The mystery of the Pacific“ cold tongue”太平洋“冷舌”之谜

孙朝岚

主题语境：自然环境篇幅：345词建议用时：7分钟

1 A narrow region of the eastern Pacific Ocean has been getting colder for the past 30years， challenging global trends and confusing many scientists. Over at least threedecades， the region has cooled by roughly half a degree， which has been causing scien?tists to wonder how long that will hold.

2 The unusual phenomenon， known as the“ cold tongue”， is affecting a vast area ofocean west of South America. Scientists are not entirely certain what is keeping the“ coldtongue” cool. Richard Seager， from the Earth Observatory at Columbia University， said onefactor appears to be trade winds in the equatorial region， which carry warm water away fromthe surface， stimulating cooler water to rise.“ The trade winds blow from east to west acrossthe tropical Pacific Ocean，” Seager said.“ As the water is driven away from the surface，water flows up from below. And since the water below the surface is cold， this creates the‘cold tongue.”

3 Yet despite the effect of these winds， the “ cold tongue” has puzzled scientists，because advanced climate computer models suggest that the waters should have beenwarming for decades at a faster rate than the rest of the Pacific due to rising greenhouse gasemissions.

4 Pedro DiNezio of the University of Colorado Boulder， considers it “ the mostimportant unanswered question in climate science”. Scientists can't predict when it willend or start warming since the cause is unknown. According to New Scientist， this hashuge worldwide implications， including determining California's permanent droughtand Australias wildfires. More profoundly still， it could even alter the extent of climatechange globally by understanding how sensitive Earth's atmosphere is to rising green?house gas production.

5 Despite this， the overall ocean temperatures are rising. Solving the puzzle of the“cold tongue” isnt about proving climate models wrong. Rather， the“ cold tongue” is thelast big piece of the puzzle. Fit that in and we can build a more accurate picture of how lifewill change in a warming world and how best to prepare for that future.

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1. What may be the cause of the“ cold tongue”？

A. The arrival of ocean currents.

B. Trade winds in the equatorial regions.

C. The change in the direction of water flow.

D. The temperature differences between sea and land.

2. Why are scientists confused about the“ cold tongue” phenomenon？

A. It has lasted for many years.

B. It forms a minor ocean ecosystem.

C. It contradicts the global warming trend.

D. It mirrors increasing carbon emissions.

3. What makes solving the“ cold tongue” puzzle important？

A. It can help predict droughts in California.

B. It contributes to adjusting ocean temperatures.

C. It can help improve the accuracy of climate models.

D. It offers insights into dealing with future climate events.

4. What is the purpose of the text？

A. To stress the effect of climate change.

B. To introduce an unusual phenomenon.

C. To explain reasons for strange natural disasters.

D. To appeal to people to pay more attention to the ocean.

Language

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Ⅰ. Text?centered chunks

appear to 似乎；好像

trade wind 信风

in the equatorial region 在赤道地区

drive sb away 使离去

greenhouse gas emissions 温室气体排放

prepare for为……做准备

Ⅱ. Difficult sentences in the text

1. Over at least three decades， the region has cooled by roughly half a degree， whichhas been causing scientists to wonder how long that will hold. 在至少30年的时间里，该地区已经冷却了大约半度，这让科学家们想知道这种情况还能持续多久。

【点石成金】本句中，which引导定语从句，在从句中作主语，指代前面的整个句子；how long引导宾语从句。

2. Scientists cant predict when it will end or start warming since the cause isunknown. 由于原因不明，科学家们无法预测它何时会结束或开始变暖。

【点石成金】本句中，when引导宾语从句，since引导原因状语从句。