An ice core is a cylindrical sample of a rocky object consisting mostly of water ice.As shown in the image at the right, the long axis is in the direction of the coring into the object from its outer surface.It's minus 23.3 degrees Celsius (minus 10 degrees Fahrenheit) inside, so everyone is bundled up in ski parkas, insulated gloves and boots.And, saws are buzzing, as scientists from all over the U. are measuring and cutting pieces of precious Antarctic glacier ice to take back to their labs for research.
Research teams from the United States, the Soviet Union, Denmark, and France have bored holes over a mile deep into the ice near the poles and removed samples for analysis in their laboratories.
Aside from the fascination with salvaging several vintage aircraft for parts and movie rights, the fact that these aircraft were buried so deeply in such a short time focuses attention on the time scales used to estimate the chronologies of ice.
If the aircraft were buried under about 250 feet of ice and snow in about 50 years, this means the ice sheet has been accumulating at an average rate of five feet per year.
The fluid, or mixture of fluids, must simultaneously satisfy criteria for density, low viscosity, frost resistance, as well as workplace safety and environmental compliance over both the short term (e.g., fire hazard and acute toxicity) and long term (chronic toxicity, local and global environmental degradation).
The fluid must also satisfy other criteria, for example those stemming from the analytical methods employed on the ice core." "A number of different fluids and fluid combinations have been tried in the past.