内华达山积雪层2019年才能恢复
文章来源:未知 文章作者:enread 发布时间:2016-06-23 08:02 字体: [ ]  进入论坛
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Even with this winter's strong El Niño, the Sierra Nevada snowpack will likely take until 2019 to return to pre-drought levels, according to a new analysis led by UCLA hydrology researchers. Additionally, they suggest their new method, which provided unprecedented1 detail and precision, could be useful in characterizing water in the snowpack in other mountains, including ranges in western North America, the Andes or the Himalayas. These areas currently have much less on-site monitoring than in the Sierra Nevada.
 
The study was published online today in The American Geophysical Union journal Geophysical Research Letters.
 
"With the consecutive2 years of ongoing3 drought, the Sierra Nevada snowpack's total water volume is in deficit4 and our analysis shows it will to take a few years for a complete recovery, even if there are above-average precipitation years," said the study's principal investigator5, Steve Margulis, professor of civil and environmental engineering at the UCLA Henry Samueli School of Engineering and Applied6 Science.
 
Much of California's water comes from the when the Sierra Nevada snowpack melts. The winter of 2015 capped four consecutive years of drought that resulted in the largest cumulative7 drought deficit spanning the 65 years that have been examined. The water volume of the snowpack in 2015 was just 2.9 cubic kilometers, when a typical year is about 18.6 cubic kilometers.
 
"It is critical for regions like California, that rely on their regional snowpack for water supply, to understand the dynamics8 of the system," Margulis said. "Our new tool could help not just California, but other regions, gain insight about their regional snowpack."


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1 unprecedented 7gSyJ     
adj.无前例的,新奇的
参考例句:
  • The air crash caused an unprecedented number of deaths.这次空难的死亡人数是空前的。
  • A flood of this sort is really unprecedented.这样大的洪水真是十年九不遇。
2 consecutive DpPz0     
adj.连续的,联贯的,始终一贯的
参考例句:
  • It has rained for four consecutive days.已连续下了四天雨。
  • The policy of our Party is consecutive.我党的政策始终如一。
3 ongoing 6RvzT     
adj.进行中的,前进的
参考例句:
  • The problem is ongoing.这个问题尚未解决。
  • The issues raised in the report relate directly to Age Concern's ongoing work in this area.报告中提出的问题与“关心老人”组织在这方面正在做的工作有直接的关系。
4 deficit tmAzu     
n.亏空,亏损;赤字,逆差
参考例句:
  • The directors have reported a deficit of 2.5 million dollars.董事们报告赤字为250万美元。
  • We have a great deficit this year.我们今年有很大亏损。
5 investigator zRQzo     
n.研究者,调查者,审查者
参考例句:
  • He was a special investigator for the FBI.他是联邦调查局的特别调查员。
  • The investigator was able to deduce the crime and find the criminal.调查者能够推出犯罪过程并锁定罪犯。
6 applied Tz2zXA     
adj.应用的;v.应用,适用
参考例句:
  • She plans to take a course in applied linguistics.她打算学习应用语言学课程。
  • This cream is best applied to the face at night.这种乳霜最好晚上擦脸用。
7 cumulative LyYxo     
adj.累积的,渐增的
参考例句:
  • This drug has a cumulative effect.这种药有渐增的效力。
  • The benefits from eating fish are cumulative.吃鱼的好处要长期才能显现。
8 dynamics NuSzQq     
n.力学,动力学,动力,原动力;动态
参考例句:
  • In order to succeed,you must master complicated knowledge of dynamics.要取得胜利,你必须掌握很复杂的动力学知识。
  • Dynamics is a discipline that cannot be mastered without extensive practice.动力学是一门不做大量习题就不能掌握的学科。
TAG标签: drought Nevada snowpack
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