Arctic Tundra May Contribute to Warmer World

In this audio slideshow, an ecologist from the University of Florida describes the radiocarbon dating technique that scientists use to determine the amount of carbon within the permafrost of the Arctic tundra. Understanding the rate of carbon released as permafrost thaws is necessary to understand how this positive feedback mechanism is contributing to climate change that may further increase global surface temperatures.

Go To:

http://www.nsf.gov/news/news_images.jsp?cntn_id=114865&org=NSF

University of Florida

National Science Foundation

Notes From Our Reviewers

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Teaching Tips

Appropriate for environmental science biology or Earth science courses, grades 6 - 14.

Supporting materials more appropriate for upper high school and undergrad students.

The pieces provide rich materials for an in-depth unit of curriculum on carbon balance, which may include the Nature paper.

Illustrations can be made larger and downloaded or used as handouts.

Younger students could be encouraged to create a concept map illustrating the mechanisms, inputs, and outputs of this carbon cycle and how it contributes to climate change naturally.

About the Science

A review of Arctic ecologist Ted Schuur's research using radiocarbon dating to track current metabolism of old carbon in an area where permafrost thaw is increasing.

Comments from expert scientist: The study is based on the direct measurements of carbon using instruments and thus provides direct evidence of terrestrial carbon release following permafrost thaw.

About the Pedagogy

Accompanying the slideshow are two video clips and a wonderful background article along with two visual illustrations depicting the carbon cycle and changes in the carbon balance over time. All provide ample scaffolding.

Technical Details

Slideshow is excellent with beautiful photographs.

The inability to download the video encourages watching it on an individual laptop or projected onto a screen for larger audiences.

The accompanying pieces complement its effectiveness and ease of use.