Question

Q. With reference to vertical temperature distribution in oceans, consider the following statements:

Which of the statements given above is/are correct?

• A. 1 only
• B. 2 only
• C. Both 1 and 2
• D. Neither 1 nor 2

Answer 1

The correct option is B 2 only

Explanation:

• Statement 1 is incorrect. The temperature-depth profile for the ocean water shows how the temperature decreases with the increasing depth. The profile shows a boundary region between the surface waters of the ocean and the deeper layers. The boundary usually begins around 100 - 400 m below the sea surface and extends several hundred meters downward. This boundary region, from where there is a rapid decrease of temperature, is called the thermocline
• Statement 2 is correct: About 90 percent of the total volume of water is found below the thermocline in the deep ocean. In this zone, temperatures approach 0° C.