How does the warming of Arabian Sea water affect the southwest monsoon in India? Class 9

How does the warming of Arabian Sea water affect the southwest monsoon in India? Class 9

Think It Over (Page 252)

Quality 1.

How does the warming of Arabian Sea water affect the southwest monsoon in India? Class 9

Answer:

Warmer Arabian Sea water leads to increased evaporation from the sea surface. This extra moisture in the atmosphere causes fluctuations in the southwest monsoon, resulting in variable rainfall — bringing floods to some regions of India while leaving others in drought. Essentially, a warmer sea disrupts the balance of the hydrosphere and intensifies the monsoon system unevenly.

Question 2.

If a large forest is cleared, how can that affect the flow of a river in that area? Class 9

Answer:

Clearing a large forest reduces transpiration (water released by trees into the atmosphere), which can lower local rainfall over time. Without tree roots binding the soil, erosion increases and less water infiltrates into the ground, reducing groundwater recharge. This means less steady water feeds the river. Ironically, during rain events, more water runs off directly into the river (since it can’t be absorbed), potentially causing floods followed by dry spells — making river flow more erratic and unreliable.