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
2023-12-23
8
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/3299112.html
相关试题推荐
Whatisthefunctionofcarboncapturetechnology?[br][originaltext]Acoal
Whatisthefunctionofcarboncapturetechnology?[br][originaltext]Acoal
[originaltext]Haveyoueverheardofbungeejumping?Itisaratherthrilli
[originaltext]Haveyoueverheardofbungeejumping?Itisaratherthrilli
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglass
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglass
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglass
Thisbookconcentratesratheronproductsoringredients,whichareaddedto
Thisbookconcentratesratheronproductsoringredients,whichareaddedto
Thisbookconcentratesratheronproductsoringredients,whichareaddedto
随机试题
Binoculars(双筒望远镜)arenotonlyusedforwildlifeobservation,butareessenti
CanMixofTeachers,ComputersLeadtoPupilSuccess?[A]Whenvisitorst
Whatgoodsdoesthebuyerorder?[br]InwhatwayshouldthebuyeramendtheL/C
[originaltext]W:Hi,Sam,IhatetobotheryoubutIwonderifIcouldhaveaw
WhatIfACollegeEducationJustIsn’tforEveryone?[A]Longbeforethe
绩效就其范围而言,可以分为企业绩效、部门绩效和( )。A.员工个人绩效 B.
下列由被告(被申请人)负举证责任的是: A.行政诉讼中,证明与被诉具体行政行
建筑的屋面外保温系统,当屋面板的耐火极限不低于()h时,保温材料的燃烧性能不应
A.平肝潜阳,收敛固涩 B.平肝潜阳,清肝明目 C.平肝潜阳,祛风止痒 D
我国新时期卫生工作指导方针中的战略重点是( )。A.为人民健康服务,为社会主义
最新回复
(
0
)