enlarge Courtesy photo

UMaine Professor Paul Mayewski will appear in a CBS special at 7 p.m. Sunday.

But the very bottom of the Earth is by no means the most remote place on the planet.

Ask Paul Mayewski. The University of Maine professor has earned a global reputation, for himself and the school, by going to some very cold and isolated places and coming home with discoveries about the planet and its atmosphere.

"There are plenty of places on Earth where we were the first team to ever go there," Mayewski said. "You get the chance to be on the forefront of adventure exploration, and also scientific exploration, by doing this stuff."

The director of UMaine's Climate Change Institute spoke this week during a brief break in Orono between his latest Antarctic expedition and a global gathering of scientists in England.

Mayewski is studying the planet's environment as it existed anywhere from 200 to 100,000 years ago. Over the past 40 years of adventures, Mayewski has pioneered the use of ice cores drilled from ancient glaciers to determine what the climate and the environment were like around the world long before there were thermometers.

"The ice cores are like buried meteorological stations and buried atmospheric stations. They give you so much information about the environment," he said.

Mayewski and the Orono-based institute were the first to raise evidence of abrupt climate changes from deep in the Earth's historical record, a finding that influences climate science worldwide.

There's a mountain named after him in Antarctica. He received the Explorers Club Citation of Merit in 1995 and the Scientific Committee on Antarctic Research Medal for Excellence in Antarctic Research in 2006.

Mayewski also is known for his charisma, in a lecture hall or in front of a TV camera. He has been featured in two climate- change segments on the CBS news show "60 Minutes," once in Antarctica and once in the Arctic.

Both segments will be broadcast at 7 p.m. Sunday, during a CBS special called "The Age of Warming."

Mayewski came to the university in 2000, and his appointment attracted several other adventurer scientists, including Gordon Hamilton, a glaciologist who was on the recent Antarctic expedition.

"He's well-known both in the U.S. program and across the world," Hamilton said.

So is the University of Maine's institute, which has been sending researchers to Antarctica for decades. The work is funded by federal grants, including from the National Science Foundation, and the research teams always include students.

"The University of Maine has sent more students and faculty to the Antarctic than just about any other university in the United States," Hamilton said.

Mayewski's travels and his readings of the ice cores have convinced him that the Earth is changing fast.

While there has been a lot of focus on the faster-than-expected melting of glaciers in Greenland -- something also documented by UMaine researchers -- Antarctica is often seen as unchangeable, mostly because it's so big and so cold.

It doesn't look that way to Mayewski, who has likely traversed more miles across the ice there than anyone, and who may be the only man to lead two expeditions to the South Pole from different sides of the frozen continent.

"The Antarctic has some of the most dramatic warming anywhere on the planet," he said. That has led to dramatic change along the coast, including huge icebergs that break away and fall into the Southern Ocean.

But Antarctica's vast interior is well above sea level, and cold. It was 13 to 50 degrees below zero during the recent expedition -- and it's summertime down there.

"You still have this giant ice cube that is able to maintain its own climate because of its sheer size," Mayewski said. "The question is, how long can those effects (of warming) be warded off by the sheer size of the Antarctic itself?"

The rate of ice melting at the poles and the projected rise in sea levels...