1.5 Web-based resources on climate

• The Essentials of Geology website has a quick Flash animation illustrating the three main cycles in the Earth's orbit around the Sun.

• The Department of Geography at the University of Oregon has a selection of global climate animations.

• A brief account of the role of orbital forcing factors in climate change can be found at the NOAA Paleoclimatology Program.

• The Encyclopedia of Earth describes three of the main orbital cycles and their interactions.