Users download and analyze satellite images showing the amount of ozone in the stratosphere. They interpret the images to identify the ozone "hole" that develops over Antarctica each summer, and compare its size from year to year. Using freely available image analysis software, ImageJ, users quantify the area of the Antarctic ozone hole each October from 1996 to 2004. Finally, they bring their measurements ... Full description.

Visitors can access an alphabetic index to a large variety of fresh water-related materials on water quality, usage, laws and regulations, flooding, and ecosystems. Information resources include educational materials and a "Teachers' Corner" with booklets, activities, and fact sheets are available for teachers and are ranked according to educational level. This site is sponsored by Environment Canada, ... Full description.

This is a web-based activity using satellite images of the Gulf of Maine and the Carribean Sea. Students are asked to examine satellite data of sea surface temperatures. From this data they are to determine the temperature scale and how temperature differences are indicated. They also examine phytoplankton density images to determine where high phytoplankton densities are. Additional activities are ... Full description.

This module provides background information on El Nino and the mechanisms of the Southern Oscillation. Relationships of El Nino to climate change, weather phenomena and disease carrying organizms are also presented. Full description.

This site presents average ice conditions estimated using satellite passive microwave data for the most recent month available, as well as snapshots of trends and anomalies that compare these recent conditions with the mean for the month. Full description.

The world's food production depends on the availability of water, a precious but finite resource. Users can learn about the need for more efficient usage of water for irrigation, and about the activities of the Water Resources Development and Management Service, which is concerned with sustainable use and conservation of water in agriculture. Links to other sites related to irrigation practices and ... Full description.

Visitors can study this account of the calving of the Larsen ice shelf and the disintegration of the ice shelf around James Ross Island that occured in Austral Summer of 1994-95. The account is in chronolgical order and is accompanied by photographs. Follow-up examinations from 1996-2002 and links to related material are provided. Full description.

In this lesson, students explore the use of storm-tracking technologies, research how natural disasters are predicted, and assess the importance of these technologies. A case study of a New England snow storm and its impacts is presented for discussion, along with suggestions for retrieving information about forecasts as well as links to weather prediction and warning sites. Full description.

In this lesson, students learn about the limitations of weather forecasting and how consumer-driven weather forecasting companies attempt to meet the demand for accurate, long-term weather forecasting. The students then act as meteorologists, researching the weather patterns occurring in specific regions of the world and developing their own weather forecasts. Objectives, a materials list, procedures, ... Full description.

Users download and analyze MODIS imagery from 2001 and 2003 to quantify the shrinking of the Aral Sea. The chapter steps users through downloading, installing, and measuring with ImageJ, a freely available image analysis program. Users employ the software to set the spatial calibration of an image, then select and measure distances directly from the image. Measurement results are reported in real-world ... Full description.