Electrical conductivity measurement (ECM)...
Wednesday 19th June 2024
Electrical conductivity measurement (ECM)...
Drilling continued in the white tent with more than 10 m drilled today. The cores are on average a little longer than 1 m out of the maximum 2.2 m, as there is quite a lot of loose snow collected in each run. Ice-core measurements started at 10 m depth below the floor in the white tent. At this depth we believe to have passed the ‘Anthropogenic’ zone of our own camp contamination and entered pristine firn. The cores are still quite low density and brittle as we know it from the uppermost snow. The drill software is being modified as various issues show up during this testing phase. Just south of camp, Sepp and Kyra are measuring a temperature profile in the ‘Korean’ shallow bore hole S8 that was drilled in 2022. The temperature logger is descended 5 m per hour into the ~100 m deep hole. The borehole temperature adjusts to that of the adjacent firn, which in turn preserves the mean annual temperature. The temperature profile will thus reveal when global warming has arrived at EGRIP. In the afternoon, Knut’s team went to the ice stream shear zone some 17 km SW of camp with their radar. For dinner Anders KH prepared a delicious meal from an Icelandic lam that we got as a present from the GEUS team that visited us earlier this week. Thank you GEUS, please come back next year!
What we did today:
Weather today: Overcast all day and stable temperatures from -9°C to -6°C. Wind 3-10 kt from W.
FL, Anders Svensson
...and scraping of water isotopes from the core