The National Oceanic and Atmospheric Administration has created a climate portal as an attempt to organize the sources and kinds of climate information. It opens onto "ClimateWatch", an online magazine. Other tabs are "Data & Services", "Understanding Climate" and "Education"
Here is a good summary: About NOAA Climate Services Portal
The National Oceanic and Atmospheric Administration (NOAA) Research office works to provide "better forecasts, earlier warnings for natural disasters and a greater understanding of the Earth." Visitors can find about those subjects here and they may wish to start their journey through the site in the "NOAA Research From A to Z" area. It's a great way to learn about their work on everything from air quality to zoo plankton, and each section contains links to other relevant sites. Moving on, visitors will also want to click on over to the "Climate Research" area which provides updates on their work on modeling climate change, the ozone layer, and other germane matters. Of course, visitors would be remiss not to look at the "Weather Research" area as this is where NOAA research truly shines.
Source: The Scout Report, Univ. of Wisconsin, Sept. 5, 2008
The Sea Grant Marine Advisory Services, Virginia Institute of Marine Sciences (VIMS), part of the College of William & Mary has created a webpage with links divided into the following categories: Climate & Weather | Global Climate Change | El Niño/La Niña | Storms