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Drilling holes in the ice for water sampling, Photo by J

Drilling holes in the ice for water sampling, Photo by J 2025

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The document titled 'Lake Chemistry and Physical Data For Selected North Slope, Alaska, Lakes: April 2007' presents findings from a study conducted by the University of Alaska Fairbanks and Geo-Watersheds Scientific. It details the physical and chemical characteristics of various lakes in North Slope, Alaska, focusing on data collected during field sampling in April 2007. The report includes methodologies for water quality sampling, results from snow depth measurements, and water chemistry analysis aimed at understanding hydrological conditions and supporting water resource management in the region.

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How is ice drilled?

The meltwater is heated to about 75C, pressurised, and pumped into the drill system. The drill is really a hose with a long heavy nozzle that sprays hot high-pressure water to bore a hole as its slowly lowered into the ice.

What is the process to obtain ice core samples?

The ice cores drilling technique In order to sample ice formed by the compression of successive layers of snow year after year, drilling operations make a vertical cut using a core drill, a steel tube attached to a power cable shaped like a screw and equipped with cutting blades.

How is ice drilled to recover samples?

Drillers can extract ice cores with either mechanical or thermal drills. Thermal drills are better suited to warmer conditions where it is possible to melt the ice surrounding the core.

How far down do the drills go to get an ice core?

Researchers drill ice cores from deep (sometimes more than a mile, or more than 1.6 kilometers) inside the polar ice sheets in Greenland and Antarctica, as well as some high-latitude ice caps and mountain glaciers.

What are they drilling for in Antarctica?

The team is using innovative drilling technology to extract rock cores from bedrock beneath the ice sheet, analysing cosmogenic isotopes that indicate when the rock was last exposed to the atmosphere.

What is the ice coring method?

Ice cores are collected by cutting around a cylinder of ice in a way that enables it to be brought to the surface. Early cores were often collected with hand augers and they are still used for short holes. A design for ice core augers was patented in 1932 and they have changed little since.

How old was the bottom of the ice core they were drilling?

Million year-old bubbles could solve ice age mystery. What is probably the worlds oldest ice, dating back 1.2m years ago, has been dug out from deep within Antarctica. Working at temperatures of -35C, a team of scientists extracted a 2.8km-long cyclinder, or core, of ice - longer than eight Eiffel Towers end-to-end.

Drilling holes in the ice for water sampling, Photo by J 2025

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