Image:GISP2D1837 crop.jpg

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Cropped from en:Image:GISP2D1837.jpg. Cropped and uploaded by User:HereToHelp; original uploaded by en:User:Dragons flight; made by USGS. The documentation is reproduced here:

[edit] Description

This photograph shows a section of the GISP2 ice core from 1837-1838 meters in which annual layers are clearly visible. The appearance of layers results from differences in the size of snow crystals deposited in winter versus summer and resulting variations in the abundance and size of air bubbles trapped in the ice. Counting such layers has been used (in combination with other techniques) to reliably determine the age of the ice. This ice was formed ~16250 years ago during the final stages of the last ice age and approximately 38 years are represented here. By analyzing the ice and the gases trapped within, scientists are able to learn about past climate conditions.


Camera location

65°0′0″N, 43°36′0″W

This and other geocoded Commons images: (Info)

[edit] Copyright

This image was produced at the National Ice Core Laboratory by employees of the USGS with funding from the NSF, and consequently is in the public domain.

It was kindly provided by Eric Cravens, Assistant Curator, National Ice Core Laboratory.

Public domain This image is in the public domain because it contains materials that originally came from the United States Geological Survey, an agency of the United States Department of Interior. For more information, see the official USGS copyright policy

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeDimensionsUserComment
current15:31, 6 April 200716,229×1,807 (7.85 MB)HereToHelp (Cropped from en:Image:GISP2D1837.jpg. Cropped and uploaded by User:HereToHelp; original uploaded by en:User:Dragons flight; made by USGS. The documentation is reproduced here: ==Description== This photograph shows a section of the [[GISP2])