According to projections from most climate dynamical models, the Northeast Monsoon (NEM) in Tamil Nadu is expected to be erratic and above normal this year. Experts indicate that the monsoon could become 'very strong' by September and October, just ahead of its typical onset.
Model Projections and Timing
The forecasts, based on multiple climate dynamical models, suggest a significant intensification of monsoon conditions in the pre-onset period. This development is likely to influence the overall rainfall pattern during the NEM season, which typically spans from October to December.
Erratic behavior means that while total rainfall may be above normal, its distribution could be uneven, leading to both flood risks in some areas and potential deficits in others.
Impact on Tamil Nadu
Tamil Nadu relies heavily on the Northeast Monsoon for its annual water requirements, as it accounts for nearly 48% of the state's total rainfall. An erratic and above-normal monsoon poses challenges for agriculture, water management, and disaster preparedness.
Experts advise farmers and authorities to prepare for extreme weather events, including heavy downpours and possible flooding, especially in coastal districts like Chennai.
Role of El Nino
The development of El Nino conditions in the Pacific Ocean is also a factor influencing the monsoon. While El Nino typically suppresses the Southwest Monsoon, its effect on the Northeast Monsoon can be variable, sometimes enhancing rainfall. The interplay between El Nino and local atmospheric conditions will be critical in determining the exact rainfall distribution.
As the onset approaches, continuous monitoring and updated forecasts will be essential for effective planning.
