Examine the satellite view of chlorophyll concentrations in the southern Atlantic Ocean along the southwest coast of Africa (the nations of Namibia and South Africa). Which of the following statements offers the best explanation for the observed pattern(s)?
A)This is an area of downwelling, where water is sinking due to the higher density it gains when sea ice forms and salinity increases.
B)This is an area of upwelling, where nutrient-rich water is rising due to winds blowing over the ocean's surface.
C)This is an area of shallow water and waves breaking as they "feel bottom."
D)The coast is a "dead zone," an area of very low biological activity.

Question

Examine the satellite view of chlorophyll concentrations in the southern Atlantic Ocean along the southwest coast of Africa (the nations of Namibia and South Africa). Which of the following statements offers the best explanation for the observed pattern(s)?
A)This is an area of downwelling, where water is sinking due to the higher density it gains when sea ice forms and salinity increases. 
B)This is an area of upwelling, where nutrient-rich water is rising due to winds blowing over the ocean's surface. 
C)This is an area of shallow water and waves breaking as they "feel bottom." 
D)The coast is a "dead zone," an area of very low biological activity.

Quizplus · Accepted Answer

The observed pattern of high chlorophyll concentrations along the southwest coast of Africa is best explained by the fact that this is an area of upwelling, where nutrient-rich water is rising due to winds blowing over the ocean's surface. This increased nutrient availability leads to higher levels of chlorophyll and other phytoplankton, which form the base of the marine food chain.

Examine the Satellite View of Chlorophyll Concentrations in the Southern