Effects of El Nino in Chennai and other parts of the world

El Nino is a climate phenomenon that occurs when the surface waters of the Pacific Ocean become warmer than usual, affecting the atmospheric circulation and weather patterns around the world1. One of the effects of El Nino is that it can cause extreme rainfall events in some regions, such as the coastal areas of Tamil Nadu in India. El Nino has significant effects on the weather patterns in Chennai. 

Here are some key points:

Extreme Rain Spells

A joint study by the Department of Physics at Anna University and the Chennai Institute of Technology predicts that Tamil Nadu’s coastline, which includes Chennai, will experience erratic and extreme rain spells until 2030 due to the El Nino effect. This is a result of global warming and can lead to unexpected rain spells, causing flooding in some areas1.

Infrastructure Concerns

The study also raised concerns about the city’s infrastructure, which may be inadequate to handle such heavy rainfall1. After heavy rain spells in November, some streets in Chennai were inundated for a week.

Historical Impact

The extreme El Nino conditions in 2015 contributed to the unprecedented heavy rainfall witnessed in Chennai for three days from November 30 to December 2, 20152.

Future Predictions

Climate experts predict that the El Nino impact on the North East monsoon, which supplies 60% of Tamil Nadu’s annual water requirement, could result in historic rainfall.

Predictions based on current data and models, and actual conditions may vary. It’s always a good idea to stay updated with the latest weather forecasts and advisories.

How does it affects other parts of the world?

El Nino has a significant impact on global weather patterns and ecosystems. Here are some of its effects around the world:

Climate Imbalances

During an El Nino year, the trade winds divert from their normal direction, creating imbalances in climate and the food chain.

Extreme Weather Events

El Nino can trigger extreme weather events globally, including fierce droughts, wildfires, heatwaves, deadly flooding, and tropical storms.

Economic Impact

The global economic fallout of El Nino is substantial. A recent study estimated costs as high as $3.4 trillion.

Impact on Ecosystems

The extended period of warmth in the Pacific Ocean leads to higher global temperatures, which can impact weather patterns, ecosystems, and economies.

Agriculture and Food Supply

In the years it strikes, El Nino can result in devastating floods, crop-killing droughts, plummeting fish populations, and an uptick in tropical diseases.

General effects and the actual impact can vary depending on the intensity of the El NiƱo event and the specific geographical location. 

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