This article describes the global weather factors used by Colorado State University Professor William Gray to make predictions on the number and severity of storms that will occur in a hurricane season. Links to forecasts and to other weather-related topics are included. Full description.

This document provides an extensive description of a strategy to deliver credible predictions of future atmospheric carbon dioxide levels based on improved understanding of dynamics in the Earth's carbon reservoirs (the land, air and oceans). Full description.

Visitors to this site can read a discussion about the weather in Anarctica, including why it is so cold, how weather observations are conducted there, and what role the continent plays in the global weather system. Links to related topics, a wind chill calculator, and a Fahrenheit-Celsius-Kelvin temperature converter are also provided. Full description.

In the winter of 1999-2000, relatively little snow cover blanketed North America, and it melted early. Users can read and view satellite imagery that discusses how NASA's Terra satellite and its Moderate Resolution Imaging Spectrometer (MODIS) were able to record this phenomenon, and how spring snow cover data can be used to predict flood or drought conditions. Full description.

Desertification, the degradation of formerly productive land into desert, is a complex process. It involves multiple causes, and it proceeds at varying rates in different climates. This web page, produced by the U.S. Geological Survey, features text and photographs that explain what desertification is, how human activities may contribute to it, how satellite imagery is used for monitoring vulnerable ... Full description.

The ocean and atmosphere each react to changes in the other. These reactions and counter-reactions can snowball until the system builds to a point where potentially disastrous effects occur, such as the El Nino events of 1982-83 and 1997-98. This site describes how the Jet Propulsion Laboratory's TOPEX-Poseidon satellite was used to monitor the amount of sea level rise in the Eastern Pacific Ocean, ... Full description.

This resource presents basic information about how the TOPEX/Poseidon satellite works, what factors affect ocean topography and how ocean circulation affects the Earth's climate. Remote imagery, diagrams, and links to related topics are included. Full description.

Students can learn basic information about El Nino from this description, which makes use of data from the TOPEX/Poseidon mission. Links to related topics are included. Full description.

Users of this resource may direct questions about global change to staff members at the U.S. Global Change Research Information Office (GCIRO). An archive of previous questions and answers is provided, along with links to other global change sites. Full description.

Users can access information designed to protect and prepare themselves from severe weather. Materials presented here include forecasts for aviation and marine interests and the general public, maps, statistical data, educational materials, publications, and links to related sites. Full description.