I need some help with Part A&B of my Oceanography homework a. Answer the followi
ID: 112447 • Letter: I
Question
I need some help with Part A&B of my Oceanography homework
a. Answer the following about FREEZING OF ICE ON A FRESHWATER POND: a. Explain the process by which ice freezes on a fresh water (zero salinity) pond when heat is lost only through the surface. Assume the initial temperature of the the water in the basin is 6 C Specifically, describe how the loss of heat from the surface boundary layer of the pond affects the stability condition of the entire pond up to when the temperature of maximum density is reached; and how after the maximum density is reached, the stability condition that occurs in the boundary layer (BL) governs the temperature of the BL and, ultimately, the freezing of ice on the surface of the pond. Use the exact temperature of maximum density and the freezing temperature.Explanation / Answer
a) As the temperature increases the density of water decreases.So Ice has more density than the water.The density of water rises from 0 degree Celsius to 4 degree celsius.On the bottom of 4 degree Celsius warm is present and above it cold water is present.So 4 degree is the middle point of the ice and water.At 0o water becomes ice.So at the bottom it will be warm enough.So the water freezes first at the top surface of fresh water.This is how the fiish will survive at the bottom during winters.Usually the freezing point of fresh water is 0o c.And maximum density at the 4oc.The latter point is important as the deeper water located under the ice does not freeze.As the density increases with the decrease in temperature,the pond from the surface to bottom,it wil reach to 4oc after some time.When the surface cools, the temperature decreases and the thin layer on the surface freezes and becomes denser,so Ice is formed on the layer of the surface.If the temperature decreases to 40c then the layer close to the surface becomes lighter than the water below 4oc.Then Ice is lighter than water and it floats.And below 40c the water remains warmer.
b)The temperature of water just below of the newly frozen ice will be at 40c.