Preprints
https://doi.org/10.5194/egusphere-2024-372
https://doi.org/10.5194/egusphere-2024-372
18 Mar 2024
 | 18 Mar 2024
Status: this preprint is open for discussion.

Brief communication: RADIX (Rapid Access Drilling and Ice eXtraction) dust logger test in the EastGRIP hole

Jakob Schwander, Thomas Franziskus Stocker, Remo Walther, Samuel Marending, Tobias Erhardt, Chantal Zeppenfeld, and Jürg Jost

Abstract. The RADIX (Rapid Access Drilling and Ice eXtraction) optical dust logger is part of the exploratory drilling system developed at the University of Bern. It was previously untested because no RADIX borehole reached to the depth of the required bubble-free ice. In June 2023, we tested the logger with an adapter for the large EastGRIP (East Greenland Ice-core Project) deep borehole. An excellent dust record was obtained for the Bølling-Allerød-Younger Dryas-Early Holocene period. The light scattered by the dust in the ice around the borehole was slightly higher than the detection range of the logger, requiring a reduction in the sensitivity for future deployments.

Jakob Schwander, Thomas Franziskus Stocker, Remo Walther, Samuel Marending, Tobias Erhardt, Chantal Zeppenfeld, and Jürg Jost

Status: open (until 11 May 2024)

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Jakob Schwander, Thomas Franziskus Stocker, Remo Walther, Samuel Marending, Tobias Erhardt, Chantal Zeppenfeld, and Jürg Jost
Jakob Schwander, Thomas Franziskus Stocker, Remo Walther, Samuel Marending, Tobias Erhardt, Chantal Zeppenfeld, and Jürg Jost

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Short summary
The RADIX optical dust logger is part of the exploratory 20-mm drilling system of the University of Bern. The logger is inserted into the borehole after drilling. The temperature, inclination and compass sensors were successfully tested, but not the dust sensor, because no RADIX hole reached down to the required bubble-free ice. In June 2023, we tested the logger with an adapter for the large East GRIP deep borehole. An excellent dust record was obtained for the Late Glacial/Holocene.