Methodology

• Ice Core Drilling

  For the ice core drilling the PICO (Polar Ice Coring Office) Hand Auger has been used. Despite the loss of one drilling bit, the coring went smoothly with only minor problems. A few modifications have been carried out for safety and convenience.

• Borehole Temperature Measurement

  Coupled conductivity wire were used to read temperature. The meter displayed a high sensitivity to the air temperature and had to be keptabove 0°C.

• Snow Profiling and Sampling

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  A hand saw and in places a chain saw were used to cut the snow profiles. No modifications were necessary.

• Meteorological Measurements

  The weather station used was hired from NIWA. Since it had been employed in Antarctica before, no modifications were necessary.

• Differential GPS Measurements

  The GPS system used (Trimble X PRO) has been employed in Antarctica before so that no modifications were necessary. In order to derive differential data, the measurements have been linked with the data from the base station located at the Cape Roberts tide gauge.