Contact Us

UM Professor Shows Influence of Arctic Ice on Past Climate

icebergs
Icebergs. (iStockphoto.com)
Three million years ago, the concentration of sea ice in the Arctic greatly affected the land temperatures in the Pliocene era, according to new research by UM bioclimatology Assistant Professor Ashley Ballantyne.

According to a University of Montana news release, Ballantyne and coauthors used a global climate model to look at carbon dioxide concentrations, which recently reached 400 peers per million, similar to the Pliocene levels. However, at that time, according to the study in the July issue of Nature Geoscience, the Arctic surface temperatures were 15 to 20 degrees Celsius warmer than surface temperatures now.

The findings suggest that much of the surface warming was due to ice-free conditions in the Arctic. It also showed that sea ice could affect warming more than land-based ice.

Scientists have been measuring decreasing sea ice in the Arctic each year.

Ballantyne worked with his coauthors from Northwestern University, the University of Colorado and the National Center for Atmospheric Research. The full paper will be published in Palaeogeography, Palaeoecology: An International Journal for the Geosciences.

More from AM 1240 KLYQ

Best of the Web

Leave a Comment

It appears that you already have an account created within our VIP network of sites on . To keep your points and personal information safe, we need to verify that it's really you. To activate your account, please confirm your password. When you have confirmed your password, you will be able to log in through Facebook on both sites.

Forgot your password?

*Please note that your points, prizes and activities will not be shared between programs within our VIP network.

It appears that you already have an account on this site associated with . To connect your existing account with your Facebook account, just click on the account activation button below. You will maintain your existing profile and VIP program points. After you do this, you will be able to always log in to http://klyq.com using your Facebook account.

*Please note that your points, prizes and activities will not be shared between programs within our VIP network.

Please fill out the information below to help us provide you a better experience.

Register on AM 1240 KLYQ quickly by logging in with your Facebook account. It's just as secure, and no password to remember!

Not a Member? Sign Up Here

Register on AM 1240 KLYQ quickly by logging in with your Facebook account. It's just as secure, and no password to remember!