Describe how temperature differences in the ocean account for currents SPI 0607.8.3

Links verified 7/28/2014

1. Ocean Currents - two excellent videos from NOAA; select Global Impact to see the second video
2. Ocean Currents - scroll past the Google ads to see content
3. Ocean Currents and Climate - a large number of excellent images are includes with this explanation
4. Ocean Surface Currents - [A web-based ocean current reference site] Each current has important links, summary text detailing velocity and hydrographic observations, and plots such as, average current speed and locations, drifting buoy positions, sea surface temperature maps.
5. Picturing the Gulf Stream Current - some of the history of Benjamin Franklin's discovery
6. Surface Ocean Current Map - warm and cold currents are color coded on this map
7. Surface Ocean Currents - three levels of explanation are available from Windows to the Universe - select Beginner, Intermediate, or Advanced

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