今年热浪不断，入冬不冷，科学家好像发现了原因
<p><span word="Scientists">Scientists</span> <span word="have">have</span> <span word="discovered">discovered</span> <span word="a">a</span> <span word="new">new</span> <span word="link">link</span> <span word="between">between</span> <span word="a">a</span> <span word="pattern">pattern</span> <span word="of">of</span> <span word="fluctuations">fluctuations</span> <span word="in">in</span> <span word="jet">jet</span> <span word="stream">stream</span> <span word="air">air</span> <span word="currents">currents</span> <span word="and">and</span> <span word="crippling">crippling</span> <span word="heatwaves">heatwaves</span> <span word="that">that</span> <span word="strike">strike</span> <span word="in">in</span> <span word="multiple">multiple</span> <span word="regions">regions</span> <span word="of">of</span> <span word="the">the</span> <span word="world">world</span> <span word="at">at</span> <span word="the">the</span> <span word="same">same</span> <span word="time">time</span>.</p><p>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。</p><p><span word="Rossby">Rossby</span> <span word="waves">waves</span> <span word="are">are</span> <span word="an">an</span> <span word="atmospheric">atmospheric</span> <span word="and">and</span> <span word="oceanic">oceanic</span> <span word="phenomenon">phenomenon</span> <span word="where">where</span> <span word="giant">giant</span> <span word="meanders">meanders</span> <span word="warp">warp</span> <span word="the">the</span> <span word="flow">flow</span> <span word="of">of</span> <span word="currents">currents</span> <span word="in">in</span> <span word="a">a</span> <span word="wave">wave</span>-<span word="like">like</span> <span word="pattern">pattern</span>. <span word="They">They</span> <span word="don">don</span>'<span word="t">t</span> <span word="only">only</span> <span word="occur">occur</span> <span word="on">on</span> <span word="Earth">Earth</span>, <span word="but">but</span> <span word="when">when</span> <span word="they">they</span> <span word="do">do</span>, <span word="they">they</span>'<span word="re">re</span> <span word="known">known</span> <span word="to">to</span> <span word="influence">influence</span> <span word="our">our</span> <span word="planet">planet</span>'<span word="s">s</span> <span word="weather">weather</span>.</p><p>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。</p><p><span word="Now">Now</span>, <span word="the">the</span> <span word="extent">extent</span> <span word="of">of</span> <span word="that">that</span> <span word="influence">influence</span> <span word="is">is</span> <span word="becoming">becoming</span> <span word="clearer">clearer</span>. <span word="In">In</span> <span word="a">a</span> <span word="new">new</span> <span word="study">study</span>, <span word="researchers">researchers</span> <span word="have">have</span> <span word="found">found</span> <span word="that">that</span> <span word="when">when</span> <span word="certain">certain</span> <span word="amplified">amplified</span> <span word="wavelengths">wavelengths</span> <span word="take">take</span> <span word="shape">shape</span> <span word="in">in</span> <span word="jet">jet</span> <span word="streams">streams</span> – <span word="fast">fast</span>-<span word="flowing">flowing</span> <span word="air">air</span> <span word="currents">currents</span> <span word="that">that</span> <span word="course">course</span> <span word="through">through</span> <span word="the">the</span> <span word="sky">sky</span> <span word="at">at</span> <span word="high">high</span> <span word="altitudes">altitudes</span> – <span word="the">the</span> <span word="phenomenon">phenomenon</span> <span word="is">is</span> <span word="linked">linked</span> <span word="to">to</span> <span word="the">the</span> <span word="emergence">emergence</span> <span word="of">of</span> <span word="concurrent">concurrent</span> <span word="heatwaves">heatwaves</span> <span word="that">that</span> <span word="devastate">devastate</span> <span word="food">food</span>-<span word="producing">producing</span> <span word="regions">regions</span>.</p><p>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。</p><p>"<span word="We">We</span> <span word="found">found</span> <span word="a">a</span> 20-<span word="fold">fold</span> <span word="increase">increase</span> <span word="in">in</span> <span word="the">the</span> <span word="risk">risk</span> <span word="of">of</span> <span word="simultaneous">simultaneous</span> <span word="heatwaves">heatwaves</span> <span word="in">in</span> <span word="major">major</span> <span word="crop">crop</span>-<span word="producing">producing</span> <span word="regions">regions</span> <span word="when">when</span> <span word="these">these</span> <span word="global">global</span>-<span word="scale">scale</span> <span word="wind">wind</span> <span word="patterns">patterns</span> <span word="are">are</span> <span word="in">in</span> <span word="place">place</span>," <span word="says">says</span> <span word="Earth">Earth</span> <span word="systems">systems</span> <span word="researcher">researcher</span> <span word="Kai">Kai</span> <span word="Kornhuber">Kornhuber</span> <span word="from">from</span> <span word="Columbia">Columbia</span> <span word="University">University</span>.“</p>
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