Climate Monitor Online -- A University of East Anglia website produced by the Climate Research Unit.

Climate Resources -- A National Climatic Data Center website.

The Exploration of Earth's Magnetosphere -- A National Aeronautics and Space Administration website.

Goddard Institute for Space Studies -- Goddard Institute for Space Studies is located at Columbia University and is a NASA research laboratory.

Visible Earth -- A National Aeronautics and Space Administration website.

World Climate Research Programme -- World Climate Research Programme is part of the World Meteorological Organization.

World Weather Information Service -- A World Meteorological Organization website.