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Tree Rings: Counting the Years of Global Warming
http://www.youtube.com/watch?v=vqicp4PvHrY

Worksyn Productions

This video describes the role that dendrochronology plays in understanding climate change, especially changes to high elevation environments at an upper tree line. Dendrochronologists from the Big Sky Institute sample living and dead trees, describe how correlations between trees are made, and explain how tree cores record climate changes.

Video length: 7:53 min.

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Learn more about Teaching Climate Literacy and Energy Awareness»

Climate Literacy
About Teaching Climate Literacy

Individual organisms survive within specific ranges of temperature, precipitation, humidity, and sunlight. Organisms exposed to climate conditions outside their normal range must adapt or migrate, or they will perish.
About Teaching Principle 3
Other materials addressing 3a
Based on evidence from tree rings, other natural records, and scientific observations made around the world, Earth’s average temperature is now warmer than it has been for at least the past 1,300 years. Average temperatures have increased markedly in the past 50 years, especially in the North Polar Region.
About Teaching Principle 4
Other materials addressing 4e
Environmental observations are the foundation for understanding the climate system. From the bottom of the ocean to the surface of the Sun, instruments on weather stations, buoys, satellites, and other platforms collect climate data. To learn about past climates, scientists use natural records, such as tree rings, ice cores, and sedimentary layers. Historical observations, such as native knowledge and personal journals, also document past climate change.
About Teaching Principle 5
Other materials addressing 5b

Benchmarks for Science Literacy
Learn more about the Benchmarks

Scientific investigations usually involve the collection of relevant data, the use of logical reasoning, and the application of imagination in devising hypotheses and explanations to make sense of the collected data.
Explore the map of concepts related to this benchmark
The world contains a wide diversity of physical conditions, which creates a wide variety of environments: freshwater, marine, forest, desert, grassland, mountain, and others. In any particular environment, the growth and survival of organisms depend on the physical conditions
Explore the map of concepts related to this benchmark

Notes From Our Reviewers The CLEAN collection is hand-picked and rigorously reviewed for scientific accuracy and classroom effectiveness. Read what our review team had to say about this resource below or learn more about how CLEAN reviews teaching materials
Teaching Tips | Science | Pedagogy | Technical Details

Teaching Tips

  • This video could be used in a variety of curricula unit of study including climate, plants and forests, forest ecosystems, etc.
  • Because it shows a female lead researcher and male graduate students collecting in the field and bringing the cores back to the lab to analyze them, it allows students to go beyond just looking at paper copies of tree ring patterns.
  • Video can complement other CLEAN selected resources: http://cleanet.org/clean/educational_resources/index.html?search_text=tree+ring&Search=search

About the Science

  • Research opportunities found in tree rings that link trees in Yellowstone National park to the research community.
  • Global climate change and tree rings, which offer a record that humans are fundamentally changing the Earth system.
  • Comments from Expert Scientist: Tree ring research is low tech and easily approachable by educators and students at middle school through college levels.
  • This well-produced video enhances that approachability by featuring senior scientist Lisa Graumlich, one of the most articulate dendroclimatologists in the world.

About the Pedagogy

  • No supplemental materials, but can help demystify research process.

Technical Details/Ease of Use


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