首页
登录
职称英语
While there have been countless attempts at correlating sunspot cycl
While there have been countless attempts at correlating sunspot cycl
游客
2024-01-11
18
管理
问题
While there have been countless attempts at correlating sunspot cycles with
such diverse phenomena as the economy, crop yields, and the weather, there has
been little evidence to support these correlations. The past few decades have
Line seen a renewed interest in the sun-climate relationship with a comprehensive
(5) analysis of many different historical records of solar observation. Late in the
seventeenth century, a period known as the Maunder Minimum, there were
virtually no sunspots observed, indicating a "quiet" period in the sun’s activity
coinciding with the height of a time known as the Little Ice Age, a period of
lower temperatures in Europe. Once this evidence had been synthesized, it has
(10) become much clearer that there are indeed robust correlations between the
Earth’s temperature and sunspots. Perhaps the most important development in
the solar-climate link came when satellites were developed to measure, in rough
terms, the Total Solar Irradiance (TSI), a factor shown to be directly related to
these "activity" cycles. At the maxima of these cycles, there are more sunspots
(15) (magnetic phenomena that attenuate local irradiance), but new instruments
show that these dark sunspots are more than compensated for by bright areas on
the sun called faculae; therefore, the overall irradiance increases in
correspondence with higher numbers of sunspots.
Unfortunately, identifying this evident increase in minimum values as a
(20) trend provokes concern, as there have been only two minima ever measured in
this way. We must be aware that the warming trend in the surface temperature
goes far beyond the last two decades, and that an extension of the solar record
is necessary to assess whether solar activity and irradiance is indeed increasing
at the minima of the cycles and what the potential effect on the climate may be.
(25) The solar record has been extended by the use of the historical sunspot records
already mentioned and correlations have been drawn between solar irradiance
and the temperature curve since 1610, suggesting a predominant solar influence
in the pre-industrial period. But since 1860 only half the observed warming
could be attributable to the irradiance increase, indicating that some other
(30) influence is becoming more influential in controlling the temperature change:
most likely industrial carbon-dioxide.
Recent studies of global warming have necessitated a more comprehensive
effort to quantify the natural climate variability so that the residual change may
be attributed to the anthropogenic emissions of greenhouse gases. This attempt
(35) at quantification of the many different forces effect on the climate has re-
emphasized the complexity of the climate system and the simultaneous
interaction of many influences. Solar irradiance may indeed account for some of
the temperature increases recorded over the last several decades, but as the
atmospheric CO2 rises, due to the exponential increase in emissions from
(40) industrial sources, the influence of solar variability on the Earth’s climate will
most likely decrease, and its relative contribution will be far surpassed by
"greenhouse" gases. [br] It can be inferred from the passage that the hypothesis linking carbon dioxide to non-sunspot-related climate change is based on which of the following assumptions?
选项
A、The effect of sunspots on the climate has actually diminished with the development of greenhouse gases.
B、There are no phenomena other than carbon-dioxide and solar cycles that could affect climate change in a significant manner.
C、The increase of solar minima over the past two decades has probably exacerbated the warming effects of greenhouse gases.
D、Carbon-dioxide did not exist in significant quantities in the environment prior to industrialization.
E、Carbon-dioxide levels in the Earth’s atmosphere rise and fall according to the same eleven-year cycles as sunspots.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3353571.html
相关试题推荐
AfterobservingtheEarth’sweatherpatternsandthe11-yearsunspotcycleofth
Noneoftheattemptstospecifythecausesofcrimeexplainswhymostofthepeo
Sunspots,vorticesofgasassociatedwithstrongelectromagneticactivity,arev
A、itfailstodescribespaceonanon-locallevel,complicatingattemptstodete
Becauseofitsprecision,theCepheid-variablemethodofcorrelating
Becauseofitsprecision,theCepheid-variablemethodofcorrelating
Becauseofitsprecision,theCepheid-variablemethodofcorrelating
Whiletherehavebeencountlessattemptsatcorrelatingsunspotcycl
Whiletherehavebeencountlessattemptsatcorrelatingsunspotcycl
Whiletherehavebeencountlessattemptsatcorrelatingsunspotcycl
随机试题
Inthemeetingheldlastnightthevicepresidentrefusedtomakeanycommenton
[originaltext](32)Theworld’sfirstcompletelyautomaticrailwayhasbeenb
Inthefilm,thedullrhetoricandploddingbehavioroftheheromakehimasple
输卵管妊娠化学药物治疗条件不恰当的是下列哪一项A.输卵管妊娠包块直径≤4cm
诊断甲状腺机能亢进症最灵敏可靠的实验室检查方法为A.基础代谢率 B.血肖蛋
关于我国第六次人口普查,下列表述正确的是:A.其标准时点是2010年1月1日至2
下列关于信贷审批的说法,不正确的是()。A.原有贷款的展期无须再次经过审批程序
音色主要由声音的()决定的。A:频率B:波形C:强度D:音调
不宜行牙槽骨修整术的是A.拔牙后1个月以上,下颌骨尖压痛明显 B.上颌无牙颌牙
隔离开关控制接线原则以下错误的是()。 A.装设指示隔离开关的信号,防止在信号
最新回复
(
0
)