Temperature varies in ponds and lakes seasonally. During the summer, the
temperature can range from 4° C near the bottom to 22° C at the
top. During the winter, the temperature at the bottom can be 4° C while
the top is 0° C (ice). In between the two layers, there is a narrow zone
called the thermocline where the temperature of the water changes rapidly.
During the spring and fall seasons, there is a mixing of the top and bottom
layers, usually due to winds, which results in a uniform water temperature
of around 4° C. This mixing also circulates oxygen throughout the lake.
Of course there are many lakes and ponds that do not freeze during the winter,
thus the top layer would be a little warmer.
Contents contributed and discussions participated by Megan G
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