Extensive field work at the CRYOLINK sites
During August 2010 extensive field work was done at the CRYOLINK field sites. This included refraction seismics and electrical resistivity tomography, as well as downloading of data from sites recording air and ground temperatures. The combination of the two geophysical techniques will hopefully improve our understanding of the permafrost distribution and dynamics in southern Norway.
A rather wet field work team at Juvvass in Jotunheimen, southern Norway. From left: Cecile Pellet (University of Fribourg), Rune Ødegård (HiG), Martin Bathen, Bernd Etzelmüller (UiO), Christian Hauck (University of Fribourg), Christin Hilbich (University of Zurich), Tobias Hipp (UiO), Herman Farbrot (UiO) and Ketil Isaksen (met.no). Photo provided by K. Isaksen.
In addition to the field work, parts of the CRYOLINK team, as part of the project group in the Climate Partk 2469, took part in guiding the Minister of the Environment of Norway, Erik Solheim, around at Juvvass. Solheim showed great concerns regarding impacts of climate changes and the fate of permafrost in the mountains of Norway.
The winter 2009-2010 had in southern Norway lower air temperatures and less snow than the previous winter. Hence, at most CRYOLINK boreholes there has been an enhanced frost penetration in the ground (see figure). This may be balanced, however, by the rather warm summer 2010.
Evolution of ground temperature in a non-permafrost borehole at Juvvass, 1468 m a.s.l. (Juv-BH5). The thickness of seasonal frost is considerably greater than the previous year due to lower air temperatures and less snow this winter. At the time of writing (August 10, 2010) the ground at this site is still frozen at 3-6 m depth. This borehole may have experienced permafrost in the near past.