# Atlanta College of Art Limnology Discussion

Answer the questions on the last page of instructions. make sure you have complete answers.

the question below is not complete. Please Find more detail in attached files.

1. Using data on water density as a function of temperature (provided), make a plot of water density for various temperatures. Plot 1) thermally inferred density vs. depth and 2) temperature vs. depth, both at the time of maximum thermal stratification in your dataset.
2. Thermal resistance to mixing is a function of the density difference between the top and bottom of a defined thickness of water. For any column of water with a uniform temperature gradient and dimensions specified, relative units of thermal resistance (‘work’) can be determined from

3. Plot
temperature as a continuous curve vs. depth using your data for the temperate lake under 2
scenarios: 1) stratified and
2) post-ice or mixed. Using the curves generated to infer
temperatures between the actual measurements you made, prepare a table as below
for each scenario

 Depth interval t2 p2 t1 p1 (p2–p1) 0-1 cm 1-3cm 3-5cm Etc.

In the preceding table, t1 and t2 are the temperatures at the top and bottom respectively and p1 and p2 are the corresponding densities at temperatures t1 and t2. Plot the relative thermal resistance as a function of depth. Note the differences between wind and no wind. What can be inferred about turbulence and vertical currents in the thermocline?