Scientists have discovered a new link between a pattern of fluctuations in jet stream air currents and crippling heatwaves that strike in multiple regions of the world at the same time.

科学家发现喷流的波动模式和同时袭击世界上多个地区的严重热浪之间的新联系。

Rossby waves are an atmospheric and oceanic phenomenon where giant meanders warp the flow of currents in a wave-like pattern. They don't only occur on Earth, but when they do, they're known to influence our planet's weather.

罗斯贝波是一种大气和海洋现象，巨大的蜿蜒曲折会使气流呈波浪状弯曲。它们不仅会发生在地球上，而且已知出现的时候会影响地球的天气。

Now, the extent of that influence is becoming clearer. In a new study, researchers have found that when certain amplified wavelengths take shape in jet streams – fast-flowing air currents that course through the sky at high altitudes – the phenomenon is linked to the emergence of concurrent heatwaves that devastate food-producing regions.

现在，这种影响的程度越来越明显。在一项新的研究中，研究员发现，当特定的放大波长在喷流--高海拔时经过天空的快速流动的气流--中成形时，这种现象与同时出现的破坏食品生产地区的热浪有关。

"We found a 20-fold increase in the risk of simultaneous heatwaves in major crop-producing regions when these global-scale wind patterns are in place," says Earth systems researcher Kai Kornhuber from Columbia University.“

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