题目内容（请给出正确答案）

[主观题]

The largest warming effects happened in the Northern Hemisphere with __________.

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A.thinning sea ice and insufficient sunlight

B.light snow cover and sufficient sunlight

C.heavy snow cover and sufficient sunlight

D.thick sea ice and insufficient sunlight

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更多“The largest warming effects ha…”相关的问题

第1题

请根据短文内容，回答题。 Soot （煤烟灰） and Snow: a Hot CombinationNew research from NASA sci

请根据短文内容，回答题。

Soot （煤烟灰） and Snow: a Hot Combination

New research from NASA scientists suggests emissions of black soot alter the way sunlight reflects off snow. According to a computer simulation, black soot may be responsible for 25 percent of observed global warming over the past century.＜br＞

Soot in the higher latitudes (纬度) of the Earth, where ice is more common, absorbs more of the sun&39;s energy and warmth than an icy, white background. Dark-colored black carbon, or soot, absorbs sunlight, while lighter colored ice reflects sunlight.＜br＞

Soot in areas with snow and ice may play an important role in climate change. Also, if snow and ice covered areas begin melting, the warming effect increases, as the soot becomes more concentrated on the snow surface. "This provides a positive feedback, as glaciers and ice sheets melt, they tend to get even dirtier," said Dr. James Hansen, a researcher at NASA&39;s Goddard Institute for Space Studies, New York.＜br＞

Hansen found soot&39;s effect on snow albedo (反照率), which may be contributing to trends toward early springs in the Northern Hemisphere, such as thinning Arctic sea ice and melting glaciers permafi:ost. Soot also is believed to play a role in changes in the atmosphere above the oceans and land.＜br＞

"Black carbon reduces the amount of energy reflected by snow back into space, thus heating the snow surface more than if there were no black carbon," Hansen said. Soot&39;s increased absorption of solar energy is especially effective in warming the world&39;s climate. "This forcing is unusually effective, causing twice as much global warming as a carbon-dioxide forcing of the same magnitude," Hansen noted.＜br＞

Hansen cautioned, although the role of soot in altering global climate is substantial, it does not alter the fact that greenhouse gases are the primary cause of climate warming during the past century. Such gases are expected to be the largest climate forcing for the rest of the century.＜br＞

The researchers found that observed warming in the Northern Hemisphere was large in the winter and spring at middle and high latitudes. These observations were coherent with the researchers&39; climate model situations, which showed some of the largest warming effects occurred when there were heavy snow cover and sufficient sunlight.＜

Which of the following statements of soot is NOT true？查看材料

A.It absorbs sun"s heat.

B.It is responsible for climate change.

C.It reflects sunlight.

D.It may account for a quarter of global warming over the past century.

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第2题

Soot and Snow: a Hot Combination1New research from NASA scientists suggests emissions of b

Soot and Snow: a Hot Combination

1 New research from NASA scientists suggests emissions of black soot alter the way sunlight reflects off snow. According to a computer simulation, black soot may be responsible for 25 percent of observed global warming over the past century.

2 Soot in the higher latitudes of the Earth, where ice is more common, absorbs more of the sun&39;s energy and warmth than an icy, white background. Dark-colored black carbon, or soot, absorbs sunlight, while lighter colored ice reflects sunlight.

3 Soot in areas with snow and ice may play an important role in climate change. Also, if snow and ice covered areas begin melting, the warming effect increases, as the soot becomes more concentrated on the snow surface. "This provides a positive feedback, as glaciers and ice sheets melt, they tend to get even dirtier," said Dr. James Hansen, a researcher at NASA&39;s Goddard Institute for Space Studies, New York.

4 Hansen found soot&39;s effect on snow albedo (solar energy reflected back to space), which may be contributing m trends toward early springs in the Northern Hemisphere, such as thinning Arctic sea ice, melting glaciers and permafrost. Soot also is believed to play a role in changes in the atmosphere above the oceans and land.

5 "Black carbon reduces the amount of energy reflected by snow back into space, thus heating the snow surface more than if there were no black carbon," Hansen said. Soot&39;s increased absorption of solar energy is especially effective in warming the world&39;s climate. "This forcing is unusually effective, causing twice as much global warming as a carbon-dioxide forcing of the same magnitude," Hansen noted.

6 Hansen cautioned, although the role of soot in altering global climate is substantial, it does not alter the fact that greenhouse gases are the primary cause of climate warming during the past century, Such gases are expected to be the largest climate forcing for the rest of this century.

7 The researchers found that observed warming in the Northern Hemisphere was large in the winter and spring at middle and high latitudes. These observations were consistent with the researchers&39; climate model simulations, which showed some of the largest warming effects occurred when there were heavy snow cover and sufficient sunlight.

Paragraph 3 ______

A Soot&39;s Role in Changes in the Climate and the AtmosphereB Observations of Warming in the Northern HemisphereC Explanation of Increased Warming Effect Caused by SootD Effort to Reduce Snow AlbedoE Ways to Reduce Soot EmissionF Greenhouse Gases as the Main Factor of Global Warming

Paragraph 4 ______

Paragraph 6 ______

Paragraph 7 ______

In the twentieth century, soot ______.

A.produces much more global warming than a carbon-dioxide forcing0f the same magnitudeB.contributed to 25 percent of observed global warmingC.can produce greenhouse gasesD.absorb more of sun&39;s energy and warmth than white backgroundE.still surpass soot in warming the world&39;s climate during the last centuryF.can be seen mostly in the Northern Hemisphere

Hansen cautioned that greenhouse gases ______.

Black soot covered snow and ice ______.

A soot forcing is unusually effective, which ______.

请帮忙给出每个问题的正确答案和分析，谢谢！

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第3题

The impact of global warming could be twice as severe as the worst situation feared 【C1】__

____ the United Nations' scientists, the world's largest climate-mod- cling experiment has shown. Average temperatures could 【C2】______ by 11℃ to reach highs that would change the 【C3】______ of the globe, researchers who have run 60 000 computer simulations (模拟) of 【C4】______ change said yesterday.

The conclusions suggest that 【C5】______ by the UN's Intergovernmental Panel on Climate Change (IPCC) 【C6】______ be much too conservative. In the worst case, the world would 【C7】______ heat up by almost double the 【C8】______ increase imagined by the Panel. The IPCC's latest report predicted that temperatures will rise by 【C9】______ 1.4℃ and 5.8℃ by 2100.

A 【C10】______ 11℃ warmer than it is today would be unrecognizable: 【C11】______ records show that the 【C12】______ has been hotter than it is today for about 80 percent of its history, there is no evidence 【C13】______ it has ever been more than about 7℃ warmer.

Although it would take hundreds of years for the full 【C14】______ to be felt, the polar ice caps eventually would 【C15】______ completely, causing sea levels to rise by 70 m. to 100 m. Coastal and 【C16】______ cities such as London and New York would be submerged.

As the 11℃ 【C17】______ is a global average, temperatures would be expected to climb even 【C18】______ in some regions.

David Stain forth, of the University of Oxford, the study's chief scientist said: "When I start to look at these figures, I get very 【C19】______ about them. An 11- degree warmer world would be a dramatically 【C20】______ world. What shall we do now？"

【C1】

A．for

B．of

C．with

D．by

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第4题

In the United States the science of climate change still remains a controversial issue. Pa

rt of the problem is that it is complex and hard to isolate its parts. We do know how vital it is to life. The atmosphere forms a gaseous, protective envelope around earth protecting the earth from the cold of space, from harmful ultraviolet light, and from all but the largest meteors. After traveling over 93 million miles, solar energy strikes the atmosphere and earth's surface, warming the planet and creating what is known as the "biosphere" which is the region of earth capable of sustaining life. Atmospheric circulation is one important reason that life on earth can exist at higher latitudes because equatorial heat is transported poleward, moderating the climate.

The atmosphere is not just a protector but also a great transporter. The transport of water vapor in the atmosphere is an important mechanism by which heat energy is redistributed poleward. Heat energy absorbed at the equator is deposited at the poles and the temperature gradient between these regions is reduced. The circulation of the atmosphere and the weather it generates is but one example of the many complex, interdependent events of nature. The web of life depends on the proper functioning of these natural mechanisms for its continued existence.

Some argue that climate change is too complicated to be attributed only to human activity. For example, fossil studies of radiolaria, a group of one-celled animals characterized by silicon-containing shells, have given scientists a fairly accurate account of climatic conditions in the distant past. Geologists found these 450, 000-year-old microorganisms preserved in cores of sediment taken beneath the floor of the Indian Ocean. They provide a record of cycles of climatic changes, determined by the alternating layers of species of warm and cold-preferring radiolaria. We now have confirmation that changes in the earth's orbital geometry caused the ice ages.

This does not let us off the hook because although we can hardly alter the basic forces at work that alter climate, even small contributions by humans can have dramatic effects. Given nature's interconnectedness, it is possible that the most serious threats have yet to be recognized.

The first paragraph of the text deals mainly with the earth atmosphere's ______.

A．sheltering effect

B．reviving effect

C．invigorating effect

D．cleansing effect

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第5题

When warming up, you'll breathe a little bit faster.A．RightB．WrongC．Not mentioned

When warming up, you'll breathe a little bit faster.

A．Right

B．Wrong

C．Not mentioned