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题型:阅读理解-阅读单选 难度:0.4 引用次数:556 题号:13335493

For millions of years, Arctic sea ice has expanded and shrunk in a rhythmic dance with the summer sun. Humans evolved in this icy world, and civilization relied on it for climatic, ecological and political stability. But now the world comes ever closer to a future without ice. The National Snow and Ice Data Center reported that 2019’s minimum arctic sea ice extent was the second lowest on record. Arctic summers could become mostly ice-free in 30 years, and possibly sooner if current trends continue. As the northern sea ice declines, the world must unite to preserve what remains of the Arctic.

Although most people have never seen the sea ice, its effects are never far away. By reflecting sunlight, Arctic ice acts as Earth’s air conditioner. Once dark water replaces brilliant ice, Earth could warm substantially, equivalent to the warming caused by the additional release of a trillion tons of carbon dioxide (CO2) into the atmosphere and declining sea ice threatens wildlife, from the polar bear to algae that grow beneath the sea ice, supporting the large amount of marine life.

To avoid the consequences the scientific community should advocate not just for lowering greenhouse gas emissions, but also for protecting the Arctic from exploitation. The Antarctic shows the way. In the 1950s, countries raced to claim the Antarctic continent for resources and military installations. Enter the scientists. The 1957-1958 International Geophysical Year brought together scientists from competing countries to study Antarctica, and countries temporarily suspended their territorial disputes (争议). In 1959, 12 countries signed the Antarctic Treaty to preserve the continent for peaceful scientific discovery rather than territorial and military gain.

Sixty years later, we must now save the Arctic. A new Marine Arctic Peace Sanctuary (MAPS) Treaty would protect the Arctic Ocean as a scientific preserve for peaceful purposes only. Similar to Antarctica, MAPS would prohibit resource exploitation, commercial fishing and shipping, and military exercises. So far, only 2 non-Arctic countries have signed MAPS; 97 more need to sign on to enact it into law. Scientists can help—just as they did for the Antarctic—by giving statements of support, asking scientific organizations to endorse (支持) the treaty, communicating the importance of protecting the arctic to the public and policy-makers, and above all, by convincing national leaders to sign the treaty. In particular, Arctic nations must agree that recognizing the arctic as an international preserve is better than fighting over it. In 2018, these countries successfully negotiated a 16-year moratorium on commercial fishing in the Arctic high seas, demonstrating that such agreements are possible.

Humans have only ever lived in a world topped by ice. Can we now work together to protect Arctic ecosystems, keep the northern peace, and allow the sea ice to return?

1. What can be inferred from the passage?
A.wildlife relies on sea ice for food and water.
B.The Arctic would be ice-free in 30 years.
C.Sea ice slows down the global warming.
D.The melting of sea ice releases CO2.
2. The Antarctic is mentioned in the passage in order to ________.
A.remind readers of the past of the Antarctic
B.propose a feasible approach for the Arctic
C.stress the importance of preserving sea ice
D.recall how the Antarctic Treaty came into being
3. The word “moratorium” (in paragraph 4) is closest in meaning to ________.
A.battleB.ban
C.memoD.protection
4. Which of the following might be the best title of the passage?
A.Antarctic: a Successful Comeback?B.Sea Ice and Global Warming
C.Arctic: the Earth’s FutureD.Life Without Ice?
【知识点】 气候 说明文 人与环境

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【推荐1】When the natural climate changes due to global warming, it can surely affect seals (海豹). The majority of them live in the Antarctic region but the ice is melting and their natural habitat can be seriously affected. These changes don’t take place overnight. They can be the result of many years of additional temperatures in the area. The seals then have to find ways to adapt.

Seals depend on the cool air currents to bring plenty of food for them. When the temperatures get higher there is less and less food and the seal population starts to get depleted. Mothers are not healthy enough to feed their babies. Many of them end up abandoned as the mothers have to leave to find their own source of food.

The fact that their desire to produce young can be changed and the warmer temperature is frightening too. It is also believed that the warmer temperature can allow different diseases and viruses to attack the seals. This is a huge concern as they can rapidly wipe out huge numbers of seals out there.

However, these changes in climate and temperature aren’t all bad for other species of seals. Scientists have found that those living in warmer climates are producing more young due to the changes. Research also shows that the females are moving further to find food and water. When they are out of the reach of the governing males, they are more willing to accept the moves of other males in the group.

This is good news too because it means that there will be more selection in the gene pool (基因库) for future generations. It can help the seals as a species adapt to change in their natural environment more easily.

The climate change problem for seals is directly linked to humans. When we take action to change what we let out into the environment, we will make positive changes for the seals. However, it is going to take a very long time to reverse (彻底改变) the effects of what has already been done.

1. What does the author regard climate changes for seals as?
A.A mirror of evolution.
B.A double-edged sword.
C.An unavoidable disaster for existence.
D.A requirement for more choice in the gene pool.
2. What does the underlined phrase in paragraph 2 probably mean?
A.Explode.B.Vary.
C.Disappear.D.Decrease.
3. What will happen to the seals in warmer climates?
A.The female seals will be in the lead.
B.Their genes will change a great deal.
C.Their number will be on the increase.
D.The females will keep away from the males.
4. What’s the main idea of the text?
A.How climate change affects seals.B.The importance of protecting seals.
C.Seal’s adaptation to climate change.D.Why seals are becoming less and less.
2020-07-10更新 | 202次组卷
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【推荐2】Warmer temperatures are the new normal

Hotter weather appears to be here to stay,El Nino or not.That's according to the U.N. weather agency.It warned that the Paris climate accord(协定)last year shouldn't give way to complacency(自满)about global warming.

The World Meteorological Organization issued(公布)its annual climate report following a record-hot 2015.It drew people's attention to records already announced by different countries' weather agencies.The agency pointed out that 2015 was breaking records on the surface.It also broke records hundreds of meters deep in the ocean.

And the first two months of 2016 were even hotter.These months are so unusual that they "have sent shockwaves around the climate science community."That's according to David Carlson of the World Climate Research Program.

Climate scientists blame record high temperatures last year and this year so far on a combination of a super-sized El Nino.It is a natural warming of pans of the Pacific that changes weather worldwide.Another factor is a long-term global warming trend from the burning of fossil fuels(化石燃料).

NASA said last month was 1.35 degrees Celsius (2.43 degrees Fahrenheit) warmer than average.Of that,0.8 degrees (1.44 degrees Fahrenheit) comes from the long-term warming.And 0.25 degrees (0.45 degrees Fahrenheit) comes from El Nino.The rest is from unexplained results.This was calculated by climate scientist Stefan Rahmstorf of the Potsdam Institute in Germany and the University of New South Wales.

Even after the El Nino phenomenon becomes less strong in coming months,way above normal temperatures won't exactly go away,Carlson and others said.

"We're on a slope; sometimes the slope goes very steep,sometimes it's a little bit more shallow,but we're going upward,"Carlson said in a news conference."So the normal is going to be increases: It's going to be increased temperature,increased ocean heat content,loss of ice,we know all of these things."

Katharine Hayhoe is a Texas Tech climate scientist who wasn't part of the WMO team.But she agreed:"These records vividly show the destructive power of an El Nino on climate changes."

The WMO predicts warmer weather accompanied by pockets of both drier and wetter conditions,depending on the region,around the world.

WMO Secretary-General Petteri Taalas told reporters in Geneva that many people believe the climate issue is "solved...since we reached a nice agreement in Paris."But,he said,"We haven't changed our behavior yet."

1. The author wrote Paragraph 1 to_______.
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B.explain the causes of hotter weather
C.warn the world of global warming
D.introduce the main topic of the passage
2. Which of the following statements is true?
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B.The high temperature only increases on the surface of the earth.
C.The records of high temperature in the first two months of 2016 made climate scientists shocked and worried.
D.the high temperature was mainly caused by El Nino.
3. It can be inferred that ________.
A.the high temperature will result in natural disasters around the world according to WMO
B.The problem of high temperature will be solved with the disappearance of El Nino
C.Scientists have different opinions on the causes of high temperature of the earth
D.Since we reached a nice agreement in Paris,we needn't worry about the increase of temperature
4. How does the passage mainly develop?
A.By making comparisons.
B.By analyzing the results and causes.
C.By providing examples.
D.By following the order of time.
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名校
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【推荐3】More than 40 percent of Antarctica’s ice shelves have reduced in the past 25 years, potentially accelerating sea level rise by allowing more landice to flow into the ocean.

    1     They play a critical role in slowing the flow of ice on land into the ocean by essentially acting as a wall and surround nearly the entire coastline of Antarctica. When ice shelves thin or retreat(消退), ice on the land can flow into the ocean more quickly and accelerate sea level rise.

Healthy ice shelves naturally retreat and grow over time. An ice shelf is continuously flowing and advancing but will also lose mass through melting or calving, which is when its front breaks off into the ocean.    2     But the large portion of steadily shrinking ice shelves shows this natural cycle is off.

In West Antarctica, the Getz Ice Shelf experienced some of the biggest ice losses, shedding 1.9 trillion tons of ice over the study period. Most ice shelves in East Antarctica however, increased in volume or stayed the same.     3     Region is protected by a band of cold water at the coast, which helps keep nearby warm water at bay. Even so, the study still showed pockets of shrinking ice shelves, and researchers are still investigating the reasons.     4    

The current ice shelf data set is not long enough for researchers to definitively make climate change connection yet, but it would be a ” remarkable coincidence if the natural variability in ice shelves were just that much larger.     5     But we don’t need to hit it before seeing an effect on the planet.

A.Then it can gain ice from the land and grow again
B.Ice shelves are massive floating sections of ice extending from glaciers on land.
C.The east is not as exposed to the warm water like the other side of the continent.
D.The thinning of the ice shelves has shown up in the surrounding environment, too.
E.Ice shelves not just the big ones, are. steadily losing mass over time with no sign of recovery
F.One theory is that the warmer water on the western side could be slowly coming in the region.
G.Additionally, climate models predict ice shelves will steadily shrink in a warming world as observed, eventually hitting a tipping point for ice sheet collapse.
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