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
In recent days, American Airlines has been forced to cancel more than 40 flights in Phoenix. The reason: With daytime highs hove
In recent days, American Airlines has been forced to cancel more than 40 flights in Phoenix. The reason: With daytime highs hove
admin
2022-01-20
82
问题
In recent days, American Airlines has been forced to cancel more than 40 flights in Phoenix. The reason: With daytime highs hovering around 120 degrees, it was simply too hot for some smaller jets to take off. Hotter air is thinner air, which makes it more difficult—and sometimes impossible—for planes to generate enough lift. As the global climate changes, disruptions like these are likely to become more frequent, researchers say, potentially making air travel costlier and less predictable with a greater risk of injury to travelers from increased turbulence.
"We tend to ignore the atmosphere and just think that the plane is flying through empty space, but of course, it’s not," said Paul D. Williams, a professor in the Department of Meteorology at the University of Reading in Britain. "Airplanes do not fly through a vacuum. The atmosphere is being modified by climate change." The problem in Phoenix primarily affected smaller jets operated by American’ s regional partner airlines.
"When you get in excess of 118 or higher, you’re not able to take off or land," said Ross Fein-stein, a spokesman for American Airlines, referring to the smaller aircraft. Bigger jets like Boeing 737s and Airbus A320s have higher operating thresholds (126 and 127 degrees, respectively), he said. But even though bigger planes weren’t affected, he added, American decided to give passengers on any flight to or from Phoenix the option to change their trips.
Overall, that means more than 350 flights were potentially affected by the hot weather in Phoenix. Robert Mann, the president of airline industry analysis firm R.W. Mann & Co., said that although airlines were working to become more efficient now, they were not doing much to prepare for the longer-term effects of climate change. "In a world where they’re focused on near-term issues, the glacial rate of environmental change is not within their fleet-planning horizon," he said.
Researchers are just beginning to explore how climate change affects aviation and planes’ ability to fly. Because there is so little data available and so many factors at play—aircraft design, airport size and location, the weight of passengers and cargo, to name just a few—it can be hard to attribute any one service disruption to global warming.
Depending on their locations, airports may experience the effects differently. La Guardia has a short runway relative to other major commercial airports, and on particularly hot days that can be a problem: Planes might not have enough distance to achieve the speed and lift needed to get airborne. "Typically in the hotter days of the summer, you may have to bump payload, which includes cargo and / or passengers," said David Wilhelm, a senior dispatch manager at Southwest Airlines. Reducing weight allows a plane to take off with less lift.
As global temperatures continue to rise, some of the heaviest planes on the longest flights may eventually be unable to depart during the hottest part of summer days, Radley Horton said, a research scientist at Columbia University’s Earth Institute. He also pointed out that a no-fly window of even a few hours at a particular airport could have a ripple effect across airline operations.
With forecasts predicting record-breaking temperatures in Phoenix on Tuesday—and some flights being canceled pre-emptively—many passengers stayed away from the airport entirely.
[A] figures out that all the airlines are advancing preparations for climate change.
[B] holds the view that airlines don’t put more emphasis on longer-term issues of climate change.
[C] believes that decreasing payload of cargo or passengers can make airplane take off.
[D] says that downplaying the importance of atmosphere is not right.
[E] points out that global warming is not the only reason for airline service disruption.
[F] thinks that the smaller airplane cannot operate over 118 degrees.
[G] considers that the plane was grounded for hours, which has a knock-on effect on airline operations.
Paul D. Williams
选项
答案
D
解析
由题干关键词Paul,D项Williams可定位到第二段。由We tend to ignore the atmosphere and just think that the plane is flying through empty space, but of course, it’s not(我们往往忽视大气,认为飞机是在空的空间里飞行,实际情况当然不是这样的)可知,D项“淡化大气层的重要性是错误的”为正确选项。故本题选D。
转载请注明原文地址:https://kaotiyun.com/show/1Bi4777K
0
考研英语二
相关试题推荐
Thepolicesearchedthebuilding______butfailedtofindoutwherethebombwas.
Theauthorthinksthatpullfactors______.People’sdecisionstomigratemightbeinfluencedbyallthefollowingEXCEPT____
Accordingtothepassage,thefactthatyoungpeopleseemtobelosinginterestinscience______.Thebesttitleforthepassa
ManyAmericansregardthejurysystemasaconcreteexpressionofcrucialdemocraticvalues,includingtheprinciplesthatallc
Nameshavegainedincreasingimportanceinthecompetitiveworldofhighereducation.Ascollegesstriveformarketshare,they
TheUnitedStateshashistoricallyhadhigherratesofmarriagethanthoseofotherindustrializedcountries.Thecurrentannual
Conveniencefoodhelpscompaniesbycreatinggrowth;butwhatisitseffectonpeople?Forpeoplewhothinkcookingwasthefoun
Theroleofgovernmentsinenvironmentalmanagementisdifficultbutinescapable.Sometimes,thestatetriestomanagetheresou
"Theword’protection’isnolongertaboo(禁忌语)."Thisshortsentence,utteredbyFrenchPresidentNicolasSarkozylatelastmont
Whatmakesagreathighschool?Americansthinkalotofthingsdo,fromoutstandingacademicsorasupportiveenvironmentfors
随机试题
夸美纽斯指出:“凡是需要知道的事物,都要通过事物本身来进行教学;就是说,应该尽可能地把事物本身或代替它的图像放在面前,让学生去看看、摸摸、听听、闻闻等等”;乌申斯基进一步指出:“一般说来,儿童是依靠形式、颜色、声音和感觉来进行思维的”“逻辑不是别的东西,而
瑞特染色的缓冲液pH应恒定在
受孕的必备条件包括
测定化妆品中甲醛时,甲醛标准溶液的配制应是
在食品检验中,用镉柱还原法或镉粉还原法所测定的物质是
下列属于扩张型资本运营的主要模式的有:()。
在我国,为证券交易提供清算、交收和过户服务的法人机构是()。
下列各项,能够引起所有者权益总额变化的是()。
创造性是指个体产生新奇独特的、______的产品的能力或特性。
Overacenturyago,AlfredRussellWallacewrotethat"weliveinazoologicallyimpoverishedworld,fromwhichallthehugest,
最新回复
(
0
)