首页
登录
职称英语
Scientists studying the effect of large volcanic eruptions on global
Scientists studying the effect of large volcanic eruptions on global
游客
2024-01-11
39
管理
问题
Scientists studying the effect of large volcanic eruptions on global climate
have long focused on the major quantities of carbon dioxide (C02), a gas known
to contribute to the greenhouse effect, produced by these eruptions. It is well
Line observed that such greenhouse gases trap heat radiated from the surface of the
(5) earth, thereby forming a type of insulation around the planet. The greenhouse
effect is essential for ecological equipoise because it maintains the temperature
of the planet within habitable parameters, but there is growing concern that
man-made production of gases such as CO~ from the burning of fossil fuels may
be threatening the system’s tolerance, and have resulted in excessive warming
(10) on a global scale.
While volcanic eruptions indubitably metabolize and accumulate C02 in the
atmosphere, it has been recently discovered that their impact is virtually trivial
compared to the quantity produced by human activities, especially heavy
industry. In reality, the more substantive climatic effect from volcanoes results
(15) from the production of atmospheric haze, whereby large eruption columns inject
ash particles and sulfur-rich gases into the troposphere and stratosphere, clouds
that circumscribe the globe within weeks of the volcanic activity. Ash and
aerosol clouds from large volcanic eruptions disseminate quickly through the
atmosphere, and the small ash particles decrease the amount of sunlight
(20) reaching the surface of the earth and lower average global temperatures, while
the sulfurous gases combine with water in the atmosphere to form acidic
aerosols that also absorb incoming solar radiation and scatter it back out into
space.
There is evidence that volcanoes’ stratospheric ash clouds has a lesser
(25) effect on global temperatures than aerosol clouds, given that the major Mt. St.
Helens eruption had lowered global temperatures by about 0.1 degree C, while
two years later the much smaller eruption of El Chico had, by contrast, three to
five times the global cooling effect worldwide. Despite its smaller ash cloud, El
Chico emitted more than 40 times the volume of sulfur-rich gases produced by
(30) Mt. St. Helens, revealing that the formation of atmospheric sulfur aerosols has
a more substantial effect on global temperatures than simply the volume of ash
produced during an eruption. Sulfate aerosols appear to necessitate several
years to settle out of the atmosphere, one of the reasons their effects are so
widespread and enduring. This corroborates the opinion of those scientists who
(35) argue that without the cooling effect of major volcanic eruptions such as E1
Chico, global warming effects caused by human activities would be far more
substantial. It should be noted that major volcanic eruptions have additional
climatic effects beyond global temperature decreases and acid rain, for ash and
aerosol particles suspended in the atmosphere scatter light of red wavelengths,
(40) often resulting in brilliantly colored sunsets and sunrises around the world. [br] Which of the following discoveries would likely have an effect upon the views of scientists similar to that of the explosion of El Chico?
选项
A、The history of wildfires in North America demonstrates that controlled blazes have a positive effect on the environment, on the whole.
B、The capability of certain metal alloys to withstand great heat proves greater than that of another, confirming metallurgists’ suspicions.
C、The study of seismological data proves that existing safety standards inconstruction will likely prove insufficient in the future.
D、One cigarette brand is found to cause fewer cases of cancer than another brand, disproving the notion that the first brand’s contents are more carcinogenic.
E、Ideas concerning the causes of schizophrenia are complicated by the discovery of a rare new psychotic condition whose symptoms defy explanation.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3352837.html
相关试题推荐
Thus,global-warmingskepticswriteoffthe______ofclimateresearchinvestiga
A、neuraldegenerationmayoccurtooearlyforscientiststobeabledrawmanyus
Arhetoricianwhospendssomuchofhistimestudyingthefamous______oflogic
Althoughscientistshavelong______thehumanappendixas______organ,therei
Currentestimatesputthirteenpercentofglobalfloraatriskofextinction,bu
A、Scientistshaveruledoutthepossibilitythattheappendixisinvolvedinhin
Scientistshavelongsoughtthereasonsfortherelativelyyoungageof
A、ThedeepandenduringeffectthatvolcaniceruptionshaveontheenvironmentB
Scientistsstudyingtheeffectoflargevolcaniceruptionsonglobalcl
A、Asmallpopulationwithlowconsumptionrates,consideredgloballyB、Alargep
随机试题
[originaltext]M:Say,rememberthatproposalforaninternationalfestivalnext
女性,36岁。饱餐后突发上腹部胀痛8小时,向腰背部放射,自服颠茄不缓解。查体:腹
下列关于补充侦查,不正确的说法有?A.范某盗窃案,公安机关提请检察院对范某批准逮
下面是某求助者的WAIS-RC的测验结果:对于WAIS-RC,正确的说法包括()
使用中药注射剂时,注意事项不包括A.严禁混合配伍 B.上午滴注 C.对过敏体
定期定额纳税户“同富居酒店”的老板李某,2020年1月,将酒店承包给张某经营,张
华蓓公司是Y市一家生产婴幼儿用品的企业。各年来公司在Y市婴幼儿用品市场拥有稳定的
下列审计程序中,通常不能为定期存款的存在认定提供可靠的审计证据的是( )。A.
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
在工程测量的基本程序中,设置标高基准后,下一步应进行的程序是( )。A.安装过
最新回复
(
0
)