El Niño May Become the Strongest Event Since 1950
Context
The U.S. National Oceanic and Atmospheric Administration (NOAA) has indicated that the ongoing El Niño episode could intensify into one of the strongest recorded since 1950, raising concerns over its possible impact on India’s southwest monsoon and overall climate.
Facts
- According to NOAA, there is an 81% likelihood of a strong El Niño developing during the October-December period, driven by continued warming of sea surface temperatures in the equatorial Pacific.
- Experts have observed strengthening interactions between the Pacific Ocean and the atmosphere, increasing the probability of prolonged and widespread climatic disturbances.
- The India Meteorological Department (IMD) has cautioned that an intense El Niño could suppress the southwest monsoon, with northwestern and central India likely to experience the greatest impact.
- Historical episodes, particularly the 2015-16 El Niño, were associated with below-normal rainfall, drought conditions, heatwaves, and adverse effects on agricultural productivity across India.
Key Concepts
- El Niño is the warm phase of the El Niño-Southern Oscillation (ENSO), marked by an unusual rise in sea surface temperatures over the central and eastern equatorial Pacific Ocean.
- Strong El Niño events often weaken the Indian summer monsoon by altering atmospheric circulation patterns and disrupting the transport of moisture towards the Indian subcontinent.
- ENSO is one of the most significant drivers of global climate variability, influencing rainfall distribution, tropical cyclones, droughts, floods, and heatwaves across different regions.
- Building climate-resilient agriculture, strengthening seasonal forecasting systems, and improving disaster preparedness are essential to minimise the socio-economic impacts associated with ENSO events.