Newswise — The National Science Foundation's $12.9 million Antarctic research grant will fund a consortium of five U.S. universities headed by the University of Nebraska-Lincoln and Northern Illinois University in DeKalb. The project is an ambitious international effort to probe deeper than ever before into geological strata buried beneath the frozen sea in order to help scientists better understand contemporary global warming trends.

Dubbed ANDRILL, which is short for ANtarctic geological DRILLing, the project will be a focal point during International Polar Year (2007-09), a worldwide campaign of polar education and analyses.

Other members of the U.S. consortium making up the American half of the ANDRILL program are Florida State University in Tallahassee, Ohio State University in Columbus and the University of Massachusetts in Amherst. The international half of the venture will include scientists from New Zealand, Italy and Germany.

The NSF grant, to be dispersed over five years, will be administered by the ANDRILL Science Management Office, headquartered at UNL. In all, ANDRILL is backed by more than $30 million in funding, including $9.7 million in previous and on-going national agreements to support operations and nearly $8 million from the other countries to support scientific research.

In October and November of 2006 and 2007, ANDRILL scientists will use a powerful new drilling system partially owned by UNL and NIU to recover rock cores from the seabed in the McMurdo Sound area of the Ross Sea, using floating ice as a drilling platform. By studying the cores, scientists in Antarctica and around the world will be able to develop a detailed history of the Antarctic climate and the expansion and contraction of the area's ice sheets over the past 20 million years.

"Drilling for a sedimentary history of climate change adjacent to the Earth's largest ice sheet will reveal a lot about how the Antarctic region responded in the past, and may respond in the future, to climate perturbations like global warming," said UNL micropaleontologist David Harwood, director of the ANDRILL Science Management Office. "A team of 100 international scientists will work to establish how fast, how frequent, and how large were the past changes in the Antarctic ice sheet. The past will reveal much about the future and Antarctica's role in the global climate machine, which affects all of us."

"The Antarctic is like a global thermostat," added NIU geologist Ross Powell, who serves as a co-chief scientist for ANDRILL and fellow U.S. co-leader with Harwood. "The region is showing it can be extremely sensitive to climate change with the massive ice sheet interacting with the world's atmosphere and oceans to help maintain the world's current temperature distribution. When global temperatures warm past critical thresholds, the ice sheet melts, accelerating the warming effect. When global temperatures cool, the ice sheet expands, accelerating the cooling effect.

ANDRILL's Science Management Office opened at UNL in 2002, soon after the completion of its predecessor, the Cape Roberts Project (1995-2000) in the western Ross Sea region. Also in 2002, Harwood and Powell secured a $1 million Major Research Initiative grant from NSF to help build the drilling system. Nearing completion in Christchurch, New Zealand, the system will be tested this fall in New Zealand.

With the NSF grant in hand, scientists involved in ANDRILL are reviewing proposals made by scientists from across the United States. They will award sub-grants to some 40 scientists (20 in each of the two drilling seasons), half of whom will work in Antarctica on the ice and at McMurdo Station. The other half will work in their laboratories at their home institutions.

The program will proceed in three stages. Seismic surveys to determine the best drilling sites will be completed in October and November. In 2006, a team led by Powell and Tim Naish of the Institute of Geological and Nuclear Sciences in New Zealand, will drill from the McMurdo Ice Shelf south of Ross Island. In the second drilling season, a team led by Harwood and Fabio Florindo of Italy's National Institute of Geophysics and Volcanology will drill from a site west of Ross Island.

Scientists selected the McMurdo Sound region for the project because the area provides access to a full range of geologic activity -- sedimentary deposits left by glaciers; igneous deposits created by extensive volcanic activity in the area, including the 12,450-foot Mount Erebus volcano on Ross Island; and tectonic shifts that elevated the nearby Transantarctic Mountains.

ANDRILL's drilling system, developed and operated by Antarctica New Zealand, will enable the program to drill in much deeper water than earlier projects allowed. The drill is designed to punch through about 275 meters of ice, drop through 900 meters of water to the sea floor, and pull a continuous 1,000-meter-long sediment core at each drilling site.

The core samples will first be examined by scientists at McMurdo Station and then stored at Florida State University's Antarctic Research Facility in Tallahassee, where they will be available for the thorough, ongoing studies that will give scientists a much clearer picture of Antarctica's recent climate history.

In addition to its extensive science and operations aspects, ANDRILL also has a strong education and outreach component as six educators will work in Antarctica during each drilling season, learning how to incorporate the basic science of ANDRILL into their curricula and to share it with other teachers. Those 12 positions will also be determined in a competitive application procedure through the ANDRILL Science Management Office. The outreach will also extend to the general public through a planned television documentary produced in Antarctica and the United States by NET Nebraska, the Nebraska public television network.

But the core element of ANDRILL is scientific research and the knowledge it will produce.

"We don't have a good reference for the last 20 million years of time in Antarctica, and that's a time period that is critical to our understanding of how our Earth model works, but also to understanding what might happen in the future," Harwood said. "Drilling in deeper water than we have in the past will provide a much more complete record.

"Abrupt climate changes, which in scientific terms would occur over decades or less, could provide significant problems for humanity, impacting such things as agriculture, air quality, energy usage, the spread of disease and the viability of coastal communities," Powell added. "We are hoping we may recover sediments representing periods of time when such rapid changes have occurred in the past, and that's another reason why this research is so important. By looking at the Antarctic past, we're glimpsing the Earth's future."

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