logo image for top of page



a core project of

S Westermann: Large-­‐scale monitoring of ground thermal condiFons through data fusion of remote sensing products

Description

This presentation was held at the DUE Permafrost 2014 workshop, 11 Febuary 2014, Frascati, Italy
Workshop: climate-cryosphere.org/meetings/due-permafrost-2014

 

Westermann, Sebastian
Department of Geosciences, University of Oslo, Oslo Norway
Email:

Remote sensing of permafrost has mainly focused on the evaluation of surface features to indirectly assess its state, e.g. through detection of thaw slumps in VNIR or radar images. Recently, Langer et al. (2013) presented a scheme that can quantify the physical variables ground temperature and thaw depth based on global data sets from remote sensors and atmospheric modeling. This data fusion approach employing MODIS land surface temperatures (LST), MODIS snow extent (SE), and GlobSnow snow water equivalent (SWE) has now been operationalized for large areas at a spatial scale of 1 km by using the thermal subsurface model CryoGrid 2 (Westermann et al. 2013). First model runs are available for the Lena River Delta, an area of about 50,000 km2, for which the accuracy and the main sources of uncertainty of the scheme are evaluated. In a further step, we extend the scheme to mountainous permafrost regions where GlobSnow SWE data are not available by employing an orographic precipitation model to downscale large-scale precipitation fields from ERA reanalyis. The potential of this method is evaluated with CryoGrid 2 runs across the strong climatic gradients on Svalbard.

References
- Langer, M., Westermann, S., Heikenfeld, M., Dorn, W., Boike, J.: Satellite-based modeling of permafrost temperatures in a tundra lowland landscape, Remote Sensing of Environment, 135, 12-24, 2013.
- Westermann, S., Schuler, T. V., Gisnås, K., and Etzelmüller, B.: Transient thermal modeling of permafrost conditions in Southern Norway, The Cryosphere, 7, 719-739, doi:10.5194/tc-7-719-2013, 2013.

Keywords: permafrost, modeling, remote sensing, MODIS, land surface temperature, snow

 

Mass Balance of the Antarctic Ice Sheet 1992-2008
(Media / Mass Balance of the Antarctic Ice Sheet 1992-2008)
Mass Balance of the Antarctic Ice Sheet 1992-2008 from ERS and ICESat: Gains exceed losses - Presented by Jay Zwally, NASA Goddard, USA
2012-Boundary-Layer-Workshop-Report
(Media / 2012-Boundary-Layer-Workshop-Report)
The atmosphere-ocean boundary layer in which sea ice resides includes many complex processes that require a more realistic treatment in GCMs, particularly as models move toward full earth system descriptions. The primary purpose of the workshop was to define and discuss such coupled processes...
2008-01 No. 10 Ice and Climate News
(Media / 2008-01 No. 10 Ice and Climate News)
- CliC Scientific Steering Group (comings and goings) - Atmosphere-Ocean General Circulation Models - Global Prediction: Permafrost - Operational Sea-Ice Analysis and Forecasting at met.no - Arctic Council Climate and Cryosphere Project - Seasonal Forecast of Antarctic Sea Ice - The Global...

View all

Back to Top