Mixed Layer Dynamics Quiz

This form allows you to test yourself on your knowledge of mixed layer dynamics. The first two questions are multiple choice and will be automatically graded when you press the submit button at the bottom.

Choose the correct answer (only one answer)

1. For usual temperate oceanic conditions, when temperature dominates the density (salinity is not a factor), why is the mixed layer temperature always warmer than the deeper water?
    (a) It is closer to the sun.
    (b) The air is hot.
    (c) Warm water floats above cold water.
    (d) Friction from ships generates heat.
    (e) None of the above.

2. In special circumstances, salinity can be as or more important for water density than temperature. After rain, mixed-layer temperature may be colder than before because
    (a) The rain may be colder than the seawater.
    (b) The ocean radiates away heat.
    (c) Wind during the rainstorm may mix up cold water from below.
    (d) Ships going by may mix up cold water from below.
    (e) All of the above.