In 2013 I posted about an observation that the wind seemed to be driving the water of a lake to one end - I wondered about more water piling up at one end than the other.
http://wigtonphysics.blogspot.com/2013/12/what-happens-to-all-that-water.html I was reading the wonderful old natural history book above and got a clue. They say that when the wind stops blowing, you get a low frequency oscillation of water backwards and forwards. The signifance in the book is that this mixes up fixed temperature layers in the water in a way that is significant to the organisms that live in the water. A bit of research shows that the phenomenon has a name: SEICHE
https://oceanservice.noaa.gov/facts/seiche.html#:~:text=Seiches%20are%20typically%20caused%20when,for%20hours%20or%20even%20days. I think that the bit referred to in the book is probably an "internal seiche"
https://link.springer.com/referenceworkentry/10.1007%2F978-1-4020-4410-6_160#:~:text=An%20internal%20seiche%20is%20a,opposite%20direction%20(Figure%201).
because this directly wobbles the layer that divides the upper mixed layer from the calm deep water beneath.
