May 5, 2023

Logging the deep bore hole

Grant in the drillers cabin, operating the logger.


After having a bit of trouble with the logger yesterday, the drillers managed to log the entire deep bore hole today. It will be very exciting to compare new and old data to see if we see any signs of differential movement (shear) of the layers in the bottom part of the hole. Given that our entire camp moves about a meter a week, it is a big question how fast the ice is moving near the bedrock. Maybe the velocity is the same from top to bottom, and the entire ice column is sliding over the bed, or maybe we have a lot of deformation in the bottom layers.
Hopefully we will know much more by the end of this season!
On the surface Sverrir continues to level the camp, and has also started the process of excavating the third Pistenbully with assistance from Nico. Other excavation tasks are continuously carried out by Sepp.
Furthermore, the fuel tank in camp was brought up to the surface by Sverrir. Sepp and Bo made the most of todays low winds and raised all Skiway markers including all lead in flags. The outermost WSW lead in flags needed some adjustment (1-2m), likely due to differential ice flow near the shear margin. The motion detection radar system was also tested today. Just as last year it was fully able to detect a person crawling on all fours some 1.5km away from camp. The webcam on the dome was dismounted, dried out of inside condensate and remounted on the dome.
In the science trench, Nico managed to get the DEP, swiss saw, physical properties vertical saw and the speaker system up and running. Inside the dome Jeppe and Anna-Maria cleaned up and organized the breakfast and kitchen shelve systems.

What we did today:

  1. Logged the entire deep bore hole.
  2. Got DEP and Swiss saw up and running in science trench.
  3. Continued grooming and leveling of camp.
  4. Raised all skiway markers, including lead-in flags.
  5. Got rid of condensation inside webcam lenses.
  6. Continued improvements of camp electrical system and appliances.
  7. Motion detection radar system successfully tested.

Ad 5: A responsibility of the FL is to delegate tasks in order to make operations at EGRIP as efficient as possible. Today I forgot that and took it upon myself to get the inside condensate out of the webcam. Trying for an hour to heat up the webcam on the roof of the cupola, all I managed was to entertain camp on the live feed! After much frustration and a growing desire to smash the bloody thing, Sverrir took pity on me (or the webcam?) and simply dismounted it and dried it out in the generator room. Fingers crossed that it will now stay clear!

Weather today: Some clouds moving in and out, diamond dust in the morning. Temp. -35°C to -23°C. Wind: 2-9 kt from W gradually decreasing during the day. Visibility: Unrestricted, except during the morning, where was down to some 1000m during diamond dust.

FL, Bo M. Vinther

The morning sun at EGRIP with a beautiful halo.

Left: No, EGRIP is not being robbed! It is just the FL trying to heat up the webcam on top of the roof to get rid of condensate inside the lens (Screenshot by colleague of Anna-Maria). Right: Both the DEP and the Swiss saw are now operational in the science trench.