How El Niño and La Niña affect food and energy
Changes in Pacific temperatures alter the climate in many regions, with effects on crops, water and energy.
Goal: to understand how El Niño and La Niña, climate phenomena tied to Pacific Ocean temperature, can influence food production and the energy sector, and how to follow the forecasts. This text is informational and makes no price forecast.
Requirements
- Access to bulletins from weather and climate services.
- An understanding that effects vary by region and time of year.
- Awareness that each event has its own intensity and impacts.
What they are
They are part of a natural cycle known as ENSO. In El Niño, the waters of the central and eastern equatorial Pacific become warmer than normal; in La Niña, colder. These changes alter wind and rainfall patterns in several parts of the world, although the specific effects depend on the region, the season and the intensity of the event.
Impact channels
- Rain and drought. Some regions tend to get more rain in one of the phenomena and less in the other, which affects grain, coffee, sugarcane, rice and other crops.
- Temperature. Heat or cold waves can harm plants and animals.
- Water and electricity. In countries that rely on hydroelectric plants, less rain reduces generation and can raise the cost of other sources.
- Energy demand. Extreme temperatures change heating and cooling use.
- Fishing and supply chains. Changes in currents and weather affect fishing and transport.
- Prices. When food supply is affected, prices tend to react, together with other factors such as stocks and exchange rates.
Concrete steps to follow
- Check your country's weather service bulletin and those of international climate bodies.
- See the current stage: neutral, El Niño or La Niña, and the probability for the coming months.
- Look for impacts on your region, not only general ones.
- Follow the harvest of products you care about, in reports from agricultural agencies.
- Watch the energy situation in statements from electricity system operators.
- Take care with interpretation. Forecasts are probabilities, and other factors act at the same time.
Limits
Not every El Niño or La Niña has the same effect, and extreme weather events can occur unrelated to them. Avoid concluding that a phenomenon "causes" a price or a blackout: it is one factor among several.
Summary
El Niño and La Niña change the climate of several regions and, for that reason, can affect crops, water and energy. Following official bulletins and looking at the regional impact helps in understanding the news, without treating forecasts as certainties.
