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ThesceneintheHollywoodmovieTheDayAfterTomorrow,whenglobalwarmingcouldsoonturnthegloba... The scene in the Hollywood movie The Day After Tomorrow, when global warming could soon turn the global climate (气候) into a new ice age, may never occur, according to new research.

The next ice age could be 15,000 years away, say European scientists who last month announced a continuous record of 7. 40,000 years of climate data (数据) obtained from the Antarctic ice.

Scientists from 10 nations have now almost completely drilled through a 3,000-meter. depth of ice high in the Antarctic mainland. They figure out that the area where summer temperatures can fall to -40℃, has at least 900,000 years of snowfalls, kept as neatly as the growth rings of a tree. And the ice and air caught in each layer(℃层) have begun to answer questions about the climates in the past.

The results show that there have been eight ice ages in the past 740, 000 years and eight warmer periods. And by comparing the pattern of global conditions today with those of the past, the researchers reported in Nature that the present warm period could last another 15, 000 years.

Research suggests that there is a very close connection between greenhouse gas levels and global average temperatures. It also shows that carbon dioxide (二氧化碳) levels are the highest for at least 440,000 years.

“If people say to you: the greenhouse effect is a good thing because we would go into an ice age oth.0pt 189.0erwise, our data say no, a new ice age is not hanging over our heads,” said Eric Wolff from the British Antarctic Survey. “Now we have eight examples of how the climate goes in and out of ice ages… and you can learn what the rules are that go into the climate models that tell us about the future. ”

Scientists found that whenever temperatures rose in the frozen record, so did carbon dioxide level. “In 440,000 years we have never seen greenhouse gas get as thick as it is today,” said Dr Wolff.
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泪火麒麟
2010-12-17 · 超过26用户采纳过TA的回答
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在好莱坞电影《后天》的场景,当全球变暖可能很快就会变成一个新的冰河时代的全球气候(气候),可能永远不会发生,根据新的研究。

下一个冰河期15,000年之后,上月公布了欧洲科学家7的连续记录。 40000年的气候资料(数据)获得南极冰。

来自10个国家的科学家们现在几乎完全通过3000米的钻孔。冰在南极大陆的深度高。他们发现的地区,夏季气温可降至-40℃,至少有90万大雪里,尽可能地整齐像树木的年轮。而冰和空气卷入每一层(℃层)已经开始回答有关过去的气候问题。

结果表明,已在过去740冰河时代,1000年,温暖时期。并通过比较与过去的全球环境格局的今天,研究人员在Nature,目前的暖期可能持续了15,000年。

研究表明,有一间温室气体浓度和全球平均温度非常密切的联系。它也表明,二氧化碳(二氧化碳)的水平是至少44.0万年的最高水平。

“如果有人告诉你:温室效应是一件好事,因为我们将进入一个冰河时代oth.0pt189.0erwise,我们的数据说不行,一个新的冰河时代是不挂在我们头上,说:“从埃里克沃尔夫英国南极考察。 “现在我们已经有八年的气候如何进入和退出冰河时代...,你可以学到什么规则是进入气候模型告诉我们的未来的例子。 “

科学家发现,每当气温上升冻结纪录,所以没有二氧化碳的水平。 “在44.0万年我们从来没有见过的温室气体得到厚,因为它是在今天,“沃尔夫博士说。
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