View source for HPCCprojects:Numerical Modeling of Permafrost Dynamics in Alaska using a High Spatial Resolution Dataset

<!--
How to create a new "HPCCproject" page:
1) Log in to the wiki
2) Create a new page for each HPCCproject, by using the following URL:
   * http://csdms.colorado.edu/wiki/HPCCproject:<projectname>
   * Replace <projectname> with the name of the project
3) Than follow the link "edit this page"
   * Now you will see preloaded text. Hit the button "Show Preview" at the bottom, below the edit window
   * You will see gray text; replace the gray text with help text and hit the button "save" and your help document is all done.

You can re-edit the page whenever you want.
-->
__NOTOC__
={{PAGENAME}}=
==Project description==
Permafrost is a lithospheric material where temperatures have remained at or below 0°C for a period of at least two consecutive years.<br />
Permafrost is one of the main components of the cryosphere in northern
regions, which influences hydrological processes, energy exchanges,
natural hazards and carbon budgets. Recent publications report a
gradual increase of mean annual permafrost temperatures in Alaska
(Romaniovsky et al., 2010 and Smith et al., 2010). Thawing of
permafrost might cause the land to sink and collapse, damaging
forests, homes, and infrastructure. Economists estimate that thawing
permafrost will add billions of dollars in repair costs to public
infrastructure (Larsen et al., 2008).<br />
The nature of permafrost existence is complex enough and cannot be
addressed based only on climatic data (Shur and Jorgenson, 2007). In
this project we employed more sophisticated approach which includes all important factors affecting permafrost thermal regime such as snow, organic layer, soil physical properties and subsurface water content. We employ GIPL2-MPI transient heat flow model for the entire Alaska permafrost domain. As a climate forcing we used the composite of five IPCC Global Circulation Models that according to Scenarios Network for Alaska Planning ([http://www.snap.uaf.edu/ SNAP]) performed the best in Alaska. Researchers from SNAP scaled down the outputs from these five models to 2 kilometers resolution using the PRISM model, which takes into account elevation, slope, and aspect. All derived values represent a single month within a given year for the five-model composite, A1B carbon emission scenario.<br />
The original version of the model was developed by G. Tipenko and V. Romanovsky (2004). Later it was extended to the spatial case and first time applied for the entire Alaskan permafrost domain with 0.5° spatial resolution by Marchenko et al., (2008). <br />
To determine the social-economic impact of permafrost thaw on ecosystem and infrastructure higher spatial resolution is required. In order to employ the model to simulate the ground temperatures in higher spatial resolution we need make it parallel by distributing the amount of computational load  between processors. The GIPL2-MPI is a parallel version of the GIPL2 spatial model used by Marchenko et al., 2008.
==Objectives==
* How well is the simulated map represent the current thermal state of permafrost? (model calibration and validation)

* The importance of microclimate and other environmental controls affecting permafrost thermal regime.

* What might be the possible permafrost thermal state by the end of 21st century?
==Time-line==
{|
|Start date:
|01/01/2008
|-
|End date:
|12/31/2014
|}
==Models in use==
{|
| [[Model:GIPL|GIPL]]
| numerical transient heat flow model
|}
==Results==
<span class="remove_this_tag">List the results of your project</span>
==Users==
* Sergei Marchenko
* Elchin Jafarov
==Funding==
Financial support provided by the National Science Foundation ( projects [http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0520578 0520578];
[http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0632400 0632400];
[http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0856864 0856864]) and the State of
Alaska.

==Publications and presentations==
Larsen, P. H., S. Goldsmith, O. Smith, M. L. Wilson, K. Strzepek, P. Chinowsky.and B. Saylor, 2008: Estimating future costs for Alaska public infrastructure at risk from climate change. Global Environmental Change, 18(3): 442-457.

Marchenko, S., Romanovsky, V., Tipenko, G., 2008. Numerical modeling of spatial permafrost dynamics in Alaska, in: In Proceedings of the Eighth International Conference on Permafrost, Willey, Institute of Northern Engineering, University of Alaska, Fairbanks. pp. 190–204.

Romanovsky, V.E., Smith, S.L., Christiansen, H.H., 2010. Permafrost thermal state in the polar northern hemisphere during the international polar year 2007–2009: a synthesis. Permafrost and Periglacial Processes 21, 106–116.

Shur YL, Jorgenson MT. 2007. Patterns of permafrost
formation and degradation in relation to climate and
ecosystems. Permafrost and Periglacial Processes 18:
7–19. doi: 10.1002/ppp.582

Smith, S., Romanovsky, V., Lewkowicz, A., Burn, C., Allard, M., Clow, G., Yoshikawa, K., Throop, J., 2010. Thermal state of permafrost in North America: a contribution to the international polar year. Permafrost and Periglacial Processes, Fall Meet. Suppl., Abstract C12A-02 21, 117–135.

Tipenko, G., Marchenko, S., Romanovsky, V., Groshev, V., Sazonova, T., 2004. Spatially distributed model of permafrost dynamics in alaska. EOS, Transactions of the AGU, 85(47), Fall Meet. Suppl., Abstract C12A-02 .
==Links==
[http://permafrost.gi.alaska.edu/about The Geophysical Institute Permafrost Laboratory]

[[Category:Research project]]