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
For more than a decade, scientists have been trying to determine whether climate change is linked to intense storms, such as 200
For more than a decade, scientists have been trying to determine whether climate change is linked to intense storms, such as 200
admin
2012-06-02
58
问题
For more than a decade, scientists have been trying to determine whether climate change is linked to intense storms, such as 2005’s Hurricane Katrina. Meteorologist Michael Mann of Pennsylvania State University, and colleagues attacked the question by turning to the past. They looked through drill cores from coastal waters for signs that sediments had been disturbed by major storms. Eight sites along the U. S. East Coast and Puerto Rico provided a reliable record of the number of significant hurricanes going back about 1500 years. Other climate data and models added clues to water temperatures and hurricane intensity.
As the researchers report tomorrow in Nature, they found strong evidence that Atlantic hurricane activity peaked about 1000 years ago, producing up to 15 hurricanes a year on average — a level matched in recent times only over the past decade and a half. At the time, according to estimates constructed from other geologic data, Atlantic water temperatures were relatively warm, "though not as warm as today," Mann says. And Pacific temperatures were relatively cool, thanks to La Nina events. Warmer Atlantic waters whip up more storms, but warmer Pacific temperatures tend to create stronger jet streams that break up those storms. So the twin conditions a millennium ago produced kind of a "Perfect Storm" for hurricanes, he explains.
Of particular interest, the sediments reveal a close link between warmer water and the number of hurricanes during the past 150 years or so. Dropping temperatures produced seven or eight hurricanes a year, while a rising thermometer, such as in the earlier part of this decade, pushed the total to 15. "All other things being equal, " Mann says, "this suggests that we are indeed likely to see not only stronger hurricanes in the Atlantic but perhaps more of them" in the near future.
Meteorologist James Eisner of Florida State University in Tallahassee agrees with the findings, but adds a caveat. The historical data do show that a link between warmer ocean temperatures and higher hurricane frequencies has existed for at least 1500 years, he says. However, there’s a high degree of uncertainty in the data. That and the fact that the physics explaining the link haven’t yet been established, Eisner explains, "indicate this is not the ’ smoking gun’ we’ve been looking for that would allow us to confidently project what will happen as the oceans continue to warm. "
According to Michael Mann, Atlantic hurricane activity peaked about 1000 years ago because
选项
A、Atlantic waters got warmer and Pacific waters got cooler.
B、Atlantic waters got warmer and Pacific waters got warmer.
C、temperature difference between Atlantic and Pacific peaked.
D、water temperatures of Atlantic and Pacific nearly equaled.
答案
B
解析
事实细节题。文章中第二段第一句提到大西洋的飓风活动在1000年前达到了高峰期,第二段最后一句又提到了the twin conditions造成了这种现象。而the twin conditions指的是前一句提到的大西洋及太平洋海水变暖。由此可知选项[B]符合题意,其他选项都表述错误。
转载请注明原文地址:https://kaotiyun.com/show/ugp4777K
0
考研英语一
相关试题推荐
Inthefirstparagraph,theauthormentionsMcKendrickandPlumbmostprobablyinorderto_______.Inthethirdparagraph,the
Thekidswhogrewupon"StarTrek"can’tfind(1)_____wayaroundEarth.Americanscan(2)_____directtoEngland,butonly
Thekidswhogrewupon"StarTrek"can’tfind(1)_____wayaroundEarth.Americanscan(2)_____directtoEngland,butonly
BycitingexamplesofwomenemploymentinSweden,theauthorintendstoshowthatTheauthorwillprobablyagreewiththestate
BycitingexamplesofwomenemploymentinSweden,theauthorintendstoshowthatThestate-fundedchildcareandmaternitypol
WirelesstechnologyisintroducedasFromtheauthor’spointofview,theWi-Fitechnology
YouaresupposedtoinviteDr.Kingtomakeaspeechaboutthefuturedevelopmentofcomputerscienceattheannualconferenceo
WecanlearnfromthefirstparagraphthatBy"outragedrhetoric"(Paragraph3),theauthoristalkingabout
EuthanasiahasbeenatopicofcontroversyinEuropesinceatleast1936.@Onanaverageofsixtimesaday,adoctorinHolland
America’sFederalReservecutinterestratesbyanotherquarter-point,to3.75%.WallStreet,whichhadbeen(1)_____forasixt
随机试题
18世纪至19世纪70年代是自由贸易政策蓬勃发展时期,自由竞争时期自由贸易的主要结论包括()
我国医学伦理学基本原则的主要内容不包括
心室肌细胞区别于神经或骨骼肌细胞动作电位的主要特征是
患儿,女,8岁。因多饮、多尿、多食,体重下降,被诊断为1型糖尿病,用胰岛素治疗,最近在运动后出现心悸、出汗等症状,应该调整的治疗是
某容器中含氨0.32mol、氧0.18mol、氮0.70mol,总压强为100kPa时,氨、氧、氮的分压强分别为:
个人汽车贷款实行“设定担保、分类管理、特定用途”的原则。()[2014年11月真题]
增值税纳税人包括在中华人民共和国境内销售货物或者提供劳务加工,修理修配劳务,销售服务,无形资产或者不动产,以及()。
根据企业破产法的规定,下列关于债权人委员会的表述中,正确的,是()。
注册会计师在确定应收账款函证数量的大小、范围时,应考虑的主要因素是()。
根据《行政复议法》规定,下列规范性文件中,行政相对人在对根据该规范性文件作出的具体行政行为提起行政复议的同时,可以一并向行政复议机关提出对该规范性文件进行审查申请的是()。
最新回复
(
0
)