Assessing the influence of Alaska glaciers is slippery work

May 27, 2011

With an estimated 34,000 square miles of ice, an area about the size of Maine, Alaska's multitude of glaciers have a global impact.

Anthony Arendt, an assistant research professor at the University of Alaska Fairbanks Geophysical Institute, has outlined the complexity and influence of Alaska glaciers in this week's issue of the journal Science. In his article, Arendt explains the importance of integrating field observations and more precise glacier simulation models.

"We have used satellites to measure the mass changes of all of Alaska's glaciers, but there are also many glaciers that need to be measured in the field," Arendt said. "We need these field observations to better understand the processes that are controlling glacier changes."

Glacial patterns are difficult to predict — even for current computer models. Alaska glaciers often behave independently of one another. They retreat and surge, and are subject to volcanic and oceanic influences, in addition to changes in precipitation and warming temperatures. Data collected in the field will help refine existing models, so that a more accurate picture of changing can be drawn.

"Alaska glaciers have been losing mass more rapidly since the mid-1990s than they were several decades earlier," Arendt states in the article. "Understanding whether this trend continues will require an integration of observations across disciplines, as well as the development of robust glacier simulation models."

According to Arendt, glaciers and ice caps make up a mere three percent of the ice on our planet, yet they account for about half of the sea level contribution. These dynamic chunks of ice are tremendously influential on future coastlines.

"There are many people living very close to the sea in areas where even a small change in sea level would be devastating," Arendt said. "Developing countries don't have the resources to deal with this change."

To create the best sea level forecasts, Arendt said that scientists need to use to fill data gaps in current models. With thousands of in , scientists have much more work to do, he said, noting that the research will ultimately help the global community better adapt to sea level change.

Explore further: Scientists may be cracking mystery of big 1872 earthquake

More information: www.sciencemag.org/content/332/6033/1044.full

Related Stories

Scientists expect increased melting of mountain glaciers

Jan 20, 2006

Sea level rise due to increased melting of mountain glaciers and polar ice caps will be much lower in the 21st Century than previously estimated. However, decay of mountain glaciers in due to global warming will be much more ...

Warming oceans threaten Antarctic glaciers

Mar 15, 2007

Scientists have identified four Antarctic glaciers that pose a threat to future sea levels using satellite observations, according to a study published in the journal Science.

Recommended for you

Bridgmanite: World's most abundant mineral finally named

2 hours ago

A team of geologists in the U.S. has finally found an analyzable sample of the most abundant mineral in the world allowing them to give it a name: bridgmanite. In their paper published in the journal Science, the te ...

Volcano in south Japan erupts, disrupting flights

9 hours ago

A volcano in southern Japan is blasting out chunks of magma in the first such eruption in 22 years, causing flight cancellations and prompting warnings to stay away from its crater.

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.