Ten years of icy data show the flow of heat from the arctic seafloor

phys.org | 9/20/2018 | Staff
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Scientists have taken the temperature of a huge expanse of seafloor in the Arctic Ocean in new research by the U.S. Geological Survey and the Geological Survey of Canada. The study, published in the Journal of Geophysical Research, is accompanied by the release of a large marine heat flow dataset collected by the USGS from an ice island drifting in the Arctic Ocean between 1963 and 1973. These never-before-published data greatly expand the number of marine heat flow measurements in the high Arctic Ocean.

Marine heat flow data use temperatures in near-seafloor sediments as an indication of how hot Earth's outer layer is. These data can be used to test plate tectonic theories, provide information on oil and gas reservoirs, determine the structure of rock layers and infer fluid circulation patterns through fractures in those rock layers.

Body - Work - Fact - Years - Contribution

"This body of work and the fact that it remains relevant so many years later underscores the enduring contribution that USGS researchers have made to understanding even the most remote corners of the planet," said USGS associate director for natural hazards, David Applegate. "As focus on the Arctic region continues to increase, I look forward to seeing how scientists at the USGS and other institutions build on this valuable research."

Starting in 1963, now-retired USGS scientist Arthur Lachenbruch and his team of researchers conducted 356 marine heat flow measurements and acquired more than 500 seafloor sediment samples while working from a hut installed on Fletcher's Ice Island, a 30-square-mile ice floe also known as T-3. These Arctic Ocean heat flow measurements taken by the USGS over the course of 10 years represent far more than the number available for the U.S. Atlantic margin.

Release - T-3 - Legacy - Heat - Flow

When asked about the release of the T-3 legacy heat flow dataset, Lachenbruch commented, "I am pleased to see the T-3 heat flow results...
(Excerpt) Read more at: phys.org
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