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
外语
Global climate change, often seen as a process stretching over thousands of years, could in fact occur abruptly and unexpectedly
Global climate change, often seen as a process stretching over thousands of years, could in fact occur abruptly and unexpectedly
admin
2012-08-22
75
问题
Global climate change, often seen as a process stretching over thousands of years, could in fact occur abruptly and unexpectedly-—quickly pushing up temperatures by as much as 18 degrees Fahrenheit and wreaking havoc (大破坏,浩劫) on human society, scientists warned on Wednesday.
"Climate change is not always smooth. Sometimes it is abrupt," said Richard Alley, a climate expert at Pennsylvania State University and lead author of a new National Academy of Sciences report on the threat of rapid climatic shifts.
"If you have a very large, abrupt change, a lot of people and a lot of ecosystems are going to notice," he said. "The bigger and faster it is, the harder it will be to deal with. "
The new National Academy of Sciences report, released this week, warns that gradual global warming coupled with other human impacts on the environment could "trip the switch" for sudden climate change.
At the American Geophysical Union meeting on Wednesday, Alley and other environmental scientists said the geological evidence indicated that such rapid climate shifts had occurred frequently in the past—moving temperatures drastically in the space of just a few decades.
"This can happen in less than a human generation, and then it will persist for thousands of years," said David Battisti, an atmospheric scientist at the University of Washington.
The most immediate dangers posed by abrupt climate change range are devastating droughts and floods which could seriously affect both water supply and agriculture across vast stretches of the planet.
Longer term impacts could include changes in the basic systems which determine regional global temperatures. Scientists believe that the Gulf Stream, a current (水流) of warm Atlantic water which now keeps much of Northern Europe temperate, could theoretically reverse direction if enough cool fresh water runs into the north Atlantic from melting ice, a change that would quickly impact European weather.
According to the National Academy of Science report, sudden climate change could be triggered (触发) by______.
选项
A、geological shifts
B、human impacts on the environment
C、natural disasters
D、long-term droughts
答案
B
解析
细节题。由第四段可知,气候的缓慢变化,加上人类对环境的其他影响,可能导致突然的气候变化。因此B是正确答案。
转载请注明原文地址:https://kaotiyun.com/show/GFXO777K
0
在职攻硕英语联考
相关试题推荐
Althoughthereareplansto______additionalpensions,thiswillnotaffectanyoneretiringbefore1998andwillonlymarginall
Peoplewho______largeamountsofanimalfatsaremorelikelytogetcancerandheartdisease.
Envyhasbecomeadrivewheelofourmodernworld.Itisthepassionthatgovernsoureconomiclife.Moderncapitalismrelieson
NewYear’sdetoxproductsthatpurporttoridthebodyofharmfulchemicalsaccumulatedthroughseasonalover-indulgenceareaw
Bartendersarerarelyshyaboutofferinganopinion.ButonarecenteveningattheFinboroughWineCafe,inbetweenpoursofBe
Foracertainbreedofconsumers,thearrivalofApple’snewgenerationiPadisanoccasionofmonomaniacalfocusandintensean
Ifacompanyisalreadyeffectively______itscompetitorsbecauseitprovidesservicethatavoidsadamagingreputationandkeeps
Duringrecentyearswehaveheardmuchabout"race":howthisracedoescertainthingsandthatracebelievescertainthingsand
Everytimeapersoneatssomethinghemakesanutritionaldecision.Heacceptsorrejectsthefoodavailabletohimathomefor
Thehousewasveryquiet,______asitwasonthesideofamountain.
随机试题
简述运动知觉的种类。
风心病心衰用洋地黄和利尿剂治疗,出现恶心、食欲不振,心电图为室性期前收缩二联律。下列哪一种情况最可能
《建设工程施工合同(示范文本)》GF—2013—0201规定属于发包人工作义务的是()。
与单件生产相比,大量生产()。
理论上,应当采用()的收益率得到收益率曲线,以此反映市场的实际利率期限结构。
指数平滑系数α一般选取()。
项目费用管理的基础是________。
根据迁移过程中所需的内在心理机制的不同,迁移可以分为()。
运动过程中最容易发生肌肉痉挛的肌肉是(),最容易发生肌肉痉挛的运动是()。
Onmyreturntotheofficethismorningafterbeingawayforafewdays,Ifoundyourkindinvitationofthe1stOctoberawaitin
最新回复
(
0
)