Releases: CryoGrid/CryoGrid3
Model setup for representing lateral thermokarst in a peat plateau
CryoGrid 3 is a land-surface scheme dedicated to modeling of ground temperatures in permafrost environments. Its excess ice module Xice is capable of simulating ground subsidence and thermokarst lake formation due to melting of excess ground ice. The basic version of CryoGrid 3 and Xice is described in the following article:
Westermann, S., Langer, M., Boike, J., Heikenfeld, M., Peter, M., Etzelmüller, B., & Krinner, G. (2016). Simulating the thermal regime and thaw processes of ice-rich permafrost ground with the land-surface model CryoGrid 3. Geosci. Model Dev., 9(2), 523–546. https://doi.org/10.5194/gmd-9-523-2016
This version v1.0.2 has been configured to represent vertical and lateral thermokarst processes and includes lateral transport of heat, water, and snow. It has been used for simulations of peat plateau degradation in northern Norway which are described in a research article accepted for publication in the scientific journal The Cryosphere:
Martin, L. C. P., Nitzbon, J., Scheer, J., Aas, K. S., Eiken, T., Langer, M., Filhol, S., Etzelmüller, B., & Westermann, S. (2020). Thermal erosion patterns of permafrost peat plateaus in northern Norway. The Cryosphere Discussions, 1–33. https://doi.org/10.5194/tc-2020-338
Version including linear infrastructure description
CryoGrid 3 is a land-surface scheme dedicated to modeling of ground temperatures in permafrost environments. Its excess ice module Xice is capable of simulating ground subsidence and thermokarst lake formation due to melting of excess ground ice. The basic version of CryoGrid 3 and Xice is described in Westermann et al. (2016).
This version (xice_mpi_IS_TC) has been extended to allow simulation of linear infrastructure by defining laterally coupled gravel road embankment tiles. It has been used for a research article in The Cryosphere (TCD 2020, see below).
References
Westermann, S., Langer, M., Boike, J., Heikenfeld, M., Peter, M., Etzelmüller, B., & Krinner, G. (2016). Simulating the thermal regime and thaw processes of ice-rich permafrost ground with the land-surface model CryoGrid 3. Geosci. Model Dev., 9(2), 523–546. https://doi.org/10.5194/gmd-9-523-2016
Schneider von Deimling, T., Lee, H., Ingeman-Nielsen, T., Westermann, S., Romanovsky, V., Lamoureux, S., Walker, D. A., Chadburn, S., Cai, L., Trochim, E., Nitzbon, J., Jacobi, S., and Langer, M.: Consequences of permafrost degradation for Arctic infrastructure – bridging the model gap between regional and engineering scales, The Cryosphere Discuss.
https://doi.org/10.5194/tc-2020-192, 2020.
CryoGrid 3 multi-scale tiling scheme
CryoGrid 3 is a land-surface scheme dedicated to modeling of ground temperatures in permafrost environments. Its excess ice module Xice is capable of simulating ground subsidence and thermokarst lake formation due to melting of excess ground ice. The basic version of CryoGrid 3 and Xice is described in the following article:
Westermann, S., Langer, M., Boike, J., Heikenfeld, M., Peter, M., Etzelmüller, B., & Krinner, G. (2016). Simulating the thermal regime and thaw processes of ice-rich permafrost ground with the land-surface model CryoGrid 3. Geosci. Model Dev., 9(2), 523–546. https://doi.org/10.5194/gmd-9-523-2016
This version v1.2.0 has been extended by a multi-scale tiling scheme. It has been used for simulations presented in a research article submitted to The Cryosphere and published as a preprint in The Cryosphere Discussions:
Nitzbon, J., Langer, M., Martin, L. C. P., Westermann, S., Schneider von Deimling, T., & Boike, J. (2020). Effects of multi-scale heterogeneity on the simulated evolution of ice-rich permafrost lowlands under a warming climate. The Cryosphere Discussions, 1–29. https://doi.org/10.5194/tc-2020-137
CryoGrid 3 set-up for ice-rich permafrost
CryoGrid 3 is a land-surface scheme dedicated to modeling of ground temperatures in permafrost environments. Its excess ice module Xice is capable of simulating ground subsidence and thermokarst lake formation due to melting of excess ground ice. The basic version of CryoGrid 3 and Xice is described in the following article:
Westermann, S., Langer, M., Boike, J., Heikenfeld, M., Peter, M., Etzelmüller, B., & Krinner, G. (2016). Simulating the thermal regime and thaw processes of ice-rich permafrost ground with the land-surface model CryoGrid 3. Geosci. Model Dev., 9(2), 523–546. https://doi.org/10.5194/gmd-9-523-2016
Version v1.0.0 has been extended by a hydrology scheme for unfrozen ground conditions, and schemes for the lateral transport of heat, water, and snow between adjacent parts of the simulated environment. It has been set-up to study the degradation of ice-wedge polygons as described in the following article:
Nitzbon, J., Langer, M., Westermann, S., Martin, L., Aas, K. S., & Boike, J. (2019). Pathways of ice-wedge degradation in polygonal tundra under different hydrological conditions. The Cryosphere, 13, 1089–1123. https://doi.org/10.5194/tc-13-1089-2019
The version of this release v1.1.0 has been extended by a scheme for the lateral transport of sediment within the simulated environment. It has been used for the simulations related to a research article on the response of ice-rich permafrost to a warming climate.
CryoGrid 3 set-up for ice-wedge polygons
CryoGrid 3 is a land-surface scheme dedicated to modeling of ground temperatures in permafrost environments. Its excess ice module Xice is capable of simulating ground subsidence and thermokarst lake formation due to melting of excess ground ice. The basic version of CryoGrid 3 and Xice is described in the following article:
Westermann, S., Langer, M., Boike, J., Heikenfeld, M., Peter, M., Etzelmüller, B., & Krinner, G. (2016). Simulating the thermal regime and thaw processes of ice-rich permafrost ground with the land-surface model CryoGrid 3. Geosci. Model Dev., 9(2), 523–546. https://doi.org/10.5194/gmd-9-523-2016
The model version of this release v1.0.0 has been extended by a hydrology scheme for unfrozen ground conditions, and schemes for the lateral transport of heat, water, and snow between adjacent parts of the simulated environment. It has been set-up to study the degradation of ice-wedge polygons as described in the following article which has been accepted for publication:
Nitzbon, J., Langer, M., Westermann, S., Martin, L., Aas, K. S., & Boike, J. (2018). Pathways of ice-wedge degradation in polygonal tundra under different hydrological conditions. The Cryosphere Discussions, 1–61. https://doi.org/10.5194/tc-2018-211
The parameters are set to the default values that were used for the simulations in the article. Parameters different from the default values can be specified in the main script CryoGrid3_xice_mpi.m (general parameters) and in the function get_parallel_variables.m (tile-specific parameters) which is part of the module cryoGridLateral.
To start the program, run the script CryoGrid3_xice_mpi.m. The default output directory is ./runs/.