Title Thermal processes in the active layer of the Larsbreen rock glaciers, central Spitsbergen, Svalbard
Author Juliussen, H.; Humlum, O.; Kirstensen, L.; Christiansen, H.H.
Author Affil Juliussen, H., UNIS, University Centre in Svalbard, Norway. Other: University of Oslo, Norway
Source International Conference on Permafrost (ICOP) Proceedings, Vol.9, p.877-882, ; Ninth international conference on Permafrost, Fairbanks, AK, June 29-July 3, 2008, edited by D.L. Kane and K.M. Hinkel. Publisher: [publisher varies], [location varies], International
Publication Date 2008
Notes In English. 25 refs. CRREL Acc. No: 62006076
Index Terms active layer; freezing; glaciers; heat transfer; melting; meltwater; permafrost; permafrost heat transfer; rock glaciers; sediments; sublimation; temperature; thermal conductivity; thermal regime; water vapor; Norway; Spitsbergen; Arctic region; clastic sediments; coarse-grained materials; debris; Europe; infiltration; International Polar Year 2007-08; IPY 2007-08 Research Publications; Larsbreen Glacier; movement; processes; Scandinavia; Svalbard; Western Europe
Abstract A recent scientific focus on the thermal regime of openwork blocky deposits has lead to the conclusion that air circulation in the pore spaces and exchange with the atmosphere may be particularly important processes of heat transfer in such materials. This contradicts our data from the coarse openwork active layer of the Larsbreen rock glaciers. Visual observations and temperature data give inconsistent results on air circulation activity at this site and we conclude that this process seems less important here compared to what is reported from other areas. Other thermal processes at the site, in addition to conduction, include water vapour transport and subsequent sublimation, and meltwater infiltration followed by several refreezing and melting events. More data is needed to understand the complex process pattern in the coarse active layer of these rock glaciers, and further instrumentation is planned as part of the IPY- project "TSP Norway--Thermal State of Permafrost in Norway and Svalbard".
Publication Type conference paper or compendium article
Record ID 286163