Conveners
SPICEcore physical properties, hole lifetime and logging
- Tun Jan Young ( University of Cambridge)
In 2013 the dust logger was equipped with a precision orientation sensor to study ice anisotropies. This sensor can be used to monitor SPICE borehole deformation by comparing data taken over multiple seasons between 2015 and 2019. We will also re-examine data from inclinometers installed in the IceCube array in order to develop a fuller picture of ice flow at South Pole.
An acoustic televiewer, which collects tilt, azimuth, and
high-resolution caliper measurements, was deployed to measure the 3D shape of the 1751m SPIceCore Borehole in December 2019. We will present the results of this data collection including analysis of borehole shape and inclination, evidence of drilling artifacts on
the borehole wall, and lessons learned for optimal data collection...
Analyses of the physical properties of the 1751-meter long South Pole ice core (SPC14) have been carried out on 82 vertically-oriented samples cut from the core below the firn-ice transition on a 20-meter sampling interval. Analyses include bubble-number density, grain orientation and fabric, grain-size distributions, and grain-shape characteristics derived from the grain statistics.
We...
Microparticle measurements from Antarctic ice cores provide valuable information on past climate dynamics (e.g., atmospheric circulation, dust source area conditions) and ice physical properties. Microparticle concentration and size distributions can be measured using coulter counter techniques on discrete samples, and/or high-resolution laser-based (Abakus) particle counters paired with...
