{{B}}El Nino{{/B}} While
some forecasting methods had limited success predicting the 1997 El Nino a few
months in advance, the Columbia University researchers say their method call
predict large El Nino events up to two years in advance. That would be good news
for governments, farmers and others seeking to plan for the droughts and heavy
rainfall that El Nino can produce in various parts of the world.
Using a computer the researchers matched sea-surface temperatures to later
El Nino occurrences between 1980 and 2000 and were then able to anticipate El
Nino events dating back to1857, using prior sea-surface temperatures. The
results were reported in the latest issue of the journal Nature.
The researchers say their method is not perfect, but Bryan C. Weare. a
meteorologist at the University of California, Davis, who was not involved in
the work, said it "suggests'El Nino is indeed predictable.'"
"This will probably convince others to search around more for even better
methods." said Weare. He added that the new method "makes it possible to predict
El Nino at long lead.times." Other models also use sea-surface temperatures, but
they have not looked as far back because they need other data, which is only
available for recent decades, Weare said. The ability to predict
the warming and cooling of the Pacitic is of immense importance. The 1997 El
Nino, for example, caused an estimated $ 20 billion in damage worldwide, offset
by beneficial effects in other areas, said David Anderson, of the European
Centre for Medium Range Weather Forecasts in Reading England. The 1877 El Nino,
meanwhile, coincided with a failure of the Indian monsoon and a famine that
killed perhaps 40 million in India and China, prompting the development of
seasonal forecasting, Anderson said. When El Nino hit in 1991
and 1997, 200 million people were affected by flooding in China alone, according
to a 2002 United Nations report. While predicting smaller El
Nino events remains tricky, the ability to predict larger ones should be
increased to at least a year if the new method is confirmed. El
Nino tends to develop between April and June and reaches its peak between
December and February. The warming tends to last between 9 and 12 months and
occurs every two to seven years The new forecasting method does
not predict any major El Nino events in the next two years, although a weak
warming toward the end of this year is possible. El Ninon.
厄尔尼诺现象 equatorial adj.赤道的 occurrence n.
发生 meteorologist n.气象学家 offset v. 抵销
lead adj. 提前的 monsoon n.季风 tricky
adj.难以捉摸的
单选题
The method used by the Columbia University researchers can predict El Nino a few months in advance.
【正确答案】
B
【答案解析】[解析] 利用句子中的特征词Columbia University researchers和a few months in advance作为答案线索,这样发现答案相关句:While some forecasting methods had limited SBccess predicting the 1997 E1 Nino a few months in advance,the Columbia University researchers say their method can predict large El Nino events up to two years in advance,问题句说“提前几个月”,而原文说“最远能提前到两年”,因此可见问题句的内容中有与原文不一致的地方,因此判断该句“不正确”。
单选题
The Columbia University researchers studied the relationship between the past El Nino occurrences and sea-surface temperatures.
【正确答案】
A
【答案解析】[解析] 利用句子中出现的核心结构EI Nino occurrences和sea-surface temperatures作为答案线索,这样发现答案相关句:
Nino occurrences between l980 and 2000.该划线结构的含义基本上与问题句的内容一致,还需要辨别the researchers是否就是"The Columbia University researchers”,而前文中出现的就是"The Columbia University researchers”,问题句的内容都在原文中有呼应的内容,因此判断该句的说法正确。
单选题
The Columbia University researchers are the first to use sea-surface temperatures to match the past El Nino occurrences.
【正确答案】
C
【答案解析】[解析] 该题涉及到的内容和前面出现的问题有关,注意到题干中出现的特征词thefirst,因此判断对该词的确认是关键。利用该词作为答案线索,这样发现文章中没有这个词山现。因为该句是概括总结句,因此再利用句子㈩现的核心结构sea-surface temperatures和the past EI Nino occurrences作为答案线索,发现涉及这两个结构的句子所表达的句意都与问题句的内容无关,因此判断问题句的说法“没提到”。
单选题
Weare's contribution in predicting E 1 Nino, was highly praised by other meteorologists.
【正确答案】
C
【答案解析】[解析] 利用句子中出现的特征词Weare作为答案线索,这样发现答案相关句:but Bryan“suggests‘El Nino is indeed predictable.’”He added that the new method“makes it possible to predict El Nino at long lead times.”Other models also use sea-surface recent decades,Weare said.这些涉及Weare的句子在内容上都没有讲述是否Weare在预测厄尔尼诺现象方面作出了贡献,也没有提到他的贡献是否得到了其他气象学家的高度赞扬。
单选题
According to a Chinese report, the flooding in China caused by El Nino in 1991 and 1997 affected 200 million Chinese people.
【正确答案】
B
【答案解析】[解析] 利用句子中出现的特征词Chinese report,in l991 and l997 和 200 million Chinese people作为答案线索,这样发现答案相关句:When El Nino hit in l991 and l997,200 million people were affected by flooding in China alone,according to a 2002 Uhited Nations report.该句的内容与问题句的内容不一致。
单选题
It takes about eight months for El Nino to reach its peak.
【正确答案】
A
【答案解析】[解析] 该问题句内容和结构都较简单,句子中出现了一个数字(8个月),因此猜测对于这个数字的辨别是解题的关键。借助eight months和句子中的核心词peak作为答案线索,这样找到答案相关句:E1 Nino tends to develop bet ween Apnl and June and reaches its peak between December and Febmary.借助该句含义可以推出“El Nino需要大约8个月达到峰值”。
单选题
A special institute has been set up in America to study El Nino.
【正确答案】
C
【答案解析】[解析] 利用句子中出现的核心词A special institute和America作为答案线索,这样发现文章中根本就没有提到“在美国建立一所特别的研究院”,因此该句为“没提到”。