Antarctica Photo Library

Find All Keywords
Find the Exact Phrase
Find Any Keywords
Exclude Keywords
Date Range	to
Search In
Order By

Sort:

Date Taken:

December 28, 2015

Photograph By:

Elaine Hood

License Type:

Public Domain

Scientist Howard Conway, University of Washington, points to annual layers of snow accumulation in a snow pit located near the South Pole. The strata lines are similar to tree rings in that each year's snowfall can be clearly viewed. Ice cores extracted from deep within the ice contain atmospheric gases from hundreds of thousands of years ago. These gases provide an accurate record of what the earth's atmosphere was like in the past.

Associated Keywords

Atmosphere, Gasses, Ice, Ice Drilling, NSF, Person, Public Domain, Research, Science, Scientist, Snow, Snow Pit, South Pole

By downloading this image, you agree to be bound by the terms and conditions of the image license.

This photo is in the public domain.

Photos whose copyright has expired or were taken by government employees as part of their job duties are considered to be in the public domain. Public domain works are not subject to copyright laws. Anyone may download these photos and use them freely, even for commercial purposes.

Attribution is not legally required for public domain photos but is strongly recommended.

This photo is covered by a Creative Commons license. Please see the Usage and Submissions page for more information. Use of this photo requires the following:

(1.) The user must give appropriate credit to the photographer and the National Science Foundation (NSF) and provide a link to the Creative Commons license. (2.) Use of the photo must be for non-commercial purposes only. (3.) No derivative works may be made with the original photo without the explicit permission of the photographer.

For USAP Participants

For The Public

For Researchers and Educators

Contact Us

Contact USAP

Quick Links

Help