The UNFCCC1 does not define ‘climate’ at all, while WMO2 used to define climate as: the average weather over a longer period of time. This website will provide information and ask, does science know what climate is?
1. United Nations Framework Convention on Climate Change; 2.The World Meteorology Organisation
What is Climate, had been asked when: Climate Science:
Roger A. Pielke Sr Research Group Weblog started in July 2005
A great weblog closed down after two years in operation. Roger A. Pielke Sr. was highly praised for his objectivity, tenacity and patience. Whatisclimate fully endorse the appraisal. Because ‘Whatisclimate’ regards necessary to press for clarification: What is climate; or stop using this term as a political or scientific tool to avoid misunderstanding and confusion, it seems reasonable to pickup an issue with which the weblog Climate Science started operation on 11 July 2005. The first sentence reads:
The title of this weblog is “Climate Science,” so the first thing
we need to do is define “climate.” For many, the term refers to
long-term weather statistics.
Attention should also receive the following extracts from the opening Weblog:
The last excerpt shows clearly why it is so necessary for not letting Climate Science go without a comment. The primary approach had been interesting, emphasising the role of the oceans is great, complaining about the use of ‘global warming’ with ‘climate change’ interchangeable is very appreciable, but what is climate? Surprisingly, the text offers no more than the reference to http://www.nap.edu/openbook.php?isbn=0309095069 , which was consulted but in vain, climate was not defined, only six terms that include the word climate.
Maybe R. Pielke thought that making a reference to the 2005 National Research Council (NRC) report tells all about the term climate. But could it be that he indeed believed that “climate is the system consisting of the atmosphere, hydrosphere, lithosphere, and biosphere? (see above). The NRC report (Glossary) defines only climate system, also the UNFCCC, by stating that: "Climate system" means the totality of the atmosphere, hydrosphere, biosphere and geosphere and their interactions. Each of these terms explains nothing. They are absolute useless as scientific terms. Their use must cause confusion. The totality of the atmosphere, hydrosphere, biosphere and geosphere and their interactions represents the global natural system.
Unfortunately the Climate Science remained unspecific with regard to the meaning of climate. Actually only eight times the section “Definition of Climate” had been activated. In the subsequent posting: What is Climate Change? ,July 29, 2005, the concern was not ‘climate’, but climate change, and climate forcing. There on followed:
The core question on what is climate was practically never discussed. But this makes reading the placed subjects and the comments not necessarily less interesting even though the site has been closed. ‘Whatisclimate’ abstains of commenting as many contributions speak for themself. At least it illustrates hat there had been little interest to search and demand a reasonable climate definition.
The problematic with the term climate may be highlighted with another and final extract from Climate Science on 16 November, 2006, of which the last sentence reads:
How can serious science claim, “that the dispersion of natural and anthropogenic aerosols into the atmosphere are integral components of the climate system”, when such dispersion go into the atmospheric system and become part of the atmospheric system? Is the ‘switch’ to another name naïve or a trick? It is misleading to speak about a ‘climate system’ if one does not know what climate is.
 August 25, 2007, Climate Science Is Retiring; Comment 7
 A link is attached http://www.nap.edu/books/0309095069/html/15.html which provides no definition on ‘ climate’, but for ‘climate forcing’ and on ‘ Climate system’ as follows: The system consisting of the atmosphere, hydrosphere, lithosphere, and biosphere, determining the Earth’s climate as the result of mutual interactions and responses to external influences (forcing). Physical, chemical, and biological processes are involved in the interactions among the components of the climate system.
 Climate feedback, Climate forcing, Climate model, Climate response, Climate sensitivity parameter or climate feedback parameter, Climate system
 Climate system: The system consisting of the atmosphere, hydrosphere, lithosphere, and biosphere, determining the Earth’s climate as the result of mutual interactions and responses to external influences (forcing). Physical, chemical, and biological processes are involved in interactions among the components of the climate system.
 UNFCCC, Article 1, paragraph 3.
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