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EI Nino is the term used for the period when sea surface temperatures are above normal off

the South American coast along the equatorial Pacific, sometimes called the Earth's heartbeat, and is a dramatic but mysterious climate system that periodically rages across the Pacific.

EI Nino means "the little boy" or "the Christ child" in Spanish, and is so called because its warm current is felt along coastal Peru and Ecuador around Christmas. But the local warming is just part of an intricate set of changes in the ocean and atmosphere across the tropical Pacific, which covers a third of the Earth's circumference. Its intensity is such that it affects temperatures, storm tracks and rainfall around the world.

Droughts in Africa and Australia, tropical storms in the Pacific, torrential rains along the Californian coast and lush greening of Peruvian deserts have all been ascribed to the whim of EI Nino. Until recently it has been returning about every three to five years. But recently it has become more frequent—for the first time on record it has returned for a fourth consecutive year—and at the same time a giant pool of unusually warm water has settled clown in the middle of the Pacific and is showing no signs of moving.

Climatologists don't yet know why, though some are saying these aberrations may signal a worldwide change in climate. The problem is that nobody really seems sure what causes the EI Nino to start up, and what makes some stronger than others. And this makes it particularly hard to explain why it has suddenly started behaving so differently.

In the absence of EI Nino and its cold counterpart, La Nina, conditions in the tropical eastern Pacific are the opposite of those in the west: the east is cool and dry, while the west is hot and wet. In the east, it's the winds and currents that keep things cool. It works like this. Strong, steady winds, called trade winds, blowing west across the Pacific drag the surface water along with them. The varying influence of the Earth's rotation at different latitudes, known as the Coriolis effect, causes these surface winds and water to veer towards the poles, north in the northern hemisphere and south in the southern hemisphere. The surface water is replaced by colder water from deeper in the ocean in a process known as upwelling.

The cold surface water in turn chills the air above it. This cold dense air cannot rise high enough for water vapor to condense into clouds. The dense air creates an area of high pressure so that the atmosphere over the equatorial eastern Pacific is essentially devoid of rainfall.

The writer begins the text with

A.a description of a scene.

B.a root cause of EI Nino.

C.a narrative of an event.

D.a definition of EI Nino.

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更多“EI Nino is the term used for t…”相关的问题
第1题
It can be inferred that? hen EI Nino and La Nina occurs simultaneously,A.the Coriolis effe

It can be inferred that? hen EI Nino and La Nina occurs simultaneously,

A.the Coriolis effect may bring trade winds to the poles.

B.the atmosphere in the Pacific will be cool and dry.

C.the conditions in the eastern Pacific would be hot and wet.

D.the cold vapor will rise high enough to make for rainfall.

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第2题
Paragraphs 2 and 3 are written toA.discuss the causes of climatic irregularities.B.exempli

Paragraphs 2 and 3 are written to

A.discuss the causes of climatic irregularities.

B.exemplify the abnormal effects of EI Nino.

C.explain the way in which EI Nino develops.

D.show the recent observations of scientists.

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第3题
Paragraphs 2 and 3 are written to ______.A.discuss the causes of climatic irregularities.B

Paragraphs 2 and 3 are written to ______.

A.discuss the causes of climatic irregularities.

B.exemplify the abnormal effects of EI Nino.

C.explain the way in which El Nino develops.

D.show the recent observations of scientists.

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第4题
El Nino is the term used for the period when sea surface temperatures are above normal off
the South American coast along the equatorial Pacific, sometimes called the Earth's heartbeat, and is a dramatic but mysterious climate system that periodically rages across the Pacific.

El Nino means "the little boy" or "the Christ child" in Spanish, and is so called because its warm current is felt along coastal Peru and Ecuador around Christmas. But the local warming is just part of an intricate set of changes in the ocean and atmosphere across the tropical Pacific, which covers a third of the Earth's circumference. Its intensity is such that it affects temperatures, storm tracks and rainfall around the world.

Droughts in Africa and Australia, tropical storms in the Pacific, torrential rains along the Californian coast and lush greening of Peruvian deserts have all been ascribed to the whim of El Nino. Until recently it has been returning about every three to five years. But recently it has become more frequent—for the first time on record it has returned for a fourth consecutive year—and at the same time a giant pool of unusually warm water has settled down in the middle of the Pacific and is showing no signs of moving.

Climatologists don't yet know why, though some are saying these aberrations may signal a worldwide change in climate. The problem is that nobody really seems sure what causes the El Nin o to start up, and what makes some stronger than others. And this makes it particularly hard to explain why it has suddenly started behaving so differently.

In the absence of El Nino and its cold counterpart, La Nina, conditions in the tropical eastern Pacific are the opposite of those in the west. the east is cool and dry, while the west is hot and wet. In the east, it's the winds and currents that keep things cool. It works like this. Strong, steady winds, called trade winds, blowing west across the Pacific drag the surface water along with them. The varying influence of the Earth's rotation at different latitudes, known as the Coriolis effect, causes these surface winds and water to veer towards the poles, north in the northern hemisphere and south in the southern hemisphere. The surface water is replaced by colder water from deeper in the ocean in a process known as upwelling.

The cold surface water in turn chills the air above it. This cold dense air cannot rise high enough for water vapor to condense into clouds. The dense air creates an area of high pressure so that the atmosphere over the equatorial eastern Pacific is essentially devoid of rainfall.

The writer begins the text with ______.

A.a description of a scene.

B.a root cause of El Nino.

C.a narrative of an event.

D.a definition of EI Nino.

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第5题
______ has warmed the waters off Alaska.A.El NinoB.The sunC.Over-populationD.Pressure

______ has warmed the waters off Alaska.

A.El Nino

B.The sun

C.Over-population

D.Pressure

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第6题
In exploring the effect of El Nino, the author mainly focuses on ______.A.its violence.B.i

In exploring the effect of El Nino, the author mainly focuses on ______.

A.its violence.

B.its conditions.

C.its regularity

D.its features.

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第7题
It can be inferred that when El Nino and La Nina occurs simultaneously, ______.A.the Corio

It can be inferred that when El Nino and La Nina occurs simultaneously, ______.

A.the Coriolis effect may bring trade winds to the poles.

B.the atmosphere in the Pacific will be cool and dry.

C.the conditions in the eastern Pacific would be hot and wet.

D.the cold vapor will rise high enough to make for rainfall.

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第8题
He used to feel confident () language ability.

A.in the term of

B.in terms of

C.in term of

D.in a term of

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第9题
What is the trade term? Please give an example.
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第10题
The term "fisticuffs" (Paragraph 2) probably meansA.anticipationB.fightingC.reputationD.ir

The term "fisticuffs" (Paragraph 2) probably means

A.anticipation

B.fighting

C.reputation

D.irony

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