28. February 2008
permafrost borehole drilling campaign started in
person for additional information: Hanne H.
and photos by Hanne H. Christiansen
here for link to article in Svalbardposten March 7, 2008.
establish permafrost temperature monitoring in different landforms a winter
drilling campaign has started today with a successful drilling of a 9.8 m deep
borehole in glaciofluvial sediments in the central part of Longyearbyen valley.
The hole was drilled app. 100 m south of Longyearbyen school, in challenging
meteorological conditions with an air temperature of -17ºC, and with a wind
speed of 10 m/s, so the effective air temperature was close to -40ºC. Never the
less Jomar Finseth from Sintef and his assistant Ørjan Nerland, NGI, managed
with the Sintef/UNIS drillrigg Majgøril in one day to drill down to 10 m in the
coarse-grained glaciofluvial sediments, which has accumulated in the Longyear
Majgøril drillrigg in action in Longyear valley
28 February 2008
. Dust comes up as the drill hammers it way into the ground. Photo: Hanne H.
casing was inserted into the borehole, and a 9.5 m long thermistor string was
installed into the cased hole by TSP scientists and students immediately after
the drilling finished. The drilling lasted around 4 hours.
part of the international education activities in the TSP project, a school
permafrost borehole temperature monitoring programme is taking place,
coordinated by Dr. Kenji Yoshikawa, University
Alaska. This you find at http://www.uaf.edu/permafrost/.
Dr. Yoshikawa is installing permafrost monitoring projects in schools across Alaska. In
we assume that only
stands on permafrost, so most likely this will be the only Norwegian school to
join this school permafrost monitoring network.
operation in front of Longyearbyen
School, looking north. The sun at noon now reaches almost to sea level on the south facing
mountain side north of Longyearbyen. Photo: Hanne H. Christiansen.
drilling campaign continues on Monday, when the drillrigg will be flown to the
mountain Gruvefjellet next to Longyear valley, so establish a 5 m long
thermistor string, which will be part of the measurements from the Gruvefjellet
meteorological station. These data will become available here on the TSP website
and on the UNIS website as part of the Gruvefjellet online meteorological
Happy backfilling the borehole after the casing is in place. Niklas Allroggen
and Hanne H. Christiansen. Photo: Stefanie Härtel.
thermistor string, Hanne H. Christiansen, Håvard Juliussen and Stefanie Härtel.
Photo: Niklas Allroggen.