10-11-2010, 05:21 PM
It is when surface waters either are increasing in temperature (in the spring) or decreasing in temperature (in the fall), in both situations becoming more dense, and the heavier water sinks while the less dense water comes to the surface.
I'm not sure what the ideal temperature is that makes this happen at each time, but others might. It has everything to do with the temperature reaching a certain point and sinking, bringing the water below it to the top.
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I'm not sure what the ideal temperature is that makes this happen at each time, but others might. It has everything to do with the temperature reaching a certain point and sinking, bringing the water below it to the top.
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