Imagine x=2π is Wyoming, x=3π is Berlin, y depicts average winter temperature. Expected situation is b=2.5; current situation is b=2.75.
This is of course a silly example, but illustrates the idea of what happens when you push around parameters of a periodic function. Weather is spatially periodic.
Simple way to imagine it: take the first interactive graph at https://www.intmath.com/trigonometric-graphs/2-graphs-sine-c....
Imagine x=2π is Wyoming, x=3π is Berlin, y depicts average winter temperature. Expected situation is b=2.5; current situation is b=2.75.
This is of course a silly example, but illustrates the idea of what happens when you push around parameters of a periodic function. Weather is spatially periodic.