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GRE阅读题目解析:厄尔尼诺现象

2016-12-29 14:25:00来源:网络

  GRE阅读题目解析:厄尔尼诺现象】GRE考试考什么?GRE阅读是重点。新东方在线GRE频道为大家带来GRE阅读题目解析:厄尔尼诺现象,答案见下一页,希望对大家GRE备考有所帮助。更多精彩尽请关注新东方在线GRE频道!

  查看全部:GRE阅读答案解析(汇总)

  GRE阅读题目解析:厄尔尼诺现象

  P2

  It has long been known that during an El Nino, two conditions exist: (1) unusually warm water extends along the eastern Pacific, principally along the coasts of Ecuador and Peru, and (2) winds blow from the west into the warmer air rising over the warm water in the east.

  These winds tend to create a feedback mechanism by driving the warmer surface water into a "pile" that blocks the normal upwelling of deeper, cold water in the east and further warms the eastern water, thus strengthening the wind still more.

  The contribution of the recent model is to show that the winds of an El Nino, which raise sea level in the cast, simultaneously send a signal to the west lowering sea level.

  According to the model, that signal is generated as a negative Rossby wave, a wave of depressed, or negative, sea level, that moves westward parallel to the equator at 25 to 85 kilometers per day. (158 words)

  2. According to the passage, which of the following features is characteristic of an El Nino?

  (A) Cold coastal water near Peru

  (B) Winds blowing from the west

  (C) Random occurrence

  (D) Worldwide effects

  (E) Short duration

  For the following question, consider each of the choices separately and select all that apply

  3. It can be inferred from the passage that which of the following would result fairly immediately from the cessation of the winds of an El Nino?

  (A) Negative Rossby waves would cease to be generated in the eastern Pacific.

  (B) The sea level in the eastern Pacific would fall.

  (C) The surface water in the eastern Pacific would again be cooled by being mixed with deep water.

  点击下一页查看答案:

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