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Understanding Long-term Climate Patterns

3 weeks ago
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Teleconnections are large-scale climate phenomena linking distant regions of the Earth's atmosphere and oceans. They influence weather patterns and climate variability across different parts of the globe.

Interactions between atmospheric circulation patterns, sea surface temperatures, and other climatic variables on regional and global scales cause them.

They play essential roles in modulating weather and climate conditions worldwide. They can lead to climate anomalies, such as temperature extremes, precipitation anomalies and atmospheric pressure changes, over vast distances.

When forecasters understand them, they can better predict the weather, especially extreme weather events and long-term climate trends.

Learning about them allows forecasters to improve climate models, helping people learn to adapt to changing weather better.

El Niño-Southern Oscillation

The El Niño-Southern Oscillation is a climate pattern where the Pacific Ocean gets warmer in some areas and cooler in others.

During El Niño, warmer waters in the central and eastern Pacific lead to heavy rainfall in places like Peru, causing floods and landslides.

It brings drought to other areas, like Australia, leading to crop failures and water shortages.

On the other hand, during La Niña, cooler water in the Pacific often brings drought to parts of South America, leading to reduced agricultural productivity. La Nina can lead to more rainfall in the western Pacific.

Therefore, it often floods in Southeast Asia.

For example, there was a particularly strong El Nino Southern Oscillation in 1983 and 1984.

In Australia, wheat production fell by over 40%. This caused substantial livestock losses as crops were unavailable to feed the animals.

Meanwhile, commercial anglers were harmed in Indonesia as fish did not reproduce as much in warmer ocean water.


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