首页
登录
职称英语
In the atmosphere, carbon dioxide acts rather like a one-way mirror—the glass
In the atmosphere, carbon dioxide acts rather like a one-way mirror—the glass
游客
2025-01-15
25
管理
问题
In the atmosphere, carbon dioxide acts rather like a one-way mirror—the glass in the roof of a greenhouse which allows the sun’s rays to enter but prevents the heat from escaping.
According to a weather expert’s prediction, the atmosphere will be 3 ℃ warmer in the year 2050 than it is today, if man continues to burn fuels at the present rate. If this warming up took place, the ice caps in the poles would begin to melt, thus raising sea level several meters and severely flooding coastal cities. Also. the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere, possibly resulting in an alteration of earth’s chief food-growing zones. In the past, concern about a man-made warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet. But the weather experts are now paying more attention to West Antarctic, which may be affected by only a few degrees of warming, in other words, by a warming on the scale that will possibly take place in the next fifty years from the burning of fuels.
Satellite pictures show that large areas of Antarctic ice are already disappearing. The evidence available suggests that a warming has taken place. This fits the theory that carbon dioxide warms the earth.
However, most of the fuel is burnt in the northern hemisphere, where temperatures seem to be falling. Scientists conclude, therefore, that up to now natural influences on the weather have exceeded those caused by man. The question is: Which natural cause has most effect on the weather?
One possibility is the variable behavior of the sun. Astronomers at one research station have studied the hot spots and "cold" spots (that is, the relatively less hot spots) on the sun. As the sun rotates, every 27.5 days, it presents hotter or "colder" faces to the earth, and different aspects to different parts of the earth. This seems to have a considerable effect on the distribution of the earth’s atmospheric pressure, and consequently on wind circulation. The sun is also variable over a long term: its heat output goes up and down in cycles, the latest trend being downward.
Scientists are-now finding mutual relations between models of solar-weather interactions and the actual climate over many thousands of years, including the last Ice Age. The problem is that the models are predicting that the world should be entering a new Ice Age and it is not. One way of solving this theoretical difficulty is to assume a delay of thousands of years while the solar effects overcome the inertia of the earth’s climate. If this is tight, the warming effect of carbon dioxide might thus be serving as a useful counter-balance to the sun’s diminishing heat. [br] If the assumption about the delay of a new Ice Age is correct, ______.
选项
A、the best way to overcome the cooling effect would be to bum more fuels
B、ice would soon cover the northern hemisphere
C、the increased levels of carbon dioxide in the atmosphere could warm up the earth even more quickly
D、the greenhouse effect could work to the advantage of the earth
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3913672.html
相关试题推荐
[originaltext]Haveyoueverheardofbungeejumping?Itisaratherthrilli
[originaltext]Haveyoueverheardofbungeejumping?Itisaratherthrilli
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglass
Thisbookconcentratesratheronproductsoringredients,whichareaddedto
Thisbookconcentratesratheronproductsoringredients,whichareaddedto
Thisbookconcentratesratheronproductsoringredients,whichareaddedto
Thisbookconcentratesratheronproductsoringredients,whichareaddedto
TheatmospherethatoriginallysurroundedEarthwasprobablymuchdifferent
TheatmospherethatoriginallysurroundedEarthwasprobablymuchdifferent
TheatmospherethatoriginallysurroundedEarthwasprobablymuchdifferent
随机试题
Astudyofarthistorymightbeagoodwaytolearnmoreaboutaculturetha
MissRitaCohen,atiny,pale-skinnedgirlwholookedhalftheageofSeymou
【教学过程】 第一环节:导入新课 教师让学生观察课本P55页图3-29,第ⅥA族元素的气态氢化物的沸点随相对分子质量的增大而升高,符合前面所学规律,但H
间接融资通过金融机构进行。在多数情况下,这种中介不是对某一资金供应者与某一资金需
金融资产的持有者为了资金安全而进行资金调拨所形成的国际资金流动被称为( )A.
左边给定的是削掉一个角的纸盒,下列哪一项不是有它展开而成? A.见上图
参加各种社会生活和与自身利益相关的社会活动并通过发表言论和采取行动对其产生影响是
物业服务企业的组织形式中,事业部制是较为现代的一种组织形式,其主要优点包括()
某税务稽查局2019年6月对辖区内一家企业进行纳税检查时,发现该企业2
(2020年真题)根据《土壤环境质量建设用地土壤污染风险管控标准(试行》,第一类
最新回复
(
0
)