In the attached I have discussed how nonlinearity arises as we analyze the Russian data for precipitation reported by several weather stations (184 total). This also been posted in response to a question on nonlinearity posed by Prof. Derek Abbott, which is reproduced below.
The paradox of infinity: where does the nonlinearity come from?
The principle of linear superposition holds for the integers, eg. 3 + 4 = 7. However, when we take the integers out to infinity we now obtain nonlinear behaviour. Infinity plus any amount is still infinity, so linearity has broken down.