In a temperate zone lake,what should the temperature profile be immediately after the fall overturn?

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After the fall overturn, the temperature profile in a temperate zone lake should be 4°C throughout. This is because during the overturn, the surface water cools down and sinks, mixing with the deeper water which is already at 4°C. This results in a uniform temperature of 4°C throughout the water column.

In a Temperate Zone Lake,what Should the Temperature Profile Be