β why
Why do monsoon rains arrive in seasonal bursts rather than all year round?
ClimateMonsoons
Quick Answer
Monsoons are driven by seasonal shifts in temperature between land and ocean, which reverse wind patterns and pull moist air inland. That creates a wet season and a dry season.
The Full Story
Land heats and cools faster than the ocean, so in summer the continent becomes warmer and lower pressure develops over it. Moist air from the sea then flows inland, rises, and condenses into heavy rain. In winter, the pattern reverses and drier air blows outward from the land. The best-known monsoon systems affect South Asia, but monsoon-like seasonal wind reversals also occur in West Africa, northern Australia, and parts of North America.
Key Facts
1.South Asian monsoons are among the strongest seasonal wind systems on Earth
2.Monsoon rainfall supports agriculture for more than a billion people
3.The wet and dry seasons are caused mainly by pressure differences, not by the calendar alone
YouTube Angle
Suggested video title for this topic:
"Why does the wind flip directions and bring months of rain?"