How could it happen that more than a dozen of the most prestigious scientific associations signed and submitted this letter on ‘climate change’ without having ensured that the used terminology is sufficiently defined. Read the rest of the entry
The UNFCCC does not define ‘climate’ at all, while
WMO says: 'climate' is average weather.
This website will provide information and ask, does science know what climate is?
The US Environmental Protection Agency Glossary on Climate & Weather
Note: Intended text and marked with: WIC, indicates that Question, Info, Comment, etc,
are from ‘whatisclimate’ (WIC)
The US EPA – Environmental Protection Agency - runs a ‘Glossary of Climate Change Terms’, offering as meaning for the term ‘climate’ only"average weather". The same texts are also used elsewhere. Although it is not easy to discuss a term which is a layman’s imagination, and used to be in meteorology, “ a menial occupation that came on the pecking scale somewhat below the advertising profession”, some remarks have been made, which shall be improved whenever deemed possible.
EPA on Climate:
Atmospheric condition at any given time or place.
It is measured in terms of such things as wind, temperature, humidity, atmospheric pressure, cloudiness, and precipitation.
In most places, weather can change from hour-to-hour, day-to-day, and season-to-season.
Climate in a narrow sense is usually defined as the "average weather", or more rigorously, as the statistical description in terms of the mean and variability of relevant quantities over a period of time ranging from months to thousands or millions of years. The classical period is 30 years, as defined by the World Meteorological Organization (WMO). These quantities are most often surface variables such as temperature, precipitation, and wind. Climate in a wider sense is the state, including a statistical description, of the climate system.
A simple way of remembering the difference is that climate is what you expect (e.g. cold winters) and 'weather' is what you get (e.g. a blizzard).
 F. Kenneth Hare, 1979, “The Vaulting of Intellectual Barriers: The Madison Thrust in Climatology”; Bulletin American Meteorological Society; Vol. 60, No.10, October 1979, Pages 1171 – 1174.
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