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
24
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] Which of the following is the factor that influences aerosol emissions?
选项
A、Cyclical variations in north Atlantic tropical storms.
B、Intensity of storms.
C、The process of industrialization.
D、The natural variations in ocean circulation.
答案
C
解析
根据题干可以将该题定位至第四段,第四段的第一句话就道出了答案。“气溶胶排放随着工业化的进程而增加,在经济衰退时又有所减少”,所以C选项正确。A、B和D选项都不是影响气溶胶排放量的因素。
转载请注明原文地址:https://tihaiku.com/zcyy/3408537.html
相关试题推荐
Cleaningupourairmayhavemadeushealthier.Anewanalysisshowsthatthe
Cleaningupourairmayhavemadeushealthier.Anewanalysisshowsthatthe
Cleaningupourairmayhavemadeushealthier.Anewanalysisshowsthatthe
Cleaningupourairmayhavemadeushealthier.Anewanalysisshowsthatthe
Anewanalysisoffederalmoneythatpublicschoolsreceiveforlow-incomes
Anewanalysisoffederalmoneythatpublicschoolsreceiveforlow-incomes
Anewanalysisoffederalmoneythatpublicschoolsreceiveforlow-incomes
Anewanalysisoffederalmoneythatpublicschoolsreceiveforlow-incomes
Anewanalysisoffederalmoneythatpublicschoolsreceiveforlow-incomes
[originaltext]Birdsspendsomuchtimesmoothing,cleaningandarrangingth
随机试题
[originaltext]M:Idon’tenjoytheTVprogram.Wouldyoupleaseturnitofffor
OneminutePiercewasbymyside,thenexthehaddisappearedintothecrowd.A、w
RISC(精简指令系统计算机)是计算机系统的基础技术之一,其特点不包括()。A
肝昏迷灌肠,不易选用肥皂水,是( )A.防止发生腹胀 B.防止对肠黏膜的刺激
秦艽的功效是()A.祛风湿,通经络,利水 B.祛风湿,止痹痛,安胎 C
患者胸膈满闷,痞塞不舒,身重头晕,目眩纳呆,口淡不渴,小便不利,舌苔白厚腻,脉沉
A.12.5π平方米 B.25平方米 C.(50-12.5π)平方米 D.
预算收入以缴入基层金库作为入库的标准,基层金库是指(??)。A.省级金库 B.
下列各项有关投资性房地产会计处理的表述中,正确的有()。A.以成本模式后续计量的
下列文件中,属于工程材料质量证明文件的有( )。A.材料供货合同 B.出厂
最新回复
(
0
)