Depiction of global ground-water fluctuations on a monthly basis from 2002 to present. Navigate months and years by mousing along bottom-aligned timeline.

Requires a webGL capable browser such as Chrome, Safari, or Firefox. For unsupported browsers and computers, the following is a screencast video : http://vimeo.com/32062020.

Associated graphics and storyboard are no longer available as the Heads Up Challenge is over.