Explanation: The western coast of India experiences very heavy rainfall during the summer monsoon season, primarily due to the presence of the Western Ghats. The Western Ghats are a mountain range that runs parallel to the western coast, stretching from the state of Gujarat in the north to Tamil Nadu in the south. This mountain range plays a crucial role in the Indian monsoon system, particularly in the heavy rainfall received by the western coast.
During the summer monsoon, moisture-laden winds from the Arabian Sea move towards the Indian subcontinent. As these winds encounter the Western Ghats, they are forced to rise over the mountains. As the air rises, it cools and condenses, leading to heavy rainfall on the windward side of the mountains. This phenomenon is known as orographic precipitation. The Western Ghats act as a barrier, causing the air to rise and precipitate, resulting in significant rainfall on the western coast.
The orographic effect is a fundamental concept in meteorology and geography. It explains how topography can influence precipitation patterns. In the case of the Western Ghats, the mountain range's elevation and orientation play a critical role in the formation of heavy rainfall. The Western Ghats are not only a geographical feature but also a biodiversity hotspot, supporting a wide variety of flora and fauna.
It is important to note that while the tropical location of India and the nearness of the sea contribute to the overall climate and moisture content in the air, they are not the primary reasons for the heavy rainfall on the western coast. The Himalayas, located in the northern part of India, play a significant role in the monsoon system by blocking cold winds from Central Asia and forcing the monsoon winds to rise and precipitate. However, they do not directly influence the heavy rainfall on the western coast.
In summary, the Western Ghats are the primary reason for the heavy rainfall on the western coast of India during the summer monsoon. The orographic effect caused by the Western Ghats forces the moisture-laden winds to rise, cool, and condense, leading to significant precipitation. Understanding this concept is crucial for comprehending the geographical and climatic factors that influence rainfall patterns in India.