19. March 2008
permafrost temperatures online!
person for additional information: Hanne H.
by Hanne H. Christiansen, UNIS
the first time permafrost temperatures are now online in
. Monday 3 March the Sintef/UNIS drillrigg Majgøril and its crew were flown up
to the central part of the plateau mountain Gruvefjellet, 450 m above
Longyearbyen. Jomar Finseth, Sintef, conducted a drilling to 5 m into the rocks
and a thermistor string was installed in the borehole. Lene Kristensen, Ulrich
Neumann and Markus Eckersdorfer, Geology Department at UNIS, assisted in the
drilling and logistics on site. Jørgen Haagensli, UNIS logistics, organised the
logistical operation with Jomar Finseth. Stefan Claes, UNIS logistics, have
designed the website ground temperature layout. Ole Humlum, Geology department
UNIS, established the Gruvefjellet meteorological station in 2000, and it was
expanded and became online in 2006 as part of the overall UNIS improval to
ensure easy access to environmental data for UNIS researchers, UNIS students and
all others interested.
1. The Sintef/UNIS drillrigg Majgøril is arriving with the Superpuma helicopter
Monday 3 March 2008
2. The drilling operation took place close to the meteorological station at 464
Gruvefjellet the thermistor string is connected to the UNIS meteorological
station. This station with all its standard meteorological observations is
online via the UNIS front website, and so now you can also study the temperature
in the permafrost in Gruvefjellet. Click here to
see online data from the Gruvefjellet station.
in the permafrost top varies during the year. In this part of the permafrost,
where temperatures are most affected by air temperature changes and how much
snow is covering the site. You can study this now on the website, and see that
the upper thermistors in the borehole are following the air temperature with
some delay. And that the ground temperature experiences much smaller variations
than the air temperature. The lower thermistors in particular only have measure
smaller variations, as it takes time for temperature changes to travel through
the ground. Therefore annual temperature variations only reach down to about 10
to 20 m in the ground. Below this depth the temperature is determined by the
climate back in time.
important part of the TSP NORWAY project is to obtain a snapshot of the
permafrost temperatures in the study areas during the IPY period, and to
disseminate this information so that it is available also for education and
outreach. In the future also the temperatures from the deeper Janssonhaugen
borehole in Svalbard will soon be online, just as one of the boreholes in Troms
at Kistefjell, will come online.