From record-breaking spring heat over south-eastern Australia to flooding rains in Greece and Spain, the jet stream has had a lot to answer for recently. Here's what it is and how it works.
Despite being located well above the surface, the jet stream directly impacts the weather on the ground in a number of ways, particularly in southern Australia, according to Monash University and ARC Centre of Excellence for Climate Extremes meteorologist Michael Barnes.
At times — when it breaks — it can also lead to weather systems being stuck over one location for days on end, leading to extreme heat or rain.while heat built over the UK.However Dr Barnes said the waves propagating along the jet occasionally became amplified to the point when they "break" like waves in the ocean.
He was right. But it wasn't until the 1940s, in the midst of World War II, that the knowledge of the jet stream really took hold. Meanwhile the Japanese, who had learnt of the winds decades earlier, were attempting to use the jet stream as a weapon, albeit with not much success.
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