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Investigating the effects of lateral water flow on the spatial patterns of thaw depth


Endrizzi, Stefano; Gruber, Stephan (2012). Investigating the effects of lateral water flow on the spatial patterns of thaw depth. In: Tenth International Conference on Permafrost, Salekhard, Yamal-Nenets Autonomous District, Russia, 25 June 2012 - 29 June 2012, 91-96.

Abstract

The effects of lateral water flow on the spatial distribution of the thaw depth in permafrost terrain have rarely been investigated with models. The GEOtop model, which solves the soil energy and water budgets in a coupled way and accounts for phase change, has been used to better understand how soil moisture spatial differences in the unfrozen upper part of the ground affect the thawing soil energy balance in idealized hillslope topography. Results show that, in terrains with thermal conductivity highly variable with soil moisture such as organic soils, wetter areas exhibit deeper thaw than drier areas. Conversely, if thermal conductivity depends less on soil moisture, as in mineral soils, the result is the opposite since the effect of the higher thermal capacity resulting from higher soil moisture prevails.

The effects of lateral water flow on the spatial distribution of the thaw depth in permafrost terrain have rarely been investigated with models. The GEOtop model, which solves the soil energy and water budgets in a coupled way and accounts for phase change, has been used to better understand how soil moisture spatial differences in the unfrozen upper part of the ground affect the thawing soil energy balance in idealized hillslope topography. Results show that, in terrains with thermal conductivity highly variable with soil moisture such as organic soils, wetter areas exhibit deeper thaw than drier areas. Conversely, if thermal conductivity depends less on soil moisture, as in mineral soils, the result is the opposite since the effect of the higher thermal capacity resulting from higher soil moisture prevails.

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Additional indexing

Item Type:Conference or Workshop Item (Paper), not refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Event End Date:29 June 2012
Deposited On:14 Dec 2012 12:23
Last Modified:05 Apr 2016 16:13
Number:1
ISBN:978-5-905911-01-9
Free access at:Official URL. An embargo period may apply.
Official URL:http://www.ticop2012.org/upload/iblock/83b/83b336f940efdec30802d3610debb4f1.pdf
Permanent URL: https://doi.org/10.5167/uzh-68860

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