weather patterns

Polar vortex responsible for Texas deep freeze, warm Arctic temperatures

A “polar vortex” was responsible for the freezing conditions in the US state of Texas last month, UN weather experts said on Tuesday, before warning of a worrying increase in global carbon dioxide levels.

After nearly a decade away, La Niña weather system is back…

Many will be familiar with El Niño – the ocean-warming phenomenon that affects global weather patterns – but how about La Niña, which is linked to cooler sea temperatures? 

Forecast points to La Niña weather change

Global weather patterns could be about to change if the La Niña phenomenon re-emerges, UN experts said Thursday.

La Niña, which is caused by cooler waters in the Pacific Ocean, could bring much-needed rainfall to areas left parched by the last El Niño episode, which ended in May.

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