Law Dome Deep Ice Core Drilling Plan and Analysis

ANARE Research Notes 76 details a scientific plan to extract a 1240-meter ice core from Law Dome, Antarctica, across three summer seasons. The Australian Antarctic Division authored this report, outlining intended measurements from the core including isotope ratios, gas composition, and crystal structure. The document was published in 1992, describing a drilling program initiated in 1989.

Use Cases

• Analyzing oxygen and hydrogen isotope ratios to reconstruct past temperature records.
• Studying gas composition and total gas content for insights into historical atmospheric greenhouse gas concentrations.
• Examining trace chemical and particulate content to investigate past volcanic activity and aerosol deposition.
• Using solid DC-conductivity and density measurements to infer past accumulation rates and ice sheet dynamics.
• Counting annual layers in the ice core to establish an age-depth scale for climatic events over the last 50,000 years.

Strengths

• Plan targets a 1240-meter ice core, enabling climate reconstruction over an expected 50,000-year timescale.
• High snow accumulation rate of 530 kg m^-2 a^-1 at the site provides excellent temporal resolution for gas studies.
• Report outlines a detailed analysis plan covering over 10 specific measurement types, including isotopes, conductivity, and crystal structure.

Limitations

• Dataset is a planning document from 1992; the actual measurement data from the core is not included.
• Specific sample counts, row numbers, and final data formats for the proposed analyses are not provided.
• The temporal coverage and completion status of the proposed drilling and analysis program are not detailed in this metadata.

Provenance

Source

Australian Antarctic Division (AU_AADC), documented in ANARE Research Notes 76.

Collection Method

Scientific plan for deep ice drilling and core analysis, based on previous program experience.

Time Range

Drilling program planned for 1989-1992; document published in 1992.

Geography

Law Dome summit, Antarctica.