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You can use this page to browse through all of the individual visualizations that have been cataloged in our digital library. You can also browse them as collections related to particular topics.


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Detecting El Niño in Sea Surface Temperature Data
SST anomalies for December 1997 displayed in My World GIS™. Red indicates above average temperatures compared to average SST temperatures for December data averaged over the years 1982-1998. This chapter introduces you to normal seasonal sea surface temperature (SST) variation as well as extreme variation, as in the case of El Niño and La Niña events, in the equatorial Pacific Ocean. You will learn how to download seasonal SST data from the Pacific Marine Environmental Laboratory (PMEL), via a THREDDS server, for the years 1982 to 1998. With My World GIS, you will visualize and analyze that data, looking for the tell-tale SST signature of El Niño and La Niña events that occurred during that time period. At the conclusion of the chapter, you will be given the opportunity to analyze a season of your own choosing to determine if an El Niño and La Niña SST pattern emerged in that year's data.

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Earth From Space: Earth's Water Habitats

This search engine allows users to search a database of NASA satellite images of all Earth's water habitats including everything from oceans to ice. Users may select water habitats from a list and set search output parameters to show results as thumbnails, graphically intense images or text only. Due to the abundance of images in the database, searches may take a moment.

NOAA East African Coast Tsunami Animation

This NOAA visualization tracks the tsunami waves until they reach the East African coast of Somalia. This Quicktime animation can be paused, rewound and advanced.

The Physics of Tsunamis

This site from the University of Washington includes a Quicktime movie that shows the propagation of the earthquake-generated 1960 Chilean tsunami across the Pacific Ocean. The page also describes the physics of tsunamis through several exploration questions.

Indian Ocean Tsunami Quicktime Animation

This Quicktime animation, by Dr. Steven Ward at the Institute of Geophysics and Planetary Physics at the University of California - Santa Cruz, shows the tsunami's progress across the Indian Ocean. It also shows some water level graphs and wave run-up heights throughout the region.

Soils of the World

This site features a global map showing the major occurrences of the seven different soil orders of the world; alfisols, ultisols, mollisols, spodosols, vertisols, oxisols, and aridisols. Users can observe how the soil orders are correlated with global climate zones. Clicking on each soil order in the map legend yields a photograph of an example soil profile for that order.

Soil Texture and Classification

This interactive site from North Carolina State University shows the kinds of soils developed from different silt, sand, and clay content levels. A ternary diagram shows the range of soil textures based on percentages of each component. The site also provides an example of how to determine the soil texture of a sample composition. Students are also able to enter the percent composition of sand, silt, and clay and predict the soil texture classification themselves.

Natural Hazards: Floods

This site contains an interactive map of recent worldwide flood events. Clicking on the icons on the map will display satellite imagery and a detailed description of the flood events. Information in each description includes time and date of the event(s) as well as cause and effects of the event(s). Users may also choose to follow hotlinks to the detailed flood event information. This site is part of NASA's Earth Observatory, Natural Hazards division.

Dynamics of Steady-State Drainage Basins: An Experimental Approach

This site contains animations and data of erosion on a small scale and numerical landscape erosion models. Erosion on small scale models were developed in an erosion facility that allows a miniature landscape to erode through several relief distances at constant base level fall and rainfall rates. Numerical landscape erosion animations are modified from published models with changes to numerical lattice boundaries such as stream curvatures, hillslope failure and directional diffusion. Tables and diagrams provide spatial and temporal statistics of experimental landscapes. Also available on this website are PDF versions of Les Hasbargen's publications and presentations.

Animations of Glacial Processes

This site features four Flash animations of glacial processes. Topics include glacier basics, ice flow in a glacier, cross-section of an ice sheet, and crevasse formation. Each short animation includes captions and diagrams which define terminology and explain the processes depicted.

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