首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
It seems to happen with depressing frequency—sunny skies turn to rain just as the weekend arrives. Now Spanish researchers say t
It seems to happen with depressing frequency—sunny skies turn to rain just as the weekend arrives. Now Spanish researchers say t
admin
2015-07-13
85
问题
It seems to happen with depressing frequency—sunny skies turn to rain just as the weekend arrives. Now Spanish researchers say they have evidence that in some parts of Europe the weather really does follow a weekly cycle, although not in the straightforward way that the anecdote might suggest.
Evidence has been mounting over the years that the weather in certain partsof the world, including the US, Japan and China, can be driven by the weekly cycle of human activity. This is because we tend to produce more air pollution during the week and less at the weekend. Evidence that such an effect occurs in Europe is controversial and has been harder to come by. Arturo Sanchez-Lorenzo of the University of Barcelona, Spain, and his colleagues examined data gathered between 1961 and 2004 from weather stations across Spain to see whether such a pattern existed. They claim to have found it in Spain, as well as hints of weekly changes in air circulation more broadly over Western Europe.
The result is puzzling, but it is known that airborne pollutants produced by human activity can affect the weather in a variety of ways. For example, particles can be heated by absorbing sunlight, which in turn heats the air and changes air circulation patterns. Pollutant particles can also provide seeds for cloud formation. Exactly which effect has the greatest influence seems to depend on conditions that vary season by season. They also found signs that air pressure in Western Europe tends to be lower midweek than at the weekend in data from a global database. This suggests that the human influence on weather goes beyond known local effects, says team member Josep Calbo of the University of Girona in Spain.
However, it is not clear whether the team’s findings are statistically significant, says Thomas Bell of NASA’s Goddard Space Flight Center in Greenbelt, Maryland, who was part of a team that found a stronger weekly cycle in the US. "This whole enterprise of looking for weekly cycles is rife with possibilities for misleading oneself."
Why a weekly cycle would be less noticeable in Europe than in the US and Asia is still unknown. No weekly cycle has ever been found in the UK, probably because the weather is dominated by large systems blowing in from the Atlantic Ocean. These larger systems may be harder for weekly pollution cycles to influence, points out Douglas Maraun of the University of East Anglia in Norwich, who studies UK precipitation. "I doubt that there is a weekly influence of human activity on such a large weather system," he says.
Airborne pollutants can affect _____.
选项
A、sunlight absorption
B、air circulation
C、cloud movement
D、human activities
答案
B
解析
事实细节题。第三段分析了空气携带的污染物以各种方式影响天气。第二句中的particles对应第一句的pollutants,which引导的定语从句表明,微尘会影响空气循环模式,B项符合。
转载请注明原文地址:https://kaotiyun.com/show/Eq74777K
0
考研英语一
相关试题推荐
[A]Whattodoasastudent?[B]Variousdefinitionsofplagiarism.[C]Ideasshouldalwaysbesourced.[D]Ignorancecanbeforgive
Publicimagereferstohowacompanyisviewedbyitscustomers,suppliers,andstockholders,bythefinancialcommunity,bythe
Publicimagereferstohowacompanyisviewedbyitscustomers,suppliers,andstockholders,bythefinancialcommunity,bythe
TheStudents’UnionoftheSchoolofEconomiesisgoingtohaveaseminaronthephenomenonofwastefulhabitsoncampus.Youa
Inthelate1960’s,manypeopleinNorthAmericaturnedtheirattentiontoenvironmentalproblems,andnewsteel-and-glassskysc
TheUnitedStatesinthe1990shashadsevenyearsofeconomicboomwithlowunemployment,lowinflation,andlowgovernmentdef
Toparaphrase18th-centurystatesmanEdmundBurke,"allthatisneededforthetriumphofamisguidedcauseisthatgoodpeople
ResearchersledbyNewYorkUniversityneuroscientistJosephLeDouxrecentlyclaimedtobethefirstscientiststoeraseasingl
Thepastyearortwohastestedtheideathatallpublicityisgoodpublicity,atleastwhenitcomestobusiness.Undeservedbo
Thepastyearortwohastestedtheideathatallpublicityisgoodpublicity,atleastwhenitcomestobusiness.Undeservedbo
随机试题
“振兴中华”这四个字(1)有_____个音节;(2)含有后鼻音韵母的字是_____;(3)含有翘舌音的字是_____;(4)含有塞擦音的字是_____;(5)含有擦音的是_____;(6)属于齐齿呼的字是_____。
设函数f(x)在[a,b]连续,在(a,b)可导,f’(x)>0.若f(a).f(b)<0,则y=f(x)在(a,b)().
2.马克思主义哲学最主要、最显著的特征是()。
下列疾病与症状除哪项外,均可见到周围血管征
面积量算方法一般分为解析法和()。
已知点A(1,2),B(-2,-2),若直线l:y=k(χ+1)-1与线段AB相交,则k的取值范围是().
跨学科课程
_______被称为“20世纪的良心”。
下列给定程序中函数fun的功能是:判断一个整数是否为素数,若是素数返回l,否则返回0。在main函数中,若fun返回1输出YES,若fun返回0输出NO!。请改正程序中的错误,使它能得出正确的结果。注意:不要改动main函数,
已知intDBL(intn){returnn+n;}和longDBL(longn){returnn+n)是一个函数模板的两个实例,则该函数模板的定义是【】。
最新回复
(
0
)