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Oceanography and Salinity

1 UPSC Prelims MCQs tagged "Oceanography and Salinity". Free practice with answer keys, explanations, and timed mock tests on Anantam IAS.

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  1. Consider the following statements regarding the distribution of ocean salinity:

    Consider the following statements regarding the distribution of ocean salinity:

    1. AOnly 1 and 2
    2. BOnly 2 and 3
    3. COnly 1 and 3
    4. D1, 2 and 3
    Answer and explanation

    Correct answer: B

    Statement 1 is wrong because the highest open-ocean surface salinity sits in the subtropics around 20°-30° latitude, where evaporation peaks, not at the equator, where heavy rainfall dilutes the surface. Statement 2 is right: Arctic surface salinity swings with the seasonal freezing and melting of sea ice. Statement 3 is also right because high-latitude waters carry a fresh, light surface layer over saltier deep water, so salinity rises with depth through a sharp halocline.

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    Geography UPSC GPSC-2026 Medium