GRE阅读题目解析：云对地球暖化效应的作用

>>GRE阅读：GRE阅读题目解析：云对地球暖化效应的作用

>>GRE考试辅导：精品课程名师指导

P5

As of the late 1980's. neither theorists nor large-scale computer climate models could accurately predict whether cloud systems would help or hurt a warming globe. Some studies suggested that a four percent increase in stratocumulus clouds over the ocean could compensate for a doubling in atmospheric carbon dioxide, preventing a potentially disastrous planetwide temperature increase. On the other hand, an increase in cirrus clouds could increase global warming.

That clouds represented the weakest element in climate models was illustrated by a study of fourteen such models. Comparing climate forecasts for a world with double the current amount of carbon dioxide, researchers found that the models agreed quite well if clouds were not included. But when clouds were incorporated, a wide range of forecasts was produced. (125 words)

10. Select the sentence that indicates one reason the fourteen models described in the passage failed to agree.

P5

1

As of the late 1980's. neither theorists nor large-scale computer climate models could accurately predict whether cloud systems would help or hurt a warming globe.

1980 年代末，无论气象理论学家还是大规模电脑气象模型，都无法精确预测云对地球暖化效应发挥什么样的作用。

2

Some studies suggested that a four percent increase in stratocumulus clouds over the ocean could compensate for a doubling in atmospheric carbon dioxide, preventing a potentially disastrous planetwide temperature increase.

有些研究认为，海上增加 4% 的层积云可以抵消大气中二氧化碳翻倍的影响，进而阻止潜在的全球气温上升带来的危害。

3

On the other hand, an increase in cirrus clouds could increase global warming.

另一方面，卷云变多则可能加剧暖化。

4

That clouds represented the weakest element in climate models was illustrated by a study of fourteen such models.

十四种模型算法显示，云是气象模型中呈现的最不成功的因素。

5

Comparing climate forecasts for a world with double the current amount of carbon dioxide, researchers found that the models agreed quite well if clouds were not included.

假如把现在的大气二氧化碳水平加倍，比较预报结果，研究者们发现，如果不考虑云的因素，各种模型预报结果相当接近。

6

But when clouds were incorporated, a wide range of forecasts was produced. (125 words)

但如果考虑云，预报结果就变得大相径庭。

10. Select the sentence that indicates one reason the fourteen models described in the passage failed to agree.

“ But when clouds were incorporated, a wide range of forecasts was produced. ”

有点绕。

现在气象学家要用一些模型来模拟各种气候因素，推算出一个预报，如果多种模型对一个因素的预报非常接近，那么可能说明，关于这种因素的预报是相对准确的，比如温度，如果各种预报都说明天要降温，那么明天可能确实要降温，如果大家都说降温到 0 度，第二天一量差不多正好 0 度，那么这些预报在温度这一项上基本靠谱，都对了。

不考虑云的预报，各种模型的运算结果都接近，但加入云的预报，forecasts 马上变得 wide range 了，说明肯定有的算错了，不然结果不可能差那么多。

题目让我们找到暗示了十四种模型预报结果不一样的原因，就是最后一句。

为帮助各位GRE考生顺利通过考试，坦途网GRE考试频道为大家准备了全面的备考资料，欢迎了解！