Greenland's Receeding Ice
July 2000, 8.4 MB

Less ice, more ocean. That's the troubling conclusion emerging from new NASA research to study the condition of Greenland's ice sheet. Using a laser altimeter repeatedly flown across the surface of Greenland, experts say the edges of the ice found there may be thinning at the rate of nearly one meter per year.

http://svs.gsfc.nasa.gov/imagewall/greenland.html

More than Just Carbon Dioxide
January 2002, 2.4 MB

Methane: a simple compound made of carbon and hydrogen, this gas comes from ordinary sources, like cattle herds and garbage dumps. On a planetary scale it also has a significant impact on climate. As it builds up in the atmosphere, it traps energy from the sun like a layer of insulation.

http://www.gsfc.nasa.gov/topstory/20020103greenhouse.html

Evidence of Arctic Warming Grows
October 2003, 3.6 MB

Recently observed change in Arctic temperatures and sea ice cover may be a harbinger of global climate changes to come. Satellite data are allowing researchers to more clearly see Arctic changes and develop an improved understanding of the possible effect on climate worldwide.

http://www.gsfc.nasa.gov/topstory/2003/1023esuice.html