This video segment adapted from NOVA explains why ice sheets move. To find out how fast they move, scientists carve a tunnel through a glacier.
Changes in Glacier Bays Brady Glacier from 1973 to 1986
Changes in Glacier Bays Burroughs Glacier from 1973 to 1986
Changes in Glacier Bays Carroll and Cushing Glaciers from 1973 to 1986
Changes in Glacier Bays Casement Glacier from 1973 to 1986
An extended flying tour of Glacier Bay
Flying up Glacier Bays Muir Inlet, ending at the Muir Glacier
Zooming in from a full image of Glacier Bay to a closeup of the Muir Glacier
Changes in Glacier Bays Grand Pacific Glacier from 1973 to 1986
Changes in Glacier Bays Johns Hopkins Glacier from 1973 to 1986
Changes in Glacier Bays Margerie Glacier from 1973 to 1986
Changes in Glacier Bays Muir Glacier from 1973 to 1986
Changes in Glacier Bays Reid and Lamplugh Glaciers from 1973 to 1986
Changes in Glacier Bays Rendu Glacier from 1973 to 1986
Changes in Glacier Bays Riggs and McBride Glaciers from 1973 to 1986
This lesson introduces and describes the main types of erosion (i.e., chemical, water, wind, glacier and temperature). Students learn examples of each type of erosion and discuss how erosion changes the surface of the Earth. Students also learn why engineers need to be aware of the different types of erosion in order to protect structures and landmarks from the damaging effects erosion can cause. Figure 1 is an excellent illustration of water erosion.
This video contains a mix of live action video, stills, and computer animations of the Glacier Bay National Park in Glacier Bay, Alaska. Satellite mapping and imagery are used to show changes in the Glacier Bay area over a period of several years. Specific image processing techniques are discussed in relation to determining the evolution of glacier terminus points and in obtaining elevation data and how it is used to create fly-by visualizations of the area.
This hands-on activity explores five different forms of erosion (chemical, water, wind, glacier and temperature). Students rotate through stations and model each type of erosion on rocks, soils and minerals. The students record their observations and discuss the effects of erosion on the Earth's landscape. Students learn about how engineers are involved in the protection of landscapes and structures from erosion. Math problems are included to help students think about the effects of erosion in real-world scenarios.
This animation shows the ice concentration in Greenland. The ice has decreased significantly (~50 cm-year) along the coast and increased slightly in the center (+2 cm-year). Researchers view this as yet another serious warning sign of the threat of global warming.
Top-down view of Greenland Island tour. This animation shows the ice concentration in Greenland. The ice has decreased significantly (~50 cm-year) along the coast and increased slightly in the center (+2 cm-year). Researchers view this as yet another serious warning sign of the threat of global warming.
