首页
登录
职称英语
Climatic conditions are delicately adjusted to the composition of the Earth’
Climatic conditions are delicately adjusted to the composition of the Earth’
游客
2025-04-22
36
管理
问题
Climatic conditions are delicately adjusted to the composition of the Earth’s atmosphere. If there were a change in the atmosphere for example, in the relative proportions of atmosphere gases the climate would probably change also. A slight increase in water vapor, for instance, would increase the heat-retaining capacity of the atmosphere and would lead to a rise in global temperatures. In contrast, a large increase in water vapor would increase the thickness and extent of the cloud layer, reducing the amount of solar energy reaching the Earth’s surface.
The level of carbon dioxide, CO2, in the atmosphere has an important effect on climatic change. Most of the Earth’s incoming energy is short wavelength radiation, which tends to pass through atmospheric CO2 easily. The Earth, however, reradiates much of the received energy as a long wavelength radiation, which CO2 absorbs and then remits toward the Earth. This phenomenon, known as the greenhouse effect, can result in an increase in the surface temperature of a planet. An extreme example of the effect is shown by the Venus, a planet covered by heavy clouds composed mostly of CO2, whose surface temperatures have been measured at 430℃. If the CO2 content of the atmosphere is reduced, the temperature falls. According to one respectable theory, if the atmospheric CO2 concentration were halved, the Earth would become completely covered with ice. Another equally respectable theory, however, states that a halving of the CO2 concentration would lead only to a reduction in global temperatures of 3℃. If, because of an increase in forest fires or volcanic activities, the CO2 content of the atmosphere increased, a warmer climate would be produced. Plant growth, which relies on both the warmth and the availability of CO2, would probably increase. As a consequence, plants would use more and more CO2. Eventually CO2 levels would diminish and the climate, in turn, would become cooler. With reduced temperatures many plants would die; CO2 would thereby be returned to the atmosphere and gradually the temperatures would rise again. Thus, if this process occurred, there might be a long-term oscillation in the amount of CO2 present in the atmosphere, with regular temperature increases and decreases of a set magnitude.
Some climatologists argue that the burning of fossil fuels has raised the level of CO2 in the atmosphere and has caused a global temperature rise of at least 1℃. But a supposed global temperature rise of 1℃ may in reality be only several regional temperature increases, restricted to areas where there are many meteorological stations and caused simply by shifts in the pattern of atmospheric circulation. Other areas, for example, the Southern Hemisphere oceanic zone, may be experiencing an equivalent temperature decrease that is unrecognized because of the shortage of meteorological recording stations. [br] The passage suggests that a large decrease in the amount of CO2 in the atmosphere would result in ______.
选项
A、at least a slight decrease in global temperatures
B、at most a slight increase in short wavelength radiation reaching the Earth
C、a slight long-term increase in global temperatures
D、a slight short-term increase in global temperatures
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/4049439.html
相关试题推荐
ClimaticconditionsaredelicatelyadjustedtothecompositionoftheEarth’
ClimaticconditionsaredelicatelyadjustedtothecompositionoftheEarth’
ClimaticconditionsaredelicatelyadjustedtothecompositionoftheEarth’
Inthispart,youarerequiredtowriteacompositionentitledProblemofPi
Inthispart,youarerequiredtowriteacompositionentitledWhichIsMore
Directions:Writeashortcompositionofabout250to300wordsonthetopic
UnlikethecarefullyweighedandplannedcompositionsofDante,Goethe’swri
UnlikethecarefullyweighedandplannedcompositionsofDante,Goethe’swri
Writeacompositionofatleast250wordsbasedonthetitle"CanMoneyBuyHapp
Itisnotlongsinceconditionsinthemineswereworsethantheyarenow.T
随机试题
[originaltext]Whowillbespeakingattheconvention?(A)No,I’vealreadyspok
Whenyouhavetomeetsomeonefromadifferentculture,beprepared.Ifyou
Anextremeexampleofafederalsystemistheoneadoptedinthe1970sinYug
Hewas______tostealthemoneywhenhesawitlyingonthetable.A、draggedB、t
A.A B.B C.C D.D
标准稠度用水量、凝结时间、安定性是水泥常规性能检测项目,用于评价水泥物理性能的优
预防接种属于A.非特异性免疫 B.自然主动免疫 C.自然被动免疫 D.人工
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:
在施工措施项目及计量中,施工项目管理规划的主要内容有()。A.施工现场管理
如果技术方案在经济上是可以接受的,其财务内部收益率应( )。A.小于基准收益率
最新回复
(
0
)