Clouds on polar regions-Earth
http://www.spaceflightnow.com/news/n0704/27clouds/
Scientists predict that certain changes in cloud properties can accelerate climate change. "The polar regions are very sensitive indicators of climate change," said Deborah Vane, project manager and deputy principal investigator for the CloudSat mission at NASA's Jet Propulsion Laboratory, Pasadena, Calif. "It's been well reported now that the polar ice caps are undergoing net melting. There's a complicated interaction between clouds and climate in polar regions that can contribute to temperature changes, and, in turn, speed the rate at which ice melts."
An indication of the sun is more to blame for global warming than human CO2?
From what I have heard from the sun influenced global warming group clouds are the main reason.