Lots of people discuss 'climate change'.
What does the word 'climate' mean?
What does the word 'climate' mean?
Climate is 'an average over 3 decades'.
For example .... rainfall in Ireland.

So ..... 3 full, conventional decades......such as 1981 to 2010.
And another example - 'Average temperature 1951-1980'
The definition of 'climate' goes back at least 100 years.
If we are discussing climate change, that is what 'climate' means.
Climate change means change in the 30-year average.
Not over a week, or a season.
But in recent times, global temperatures have changed quickly.
So it can be useful to look at single decades.

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