Question

)The periodic change in pressure conditions is known as the Southern Oscillation. (B) The monsoon is known for its uncertainties.
which is true
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Answer 1

Answer:

answer A is true

Explanation:

The periodic change in pressure conditions is known as the Southern Oscillation

Answer 2

Explanation:

Winds move from a high-pressure area to a low-pressure area. During winter, there is a high-pressure area north of the Himalayas. Cold dry winds blow from this region to the low-pressure areas over the oceans to the south. In summer, a low-pressure area develops over interior Asia as well as over northwestern India. As a result, the low-pressure system attracts the southeast trade winds of the southern hemisphere. On crossing the equator, these trade winds-due to the Coriolis force-turn right towards the low-pressure areas over the Indian subcontinent. After crossing the equator, these winds start blowing in a south-westerly direction, and enter the Indian peninsula as the southwest monsoon. These are known as the South-west Monsoon winds. These winds blow over the warm oceans, gather moisture and bring widespread rainfall over the mainland of India. The upper air circulation in this region is dominated by a westerly flow. The rainfall received by India is largely due to the south-west monsoon winds. The duration of the monsoon is between 100 to 120 days. Hence, the bulk of rainfall received by the country is concentrated over a few months.