What causes a monsoon to form?
As air rises near the equator and then flows poleward, it leaves an area of fewer air molecules at the equator. … Water vapor condenses as air rises and cools in the ITCZ, forming clouds and falling as rain. The ITCZ can be seen from space as a band of clouds around the planet. This is where monsoon rainfall occurs.
What is monsoon short answer?
A monsoon is a seasonal change in the direction of the prevailing, or strongest, winds of a region. Monsoons cause wet and dry seasons throughout much of the tropics. Monsoons are most often associated with the Indian Ocean. Monsoons always blow from cold to warm regions.
Does Africa have a monsoon season?
Monsoon rainfall over West Africa occurs during the June through September period (Figure left panel). … The so-called long rains prevail during spring (MAM) and the short rains during autumn (OND). Thus the transition (equinox) seasons bring most rainfall to East Africa (Figure right panel).
What is known as onset of monsoon?
The season that is marked by the onset of monsoon is known as south-west monsoon. It is also called as rainy season. It sets in when winds blowing from Arabian Sea and Bay of Bengal carry moisture and hits the mountains. It lasts from June to September.
What is winter monsoon?
Winter monsoons have a dominant easterly component and a strong tendency to diverge, subside, and cause drought. Both are the result of differences in annual temperature trends over land and sea. In atmosphere: Effect of continents on air movement. … persistent offshore flow called the winter monsoon occurs.
What would happen if the monsoons are weak in a year?
When the summer monsoon is late or weak, the regions economy suffers. Fewer people can grow their own food, and large agribusinesses do not have produce to sell. Governments must import food. Electricity becomes more expensive, sometimes limiting development to large businesses and wealthy individuals.
How long do monsoons last?
Monsoon runs from June 15 to Sept. 30. It used to start only after three consecutive days with a dew point of 54 degrees or higher. The weather service changed it to the calendar dates in 2008. Monsoon storms make for amazing videos and photos.
What are the negative effects of monsoons?
While a poor monsoon season can trigger food crisis and have a negative impact on a country’s economy, an excep- tional monsoon can have disastrous consequences on people’s lives and property due to floods and landslides triggered by torrential rains.
What’s an example of a monsoon?
An example of a monsoon is a storm that causes heavy flooding and extreme wind damage. The rain that comes with any of these winds or wind systems. A wind from the southwest or south that brings heavy rainfall to southern Asia in the summer. … The rains that come with any of these winds or systems.
What is a monsoon Class 9?
A monsoon is a seasonal wind which lasts for several months. The word was first used in English for the seasonal rains in the Indian subcontinent. These rains blow in from the Indian Ocean and Arabian Sea in the southwest bringing heavy rainfall to the area.
What are the types of monsoons?
According to the Philippine Atmospheric Geophysical and Astronomical Services Administration, the country experiences two kinds of monsoons—the northeast monsoon and the southwest monsoon.