The National Geophysical Data Center (NGDC), located in Boulder, Colorado is a project of the US Department of Commerce, National Oceanic & Atmospheric Administration, and National Environmental Satellite, Data and Information Service. This site is an informational resource for glaciology, marine geology and geophysics, paleoclimatology, solar-terrestrial physics, and solid earth geophysics. The...

The study of paleoclimatology is an activity that goes on all around the world, in large part because such a vast undertaking entails collecting scientific data from many different sites. As such, this site has a great deal to offer both scientists working in the field and the layperson who may be interested in learning more about the world of paleoclimatology. One area that may be of particular...

The National Geophysical Data Center provides the paper "Northern Hemisphere Temperatures During the Past Millennium: Inferences, Uncertainties, and Limitations" online. The article suggests, at moderately high levels of confidence, that 1998 was the warmest year and the 1990s were the warmest decade. The abstract may be viewed in HTML format, and the full-text article is available in .pdf format.