable for GIPL.
Post-processing software needed? Yes
Describe post-processing software To generate netcdf or GIS outputs one can write its own converter for that.
Visualization software needed? Yes
If above answer is yes ESRI, Matlab
Other visualization software Matlab, Microsoft Excel (for serial); Matlab, ARCGIS, ncview (for spatial model)


Describe processes represented by the model Main purpose of the model is to calculate subsurface temperature profile, active layer depth and freeze-up day.
Describe key physical parameters and equations Thermal capacities and conductivities prescribed for each subsurface layer, volumetric water content and unfrozen water coefficients.
Describe length scale and resolution constraints
Describe time scale and resolution constraints
Describe any numerical limitations and issues


Describe available calibration data sets We have tested the model for different permafrost observation sites for Alaska(USA) and Siberia(Russia). Typically, the model results show good correlation with measured data (if observations are accurate).
Upload calibration data sets if available: Media:Sample.zip
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? 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 but possible
BMI compliant No but possible
WMT component In progress
PyMT component Yes
Is this a data component
DOI model 10.1594/IEDA/100131
For model version 0.1
Year version submitted 2011
Link to file https://csdms.colorado.edu/pub/models/doi-source-code/gipl-10.1594.IEDA.100131-0.1.tar.gz
Can be coupled with:
Model info
Authors
Elchin Jafarov
Source code
DOI

Model citations
Nr. of publications: 30
Total citations: 1331
h-index: 17
m-quotient: 0.81
QR-code

Link to this page
Other models by author



Introduction

GIPL(Geophysical Institute Permafrost Laboratory) is an implicit finite difference one-dimensional heat flow numerical model.The model uses fine vertical resolution grid which preserves the latent-heat effects in the phase transition zone, even under conditions of rapid or abrupt changes in the temperature fields. It includes upper boundary condition (usually air temperature), constant geothermal heat flux at the lower boundary (typically from 500 to 1000 m) and initial temperature distribution with depth. The other inputs are precipitation, prescribed water content and thermal properties of the multilayered soil column. As an output the model produces temperature distributions at different depths, active layer thickness and calculates time of freeze up. The results include temperatures at different depths and active layer thickness, freeze-up days.

IRF

Issues

Does not include convective heat transfer.

Visualization


References



Nr. of publications: 30
Total citations: 1331
h-index: 17
m-quotient: 0.81



Featured publication(s)YearModel describedType of ReferenceCitations
Jafarov, E E; Romanovsky, V E; Genet, H; McGuire, A D; Marchenko, S S; 2013. The effects of fire on the thermal stability of permafrost in lowland and upland black spruce forests of interior Alaska in a changing climate. Environmental Research Letters, 8, 035030. 10.1088/1748-9326/8/3/035030
(View/edit entry)		2013 GIPL
 Model application 122
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 114
See more publications of GIPL


Links

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