Which of the following factor is responsible for fluctuation in Monsoon in India?

The correct answer is If 2nd equatorial trough does not merge with ITCZ.

Key Points

• The Inter-Tropical Convergence Zone (ITCZ) is a key component of the monsoon system in India.
• The 2nd equatorial trough plays a crucial role in influencing the monsoon's onset and progress.
• When the 2nd equatorial trough does not merge with the ITCZ, it leads to fluctuations in monsoon patterns.
• This non-merging disrupts the formation of a unified low-pressure belt, affecting rainfall distribution across India.

Important Points

• The ITCZ generally shifts northwards during the summer, aligning with the Indian landmass and intensifying the monsoon.
• The merging of the 2nd equatorial trough ensures the establishment of strong monsoon currents.

Additional Information

• Southern Branch of South West Tropical Jet: This jet stream is crucial for the transportation of moisture from the Indian Ocean to the Indian subcontinent. However, its re-establishment over Northern India is typically associated with the withdrawal of monsoon rather than fluctuations.
• Southern Branch of Subtropical Westerly Jet Stream: The late disappearance of this jet stream can delay the retreat of monsoon rather than cause fluctuations during the active season.
• Low-Pressure Cell Over Tibetan Landmass: The development of a strong low-pressure system over Tibet typically aids monsoon currents rather than causing fluctuations.