Why don't we know more about Lake Ellsworth? Because it's a frozen lake. Buried under two miles of ice. In Antarctica.

But Northumbria glaciologist Dr John Woodward, together with experts from the British Antarctic Survey and Edinburgh University, will spend five months working in sub zero conditions to unlock some of its secrets and discover what life may exist there.

More than 150 subglacial lakes have been identified in Antarctica, cut off from the outside world by thick caps of ice for tens or even hundreds of thousands of years. Any life forms will have had to adapt to complete darkness, very few nutrients, crushing water pressures and isolation from the atmosphere.

His group is not the only one on a mission to discover what lives in those frozen environs of the Antarctic.

"There is competition to be the first team to explore a subglacial lake," Woodward said. "A team from Italy would like to explore Lake Concordia and a team from Russia plans to extract water from Lake Vostok, the largest subglacial lake identified. It is vitally important to identify suitable drill sites, and then to plan to conduct the access experiments in an environmentally friendly way so as not to risk contaminating such pristine and isolated environments."

Their first task is to identify the optimal site from which to access the subglacial lake. Woodward will undertake a seismic survey, using high explosives to generate a controlled noise source. Sound waves from the explosive shot travel through the ice and are reflected from the ice-water interface (the surface of the lake). Some waves will travel through the water and will then be reflected from the water-bed interface. The echoes that return to the surface are recorded by a series of highly sensitive microphones that are attached to a computer that will allow the depth of the lake to be mapped.

Once the seismic survey has been carried out, the researchers hope to attract more funding to allow them to use a hot-water drill to bore through the ice and access the lake. A slimline robot will then be lowered into the depths, which will carry sensors to detect life and collect sediment samples.

Funding by the Natural Environment Research Council (NERC). The British Antarctic Survey will be providing the logistical support.

- Northumbria University