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Ask students to watch the animation and ask them to try to pick out periods of time where ice loss was the greatest.
Animated images could be paused for discussion.
Note the difference between land-based ice sheets, which do elevate sea level when they melt, vs. ocean-based ice packs, which do not raise sea level when they melt.
Two visualizations and an animation show how Arctic sea ice has been growing and shrinking, spinning, melting in place, and drifting out of the Arctic for the past three decades.
NASA scientists explain the dynamics of ice melting in the Arctic and review the sources of data that were used to create the visualizations.
Of note - this is one of the few resources showing sea ice thickness in addition to extent.
Provides a description of why understanding the two main types of Arctic ice matters: old (more than 4 years old) ice vs. new (younger than 4 years old) ice are good indicators of overall ice pack reduction trends.
Comments from expert scientist:
Scientific strengths:
- Great visualizations and tools
- Clear numbers that really illustrate how significant the loss of ice is
- Use of quotes is powerful
- Links to more information
Suggestion:
- Optional, but could briefly explain how ice is dated (or provide another link)
Text is small and somewhat difficult to read.
Visualization and animations are clear and easy to interpret.
The text is a little vocabulary-heavy and is not appropriate for middle school students.
Images and text are as they stand - no instructions for classroom use.
Easy for students to use but may not be so easy to follow the text.
High quality animation and graphics, including an interactive sliding 'before and after' window that allows focused study of specific polar areas.
