NASA Climate Change Science Website

 NASA has an excellent Climate Change evidence website:
Climate.NASA




It's a highly interacticve website including a feature where you can search data for yourself:
 My NASA Data

And an excellent slide show where you can see the effects of climate change in America:
State of_Flux

From the main NASA Climate page:

• The heat-trapping nature of carbon dioxide and other gases was demonstrated in the mid-19th century. Their ability to affect the transfer of infrared energy through the atmosphere is the scientific basis of many JPL-designed instruments, such as AIRS. Increased levels of greenhouse gases must cause the Earth to warm in response.
• Ice cores drawn from Greenland, Antarctica, and tropical mountain glaciers show that the Earth’s climate responds to changes in solar output, in the Earth’s orbit, and in greenhouse gas levels. They also show that in the past, large changes in climate have happened very quickly, geologically-speaking: in tens of years, not in millions or even thousands.

The evidence for rapid climate change is compelling.

An explanation of NASA's role  in climate change science:

"In 2004, NASA's spending on climate science exceeded all other Federal agencies, combined. NASA spent $1.3 billion on climate science that year, out of a $1.9 billion total. The agency provides information on solar activity, sea level rise, the temperature of the atmosphere and the oceans, the state of the ozone layer, air pollution, and changes in sea ice and land ice. NASA scientists regularly appear in the mainstream press as climate experts. "

later in the article ...

"These capabilities -- nearly 30 years of satellite-based solar and atmospheric temperature data -- helped the Intergovernmental Panel on Climate Change come to the conclusion in 2007 that "Most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations." But there's still a lot to learn about what the consequences will be. How much warmer will it get? How will sea level rise progress? What will happen to soil moisture, and therefore agricultural production, in a warmer world? NASA scientists and engineers will help answer these and other critical questions in the future."

Read the full article