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Scientists succesfully sample subglacial lake |
| TheAllINeed.com/NC&T/UH/ |
The UH team included Associate Professor Eric Gaidos of the Department of Geology and Geophysics, Postdoctoral Fellow Brian Glazer (who will soon join the Department of Oceanography) and Mary Miller, a volunteer researcher. They were funded by the NASA Astrobiology Institute through its lead team at the University of Hawai'i's Institute for Astronomy.
The UH team, with their U.S. and Icelandic collaborators, will study the lake's temperature profile and the retrieved water sample to understand the lake's structure and chemistry, and to determine whether microbial life is present and thriving in its perennially dark, near-freezing waters.
"Science is well-acquainted with marine life that survives on seafloor volcanoes in the absence of sunlight, so I fully expect that a community of microorganisms exists somewhere in the lake, and perhaps in our water sample," said Gaidos.
The lake, buried under 300 meters of ice and maintained by the heat of an active volcano, was 100 meters deep at the sampling location. To access the lake, the team used a unique hot-water drilling system, designed and constructed by their Icelandic collaborators, that melts a hole a few centimeters across through the ice. The water used to drill the hole is filtered, treated by ultraviolet radiation and heated to high temperature to sterilize it to minimize any contamination of the lake. A lake sample was retrieved using a unique water and gas tight sampler designed and built by SOEST. "A harmless dye was added to the water within the drill hole and because the retried sample was colorless, this confirmed that it was indeed from the lake," explained Gaidos.
The expedition follows a similarly successful expedition to another, nearby subglacial lake in 2002, in which Gaidos was involved.
"As with any new field research, we faced some unexpected problems as well as the expected challenge of working on a glacier," said Gaidos. "But dedication of the entire team paid off. Not only will we have a few answers, but we now have more questions that make us eager to return."
The research team plan to return to the site to conduct further studies next summer.
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