Global Warming isn’t a new phenomena, if it’s even real (it’s still a hotly contested issue), and maps showing the trends of head and water currents have been around for centuries. Over at the GlobalWarmingArt website they’ve got a nice collection of maps showing several effects believed to be related to Global Warmimg, with information on the source data and algorithms used.
Randall Hand
Randall Hand is a computer graphics programmer and news junky that's been working in the field for the last 15 years. He's responsible for visualizations generated on some of the most powerful supercomputers in the world, ytnef, mullion support in ParaView, and VizWorld.com.