Why Does the Southwest Monsoon Initially Hit Peninsular India from the Southeast?
The southwest monsoon is a complex weather system unique to the Indian subcontinent, encompassing almost a quarter of the globe. Understanding the dynamics of the southwest monsoon involves an intricate interplay of atmospheric conditions, geographical features, and climatic patterns.
Introduction to the Southwest Monsoon
The southwest monsoon begins its journey over the Indian territory on or around May 15, entering over the Andaman Sea. From this point, the monsoon splits into two major branches: one traveling through the Bay of Bengal and the other crossing the Arabian Sea. Both these branches converge in the Khasi Hills of Meghalaya, near the famous Cherrapunji, known for its highest rainfall in the world.
The Arrival of Monsoon Winds in Peninsular India
By June 5, the two branches of the southwest monsoon merge in the Khasi Hills and diverge in a southeast direction, flowing parallel to the Himalayas. This pattern of the southwest monsoon is crucial for the overall rainfall distribution in peninsular India. The intensity of the monsoon that reaches different parts of peninsular India depends on the strength of the heat low pressure area and the alignment of the monsoon trough.
Factors Influencing the Monsoon's Path and Intensity
The monsoon trough, a low pressure area, plays a pivotal role in determining which branch of the southwest monsoon dominates peninsular India. If the monsoon trough lies over the Gangetic plains, the Bay of Bengal branch will prevail, bringing significant rainfall. Conversely, if the monsoon trough is positioned over the foothills of the Himalayas, the Arabian Sea branch will be predominant.
Additionally, the low pressure systems that form over the northern Bay of Bengal can further influence the wind direction when they move over land. These low pressure systems interact with the landmass, altering the flow of monsoon winds and affecting the local weather conditions.
Conclusion
The southwest monsoon's initial hit on peninsular India from the southeast is a fascinating phenomenon influenced by multiple factors. By understanding these dynamics, we can better predict and manage the complex impacts of this essential weather system on the Indian subcontinent.
Key takeaways:
The southwest monsoon is a unique weather system in the Indian subcontinent. The initial hit on peninsular India is from the southeast through two branches: Bay of Bengal and Arabian Sea. The strength of the monsoon trough determines which branch is more dominant. Local low pressure systems over the Bay of Bengal can affect wind direction.Explore more articles on the intricacies of the Indian monsoon and related topics by visiting our blog.