Weather
Animations
Seasonal Changes from Geostationary Satellite
Seasons
http://www.astro.illinois.edu/projects/data/Seasons/seasons.html
http://esminfo.prenhall.com/science/geoanimations/animations/01_EarthSun_E2.html
Length of Day throughout the Year
Changes in Earth's Heat with the Seasons
Continental Polar and Maritime Tropical Air Masses
Warm and Cold Fronts
http://www.mesoscale.iastate.edu/agron206/animations/05_cnWfronts.html Excellent!
http://www.atmosphere.mpg.de/enid/Climate_in_brief/-_Weather_2t7.html
Online Documentaries
"The Death Zone" -- Climbing Everest.
"Global Dimming" -- Smog and contrails.
"Hunt for the Supertwister" -- PBS