Monsoon of South Asia
Monsoon of South Asia
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Monsoon of South Asia

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Monsoon of South Asia

The Monsoon of South Asia is among several geographically distributed global monsoons. It affects the Indian subcontinent, where it is one of the oldest and most anticipated weather phenomena and an economically important pattern every year from June through September, but it is only partly understood and notoriously difficult to predict. Several theories have been proposed to explain the origin, process, strength, variability, distribution, and general vagaries of the monsoon, but understanding and predictability are still evolving.

The unique geographical features of the Indian subcontinent, along with associated atmospheric, oceanic, and geographical factors, influence the behavior of the monsoon. Because of its effect on agriculture, on flora and fauna, and on the climates of nations such as Bangladesh, Bhutan, India, Nepal, Pakistan, and Sri Lanka – among other economic, social, and environmental effects – the monsoon is one of the most anticipated, tracked, and studied weather phenomena in the region. It has a significant effect on the overall well-being of residents and has even been dubbed the "real finance minister of India".

The word monsoon, derived from the Arabic word موسم (mawsim) meaning "season", colloquially refers to a season of greatly intensified precipitation that occurs in some coastal regions in the tropics and subtropics. Scientifically however, while generally defined as a system of winds characterized by a seasonal reversal of direction, there are several more detailed definitions used by various meteorological and climatological sources. Some examples:

Thus, similar seasonal precipitation patterns in other parts of the world are not always true monsoons.

The first people to observe the combined pattern of the monsoons' branches over different regions of South Asia were sailors in the Arabian Sea who traveled between Africa, India, and Southeast Asia.

The monsoon can be categorized into two branches based on their spread over the subcontinent:

Alternatively, it can be categorized into two segments based on the direction of rain-bearing winds:

Based on the time of year that these winds bring rain to India, the monsoon can also be categorized into two periods:

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