Description
Chairs:
Professor Pavel Talalay and Professor Frank Wilhelms
Since 1975 about dozen of dry hole electromechanical (EM) ice coring drills were developed. Most of the drills were used in polar regions and a few in polar and high altitude glaciers ice coring operations. Main differences between ice coring operations in polar regions and in high altitude glaciers are: logistics, air and ice temperatures, particles concentration in ice and physical...
High production rate ice coring systems allow for fast ice sampling in intermediate depths. Several ice coring operations in Greenland and Antarctica ice sheets and in high altitude glaciers demonstrate ability of the dry hole electromechanical (EM) ice coring drills rich depth of a few hundred meters in a short time. The highest average production drilling rate (aPDR) of 4.79 m/h in 310 m...
The electronics of the JARE deep drill was previously manufactured through outsourcing and its basic design has already spent quarter century. The electronics of the drill should be installed in the pressure chamber. This implies that size of the electronics is restricted as smaller and difficult to manufacture. Therefore, it needs to be customized by incorporating and the required...
Data communication between the surface and the drill computer is necessary for deep ice core drilling. The contact force, inclination, and temperature of the drill are important for the drilling operation. These values were measured using the sensors in the drill and transmitted to the surface computer through the winch cable. The winch cable, which is 3000 m or more in length for enabling the...
The upcoming deep ice-coring project Beyond EPICA Oldest Ice (BE-OI) in Antarctica requires a robust and capable electrical drive-chain. The design goal was to increase the useable mechanical power of the drill motor as well as the data transfer between the surface and the downhole section by keeping the system as compatible as possible to existing dill systems.
The system consists of a...
For the recovery and reuse of drilling fluid from the chips produced in ice core drilling a melting procedure has been introduced at the EGRIP, RECAP, and ABN projects. The aim is to maximize the efficiency of drill fluid recovery through complete separation of the drilling fluid from liquid water, which would be an improvement over traditional methods relying on centrifugal force for fluid...
Accurate and reliable near-surface temperature is a critical input factor in ice model for assessing the mass and energy balance of polar ice sheet. Using a 10m temperature chain installed at Taishan station during the 2015/2016 Chinese Antarctic Research Expedition, a vertical profile of the high-precision near-surface snow temperature spaced at 0.1 m was obtained. The temperature dataset is...
