El Niño Develops Over Pacific, IMD Flags Possible Impact On Monsoon

The India Meteorological Department (IMD) on Friday confirmed the onset of El Niño conditions over the equatorial Pacific Ocean, warning that the climate phenomenon is likely to intensify during the ongoing southwest monsoon season and could influence rainfall patterns across India. In its latest El Niño Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) bulletin, the IMD said that sea surface temperatures in the central tropical Pacific have crossed the El Niño threshold, while atmospheric indicators have also begun aligning with the warming trend.

The agency noted that the ocean–atmosphere system is now exhibiting characteristics consistent with a developing El Niño event. According to the bulletin, the current conditions are expected to strengthen further in the coming months, particularly during the peak monsoon period. El Niño events are typically associated with reduced rainfall over large parts of the Indian subcontinent, raising concerns about potential impacts on agriculture, water resources, and rural livelihoods that depend heavily on seasonal rains.

The IMD stated that the atmospheric response to warming Pacific waters has become more pronounced, confirming that the coupled system has transitioned into El Niño conditions. Meteorologists will continue to monitor its intensity and interaction with other climatic drivers, including the Indian Ocean Dipole, which can either offset or amplify monsoon variability. The announcement follows a similar assessment from international meteorological agencies, including the Japan Meteorological Agency, which earlier reported that El Niño-like conditions were already visible in both oceanic and atmospheric parameters.  However, India’s weather office had until recently indicated that the system was close to threshold levels before issuing its formal confirmation.

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Climate experts note that while El Niño does not uniformly determine monsoon performance every year, its presence increases the probability of below-normal rainfall in several regions. The final monsoon outcome depends on multiple interacting factors, including regional sea surface temperatures and intra-seasonal variability. With the southwest monsoon currently underway, the IMD’s confirmation is expected to be closely watched by policymakers and the agriculture sector, as any sustained weakening of rainfall could have broader implications for food production, inflation, and water availability across the country.

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