| Weather Programs and Organizations |
|---|
 | World Meteorological Day (WMD)
(annually: 23 March) |
 | International Meteorological Centenary
(100th anniv. IMO-WMO: 1873-1973) |
 | 50th Anniversary of the World Meteorological Organization (WMO)
(1950-2000) |
| World Meteorological Organization (WMO)
(Does not include WMO-specific
(WMD, IMO-WMO Centenary, WWW, GAW, and 50th Anniversary WMO)
items in the links directly above.) |
 | World Weather Watch (WWW) and
Global Atmosphere Watch (GAW) |
 | Global Atmospheric Research Program (GARP), GARP Atlantic Tropical Experiment (GATE), and
Global Weather Experiment (GWE)
(also World Ocean Circulation Experiment (WOCE)) |
 | National weather services, centers, and observatories
(and their anniversaries, as well as meteorological schools and training facilities, meteorological outreach, private meteorological services or organizations, and meteorological societies) |
| Weather-Related Programs |
|---|
  | International Polar Year (IPY)
(1st: 1882-1883; 2nd: 1932-1933;
3rd: see IGY; 4th: 2007-2008) |
 | International Geophysical Year (IGY)
(1957-1958) |
 | International Quiet Sun Year (IQSY)
(1964-1965) |
 | International Heliophysical Year (IHY)
(2007-2009) |
  | International Hydrological Decade (IHD)
(1965-1974) |
 | International Decade for Natural Disaster Reduction (IDNDR)
(1990s) |
 | Peaceful Uses of Outer Space (PUOS) |
 | Mission To Planet Earth (MTPE) |
 | Scientific Committee on Antarctic Research (SCAR) |
| Weather Instruments and Measurements |
|---|
 | Thermometers, temperatures and temperature units |
 | Barometers, atmospheric pressure and pressure units |
  | Anemometers, windsocks, wind vanes, wind measurements, and wind towers |
 | Weather balloons and radiosondes
(and pilot balloons, tracking theodolites, tracking antennas and equipment, and Eole, Argos and other un-manned stratospheric balloons) |
  | Precipitation (rain and snow) gauges
(plus evaporation pans, water-depth gauges, snow-depth measurements, and precipitation amounts) |
 | Sunshine recorders/heliographs, actinometers, and pyranometers
(and signaling heliographs) |
 | Ground-based remote sensing in meteorology
(radar, lidar, sodar, etc.) |
 | Stevenson screens
(weather instrument shelters) |
 | Weather maps
(surface and upper-level weather maps, station models, weather symbols, and streamlines) |
 | Satellite remote sensing of the earth: Images, instruments, and techniques |
  | Automatic weather observing stations
(land autostations, and ocean buoys) |
 | Ocean weather ships |
| Weather Phenomena |
|---|
 | Clouds and skies
(only items with clear intent to show clouds) |
 | Tornadoes, waterspouts, and dustdevils |
 | Hurricanes, typhoons, and tropical cyclones
(and tropical cyclone relief overprints) |
| Other Weather-Related Categories |
|---|
 | Atmospheric water cycle |
 | Ozone (O3)
(including World Ozone Day, annually: 16 September;
and Montréal Protocol, 1987) |
  | Weather modification
(rain enhancement, and hail and lightning suppression) |
| Climatology |
|---|
 | Climatic regions and climate-related maps |
 | Climate-related international conferences |
  | Anthropogenic climate change
(including greenhouse effect, greenhouse gases, and global warming) |
  | Natural climate change and variability |
| Climate research (including observations, programs, and institutes) |
 | Preserve the Polar Regions and Glaciers (PPRG) |
 | Drought and desertification |
 | Flood-related |
 | General references to climate and climatology |
| Meteorologists, Climatologists, Atmospheric Scientists, and other Contributors to Meteorology and Climatology |
|---|
 | Chronological and alphabetical indexes
|
 | Climatologists and contributors to climatology |
| Total: 40+ major divisions |
|---|
