Offers an extensive listing of links to all aspects of ozone science at different levels from basic fact sheets to more advanced studies. Not updated since June 1998, but has links to ozone sites that are frequently updated.
http://www.epa.gov/ozone/science/science.html

The Union of Concerned Scientists’ ozone depletion site:

The US National Oceanographic and Atmospheric Adminstration’s (NOAA) hurricane main page:

The Earth Space Research Group’s Indian Ocean monsoon scenario:

ESRG’s El Niño Scenario:

The US NOAA Climate Prediction Center site:

A huge site, for information on and analysis of all short-term climate fluctuations. Main topics include drought monitoring, forecasts, ENSO updates; Antarctic ozone hole updates, US temperature and precipitation trends, 1999 global climate highlights, a famine early warning system for Africa, and more.
http://www.cpc.noaa.gov/index.html

The US NOAA Climate Prediction Center’s ENSO main page:

Perhaps the main source for up-to-date information on El Niño/La Niña (ENSO) developments. Gives current status and forecasts, as well as analyses of recent past events, regional analyses and an historical section.
http://www.cpc.noaa.gov/products/analysis_monitoring/ensostuff/

The US Environmental Protection Agency global warming site:

Perhaps the world’s largest global warming website (from the world’s greatest contributor to global warming).
http://www.epa.gov/globalwarming/index.html

The Union of Concerned Scientists’ global warming site:

THE UCS global warming site is within the "Global Resources" section. A relatively small site, but with interesting content on both the science and the international politics of global warming.
http://www.ucsusa.org/warming/index.html

The greenhouse effect:

Gives a straightforward account of the greenhouse effect, together with a set of useful links.
http://www.geocities.com/Athens/Parthenon/5173/greenhouse_effect.html

TOMS (Total Ozone Mapping Spectrometer) satellite information:

A NASA site, TOMS has now expanded to provide images not only of ozone, but also of UV, aerosols and reflectivity levels. There is an interesting news section; downloadable multimedia files, teaching resources and an extensive archive of imagery from the Nimbus satellite (1978–93), Meteor (1991–94) and Earth Probe (1996–present): just choose your satellite, your preferred image type and your date!
http://jwocky.gsfc.nasa.gov/

The UK Meteorological Office home page:

An excellent site: use for UK and world weather forecasts, UK weather warnings and world weather news. Good information sections on the UK climate (lots of statistics!); education (for how forecasts are made; how automatic weather stations work; and lots of facts on tropical cyclones); research (including ozone); news; and links.
http://www.meto.govt.uk/home.html

USA Today, Weather:

Keep an eye on the weather in the USA via this easy-reading US on-line newspaper site with excellent graphics; also contains detailed world weather forecasts, world weather news and information on Antarctica, hurricanes, tornados, etc.
http://www.usatoday.com/weather/wfront.htm

The BBC Weather Centre:

Another good site with information ranging from the current weather forecast to historical aspects of weather forecasting. Some good articles in the "Features" section.
http://www.bbc.co.uk/weather