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 NiÃo in Sea Surface Temperature Data
SST anomalies for December 1997 displayed in My World GISâ. 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 NiÃo and La NiÃa 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 NiÃo and La NiÃa 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 NiÃo and La NiÃa SST pattern emerged in that year's data.
Weathering - Part I
This site features 27 different photographs of physical, mechanical, and chemical weathering of outcrops and man-made structures.
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.
River Terraces below the 1959 Madison 'Slide
This site describes the formation of river terraces as a consequence of the 1959 Hebgen Lake, Montana earthquake and subsequent Madison slide. The report includes data, photographs, and graphs (some are animated) related to sediment loading and terrace formation below the Madison slide.
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.
Seismic Simulations Homepage: Seismic Data
This site describes an experiment at Duke University's Division of Earth and Ocean Sciences which examines how much of the rock record is retained in seismic reflection data. Experimental strata formed in a laboratory basin model simulate natural strata formation and digital images generate synthetic seismic data. These synthetic data are compared to the digital images of the experimental strata to assess the amount of stratigraphic information preserved in the modeled seismic data.
Stream Deposition Patterns
This Flash animation reveals deposition patterns associated with a river flowing into a lake. The animation shows a cross-section of stream flow as it enters a lake, with decreasing velocity reducing the water's ability to carry sediments in suspension. The conditions create a predictable pattern of deposition with the largest sediments deposited near the shore and smaller sediments settling farther out where the water is calmer. The animation may be played, paused, forwarded, and rewound manually.
This Flash animation from Michigan Tech drapes a watershed boundary upon a mountainous landscape and then shows how, after rainfall, surface runoff is funneled into a hierarchical drainage net. The animation shows how the watershed's trunk stream leaves the confines of the basin to drain adjacent watersheds.
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.
2004 Sumatra Earthquake
This visualization from Kenji Satake at the Active Fault Research Center in Tsukuba, Japan, highlights the crests and troughs of the tsunami waves as they travel across the Indian Ocean and refract around islands. Also featured is the manner in which the waves and interfere with each other. The red color means that the water surface is higher than normal, while the blue means lower. This animation runs continually.