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Hurricanes don't necessarily need the water to be a certain depth as long as the water in a shallow area is warm all the way to the bottom. What you're probably referring to is the necessity that, when in deeper waters, there is a significant (150 feet is a common estimate) layer of warm (80F+) water at the surface. The reason for this is that as a hurricane passes over the water, it will generate waves intense enough to mix a shallow layer of warm water with cooler waters beneath it. In this way, the hurricane will rob itself of the warm water it needs.
A line where temperature changes.
Generally speaking the greater the depth of the warm water, the stronger the hurricane can get. Is is because a greater depth means a greater volume of warm water to supply energy for a hurricane.
A walrus stays warm in the cold ocean.or Penguins can stay warm in cold arctic waters.
Turnover
The cold spots is water from the deep end of the lake or pond that got mixed up to the surface by wind or a boat or something. The deeper the water naturally the colder its gonna be and the windier the day most likely the water will be cooler due to a lot of mixing going on.
Deeper colder water can be churned up by currents in a lake. The currents can be caused by wind or upwelling (water introduced from below) the stratification of water in a lake is a very complex mater.
This is known as a thermocline. It is a layer where the temperature decreases rapidly with depth. The thermocline often separates the warm surface waters from the colder deeper waters in a lake or ocean.
Hurricanes don't necessarily need the water to be a certain depth as long as the water in a shallow area is warm all the way to the bottom. What you're probably referring to is the necessity that, when in deeper waters, there is a significant (150 feet is a common estimate) layer of warm (80F+) water at the surface. The reason for this is that as a hurricane passes over the water, it will generate waves intense enough to mix a shallow layer of warm water with cooler waters beneath it. In this way, the hurricane will rob itself of the warm water it needs.
Water temperatures in Newfound Lake in New Hampshire are generally in the low to mid 70's in July. After a warm spell they can spike to the upper 70's
High temperature.
it would gradually warm up, the speed at which it heats up and then looses that heat at night all depends on location, depth and surface area of that lake.
thermocline
Water is not easy to warm up, so during the day the water is cooler than the land. This causes the lake to cool the air above it. The cooler, denser air the sinks, and must spread out onto land when it reaches the surface.
no
thermocline