This concentrated, in-depth resource provides access to recent information on El Nino Southern Oscillation (ENSO) and La Nina in the Pacific Ocean, including data, graphics, forecasts, historical perspectives, in-depth analyses, prediction benefits, impacts on human life, and information on the 1997/1999 El Nino and La Nina events. Links to relevant data include Tropical Atmosphere Ocean Project (TAO) ... Full description.

This site provides two interactive exercises designed to help the user learn about river processes like discharge, flooding and flood frequency. Both exercises require the user to make observations and measurements, do simple calculations, and answer questions. Full description.

The Ocean World site has a wide variety of information regarding the ocean. Established by Texas A and M University's Jason Project, Ocean World provides a wealth of information on weather, forams, icebergs, fisheries, coral reefs, waves, El Nino, currents and more. The site contains information for both students and teachers. The teacher section of the site contains background information on all ... Full description.

This chapter describes how to set a scale and measure distances and areas on satellite images. Using ImageJ, a freely available image analysis program that runs on most operating systems, users set the spatial calibration of image, then select and measure distances and areas on the image. The measurement results are reported in real-world units. The technique is most useful and accurate for nadir ... Full description.

The National Weather Service provides weather and marine data from buoys surrounding North America, the Carribean, and Great Britain. Historical and realtime data are featured. Data include wind, waves, atmospheric pressure, air and water temperature, and dewpoint. Frequently Asked Questions explain how the marine stations collect and transmit data, how quality is assured, and how the National Data ... Full description.

This activity walks users through a technique for documenting change in before-and-after sets of satellite images. The technique can be used for any set of time-series images that are spatially registered to show the exact same area at the same scale. In the chapter, users examine three Landsat images of the Pearl River delta in southeastern China. In the images, users observe changes in land use ... Full description.

In this activity, users download and graph modeled climate data to explore variability in climate change. Most people know that climate changes are predicted over the next hundred years, but they may not be aware that these changes are likely to vary from region to region. Using data from the University of New Hampshire's Earth Science Information Partner, a digital library of Earth Science data, ... Full description.

This activity describes the technique of preparing latitude-longitude based data so that it can be imported into a geographic information system (GIS). The chapter describes the steps to create a map to display data and guides users through some basic geographic analyses. The focus of the chapter-s case study is earthquake prediction. Users download and format near real-time and historical earthquake ... Full description.

This report discusses how natural processes and human activities affect the interactions of ground water and surface water, and the importance of considering ground water and surface water as a single resource. Topics include natural processes of ground- and surface-water interaction; chemical interactions; and the effect of landscapes on these interactions. There is also discussion of the effects ... Full description.

Virtual Earthquake is an interactive web-based program designed to introduce the concepts of how an earthquake epicenter is located and how the Richter magnitude of an earthquake is determined. Virtual Earthquake shows the recordings of an earthquake's seismic waves detected by instruments far away from the earthquake. The instrument recording the seismic waves is called a seismograph and the recording ... Full description.