Why does the monsoon trough of low pressure over the Northern Plains of India , become weaker during October -November ?
Answers
Answer: HOPE IT HELPED YOU PLEASE ADD BRAINLIST OR AT LEAST THANK.
Explanation: The four-month southwest monsoon season, which brings as much as 70 per cent of the country’s annual rainfall, officially begins on June 1, with the onset over Kerala, and ends on September 30.
It takes about a month and a half after onset on the Kerala coast to cover the entire country; and about a month, beginning from the northwestern parts of the country on September 1, to withdraw completely.
Situation at Present
In the last 13 years, for example, only once has the onset over the Kerala coast happened on June 1.
Similarly, the commencement of withdrawal has happened in the first week of September only twice during this period, and last year, the withdrawal started as late as October 9 and was completed in around a week.
The main question before IMD:
The south-west monsoon which provides over 75% of the annual rainfall over India has been consistently arriving late and taking longer time to withdraw from different parts of India. As a result, rains are spilling over to mid-October.
Case for revision
Too old to follow: The fact is that we cannot use the climatology of 1940s for informing people about the weather in 2020.
Changing Precipitation Patterns: IMD data shows that over several previous years, nearly 95 per cent of monsoon precipitation in 22 major cities of the country had happened over a period of just three to 27 days.
Changing patterns of regional variations in rainfall: Areas that have traditionally received plenty of rainfall are often remaining dry, while places that are not expected to get a lot of monsoon rain have sometimes been getting flooded.
Climate change could be one of the factors driving these changes, but there could be other reasons as well.
Answer:
hi, Good night.
please please please please please mark my answer the brainliest.