Produced by the National Aeronautics and Space Administration's Jet Propulsion Laboratory in Pasadena, Calif., the Global Climate Change Web site provides information about the causes and effects of climate change and how NASA studies it.

Among the features offered is a continuously updated snapshot of Earth's health, built from NASA data on such climate indicators as the condition of Earth's ice sheets, global average temperatures, sea level change and concentrations of key greenhouse gases.

Also offered are interactive visualizations of current climate data, including a Sea Level Viewer that provides views from space of ocean surface topography data and related phenomena such as El Nino. A Global Climate Change Time Machine takes users back in time to see how Earth's climate has changed in the past and how it is projected to change in the future.

The new information can be found at http://climate.jpl.nasa.gov