首页
登录
职称英语
Cleaning up our air may have made us healthier. A new analysis shows that the
Cleaning up our air may have made us healthier. A new analysis shows that the
游客
2024-01-31
17
管理
问题
Cleaning up our air may have made us healthier. A new analysis shows that the number of storms falls when pollution rises, and increases when pollution drops. Further tightening of present pollution controls " could reduce aerosols (气溶胶;悬浮颗粒) so quickly that we have record numbers of tropical storms for the next decade or two" , says Nick Dunstone of the Met Office
Hadley Centre in Exeter, UK.
Earlier studies found no connection between storm numbers and aerosols’ ability to cool the surface by scattering light in the open air. But aerosols also increase the brightness and lifetime of low-level marine clouds. When Nick Dunstone of the Met Office Hadley Centre in Exeter, UK, added this effect into his climate models, the simulated clouds cooled the surface more than expected. Historically, this cooling effect has been strongest in the north Atlantic.
Cooling the north Atlantic reduces the energy available to power hurricanes. It also shifts rising and falling air currents further south, increasing wind shear in the Atlantic hurricane nursery. This extra wind shear tears nascent storms apart before they can gain strength. In this way, Dunstone says, changes in aerosol emissions appear to drive cyclical variations in north Atlantic tropical storms. These variations have long been attributed to natural variations in ocean circulation.
Throughout the 20th century, aerosol emissions increased with industrialization and decreased in economic slumps. Tropical storms were frequent from the 1930s through to the 1950s, but rarer in the better economic times of the 1960s to mid-1990s. Then pollution controls reduced aerosol levels, and Atlantic hurricanes came roaring back, with 19 in 1995, a record 28 in 2005, and 19 in each of the past three years.
Dunstone expects the increase to continue for another two decades. After that, global warming may begin to reduce the number of tropical storms, by warming the air and thus reducing the temperature difference between the sea surface and the atmosphere. It is not clear whether aerosols affect the intensity of storms. [br] What does the word "nascent" (Para. 3) mean?
选项
A、Powerful.
B、Earlier.
C、Horrible.
D、Small.
答案
B
解析
回归到第三段第三句,This extra wind shear tears nascent storms apart before they can gain strength。they指的是storms。在风暴变强大前,也就是在风暴还处于形成初期的状态下就将其切断,所以nascent的同义词是B。该题容易误选成D选项small,但该句并没有明确表示风暴的大小,而是说在它形成的初期和力量增强前。
转载请注明原文地址:https://tihaiku.com/zcyy/3408536.html
相关试题推荐
Cleaningupourairmayhavemadeushealthier.Anewanalysisshowsthatthe
Cleaningupourairmayhavemadeushealthier.Anewanalysisshowsthatthe
Cleaningupourairmayhavemadeushealthier.Anewanalysisshowsthatthe
Anewanalysisoffederalmoneythatpublicschoolsreceiveforlow-incomes
Anewanalysisoffederalmoneythatpublicschoolsreceiveforlow-incomes
Anewanalysisoffederalmoneythatpublicschoolsreceiveforlow-incomes
Anewanalysisoffederalmoneythatpublicschoolsreceiveforlow-incomes
Anewanalysisoffederalmoneythatpublicschoolsreceiveforlow-incomes
Anewanalysisoffederalmoneythatpublicschoolsreceiveforlow-incomes
[originaltext]Birdsspendsomuchtimesmoothing,cleaningandarrangingth
随机试题
Howwelldidthespeakerdointhetest?[br][originaltext]Duringthismorning
[originaltext]M:Goodmorning.CanIhelpyou?W:GoodMorning.We’dliketobo
PublicStorageisaninternationalself-storagecompany.Itrentsspaces,ra
财务管理职能包括( )。A.财务预测 B.财务计划 C.财务分析
营养性缺铁性贫血,使用铁剂治疗不正确的方法是A.二价铁比三价铁容易吸收,最好用硫
以训练学生的自我管理能力为主的班级管理制度改革的重点是()A.适当增加班干部岗
重症见口和齿润,小便清长,夜卧安静,并无潮热,其辨证为( )。A.心善 B.
被誉为“现代城市设计之父”的西谛于1889年出版的《城市建筑艺术》一书,提出了现
海昌公司因丢失票据申请公示催告,期间届满无人申报权利,海昌公司遂申请除权判决。在
水泥是水硬性胶凝材料,其基本组成为()。A.水泥熟料 B.石膏 C.添加剂
最新回复
(
0
)