地区极端天气与大气变化有关-凯发k8官网

地区极端天气与大气变化有关
文章来源:未知 文章作者:enread 发布时间:2014-06-24 06:22 字体: [ ] 
(单词翻译:双击或拖选)
variations in high-altitude wind patterns expose particular parts of europe, asia and the us to different extreme weather conditions, a new study has shown. changes to air flow patterns around the northern hemisphere are a major influence on prolonged 1(发作,来回一次) of unseasonal weather -- whether it be hot, cold, wet or dry.
 
the high altitude winds normally blow from west to east around the planet, but do not follow a straight path. the flow 2 to the north and south, in a wave-like path.
 
these wave patterns are responsible for sucking either warm air from the tropics, or cold air from the arctic, to europe, asia, or the us. they can also influence rainfall by 3 rain-laden storms.
 
pioneering new research, carried out by the university of exeter and the university of melbourne, has shown that the development of these wave patterns leaves certain northern hemisphere regions more 4 to different types of prolonged, extreme weather.
 
dr james screen, a mathematics research fellow at the university of exeter and lead author of the study, said: "the impacts of large and slow moving 5 waves are different in different places. in some places 6 waves increase the chance of unusually hot conditions, and in others the risk of cold, wet or dry conditions."
 
the study showed that larger waves can lead to droughts in central north america, europe and central asia, and western asia exposed to prolonged wet spells(雨季). it also shows western north america and central asia are more 7 to heat waves, while eastern north america is more likely to experience prolonged outbreaks of cold.
 
the collaborative study used 8 land-based climate observations to identify episodes of abnormal temperature and rainfall from 1979-2012 and then examined the wave patterns during these events.
 
co-author professor ian simmonds, from the school of earth sciences at the university of melbourne, said the weather extremes they examined were month-long heat waves, cold spells(春寒期), droughts and prolonged wet periods, which occurred over large areas.
 
he said: "the study revealed that these types of events are strongly related to well-developed wave patterns, and that these patterns increase the chance of heat waves in western north america and central asia, cold outbreaks in eastern north america, droughts in central north america, europe and central asia, and wet spells in western asia.
 
"the findings are very important for decision 9 in assessing the risk of, and planning for the impacts of, extreme weather events in the future."


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1 2abe9936190c45115a3f6a38efb27c43     
n.拳击(或摔跤)比赛( bout的名词复数 );一段(工作);(尤指坏事的)一通;(疾病的)发作
参考例句:
  • for much of his life he suffered from recurrent bouts of depression. 他的大半辈子反复发作抑郁症。 来自《简明英汉词典》
  • it was one of fistiana's most famous championship bouts. 这是拳击界最有名的冠军赛之一。 来自《现代英汉综合大词典》
2 7964da4b1e5447a140417a4f8c3af48b     
曲径( meander的名词复数 ); 迂回曲折的旅程
参考例句:
  • the stream meanders slowly down to the sea. 这条小河弯弯曲曲缓慢地流向大海。
  • a brook meanders through the meadow. 一条小溪从草地中蜿蜒流过。
3 3hrzbi     
n.操舵装置
参考例句:
  • he beat his hands on the steering wheel in frustration. 他沮丧地用手打了几下方向盘。
  • steering according to the wind, he also framed his words more amicably. 他真会看风使舵,口吻也马上变得温和了。
4 4rrw7     
adj.过敏的,敏感的;易动感情的,易受感动的
参考例句:
  • children are more susceptible than adults.孩子比成人易受感动。
  • we are all susceptible to advertising.我们都易受广告的影响。
5 6eayr     
adj.大气的,空气的;大气层的;大气所引起的
参考例句:
  • sea surface temperatures and atmospheric circulation are strongly coupled.海洋表面温度与大气环流是密切相关的。
  • clouds return radiant energy to the surface primarily via the atmospheric window.云主要通过大气窗区向地表辐射能量。
6 d305c65f3ed83c07379c830f9ade119d     
放大,扩大( amplify的过去式和过去分词 ); 增强; 详述
参考例句:
  • he amplified on his remarks with drawings and figures. 他用图表详细地解释了他的话。
  • he amplified the whole course of the incident. 他详述了事件的全过程。
7 50bzu     
adj.(to)易于…的,很可能…的;俯卧的
参考例句:
  • some people are prone to jump to hasty conclusions.有些人往往作出轻率的结论。
  • he is prone to lose his temper when people disagree with him.人家一不同意他的意见,他就发脾气。
8 xunzms     
adj.详细的,详尽的,极注意细节的,完全的
参考例句:
  • he had made a detailed study of the terrain.他对地形作了缜密的研究。
  • a detailed list of our publications is available on request.我们的出版物有一份详细的目录备索。
9 22a4efff03ac42c1785d09a48313d352     
n.制造者,制造商(maker的复数形式)
参考例句:
  • the makers of the product assured us that there had been no sacrifice of quality. 这一产品的制造商向我们保证说他们没有牺牲质量。
  • the makers are about to launch out a new product. 制造商们马上要生产一种新产品。 来自《简明英汉词典》
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