It’s cold outside – must be global cooling

With the bone-chilling cold snap that we’ve been having here in the Canadian Prairies for most of December, it is obvious that the earth is cooling.  Here is a graph that I produced using NASA data, that provides all the proof needed:


But on second thought, I’m remembering that November was an unusually warm month.  So the earth was obviously warming back then.

But on third thought, maybe both of the above statements are confusing weather with climate, if we accept the following definition:

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. 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.

If climate requires averaging over decades, perhaps graphing four years isn’t enough.  I’ve decided to add on another 124 years:

Global temperatures 1880 to 2008.

Maybe I’ll stop worrying about that global cooling trend.

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