三级aa视频在线观看-三级国产-三级国产精品一区二区-三级国产三级在线-三级国产在线

  Home>News Center>Life
         
 

How global warming can lead to a big chill
(Agencies)
Updated: 2004-12-04 09:06

Global warming could lead to a big chill in the North Atlantic, at least if history is anything to go by, researchers reported on Friday.


This graphic released by the Arctic Climate Impact Association indicates the seasonal melt extent of the Greenland Ice Sheet in 2002. [AP]
They published evidence to support a popular theory that rising temperatures caused a big melt of polar ice 8,200 years ago, causing a freshwater flood into the salty North Atlantic.

This would have changed the flow of the balmy Gulf Stream and in just a few years, average temperatures plummeted, ushering in a deep freeze that lasted a century or more, researchers have proposed.

Writing in the Dec. 11 issue of Geophysical Research Letters, Torbjorn Tornqvist, an assistant professor of earth and environmental sciences at the University of Illinois at Chicago, says he has evidence that this happened.

"Few would argue it's the most dramatic climate change in the last 10,000 years," Tornqvist said in a statement. "We're now able to show the first sea-level record that corresponds to that event."

Tornqvist and some graduate students found the evidence along the Gulf of Mexico off the southern U.S. coast.

They found peat deposits that would have been formed under rising sea levels. Working with researchers in the Netherlands, they dated the material to 8,200 years ago.

Their composition suggested they were made when a saltwater marsh was abruptly flooded and turned into a lagoon.

"Climatologists urgently need this type of information to run their climate models in order to understand the conditions that can produce such an abrupt climate change," Tonrqvist said.



Miss World pageant to return to Sanya in 2005
From 'Hero' to zero in Zhang Yimou's films
Kidman lands in 'Guinness Book of Records'
  Today's Top News     Top Life News
 

EU urged to lift arms sales ban at early date

 

   
 

China to bail out 2 more state banks

 

   
 

Landslide kills 16, traps 49 villagers

 

   
 

Economy expected to grow stably in 2005

 

   
 

12 criminals in Xi'an lottery fraud sentenced

 

   
 

Juneng calcium tablets not unsafe: Officials

 

   
  Whistleblower up for award among China's elites
   
  'Blog' tops words of the year
   
  Miss World beauties defend relevance of contest
   
  A noble find reveals the life in the past
   
  Unhappy McDonald's free meals a e-mail scam
   
  Health alert for body cleansing
   
 
  Go to Another Section  
 
 
  Story Tools  
   
  Related Stories  
   
Europe is warned of changing climate
   
Global warming ignites tempers, even in a movie
   
Europe's heat wave raises global warming concerns
   
Premier Zhu backs Maldives battle over rising sea level
  Feature  
  HK veteran songwriter James Wong passed away at 64  
Advertisement
         
主站蜘蛛池模板: 国产午夜视频在永久在线观看 | 亚洲第一页在线视频 | 黑人操亚洲人 | 成人免费一级在线播放 | 污污网站在线免费观看 | 国产精品400部自产在线观看 | 日本制服丝袜在线 | 最新亚洲国产有精品 | 午夜视频久久久久一区 | 久久青青草视频 | 一级黄视频 | 永久免费观看午夜视频在线 | 精品999| a级毛片免费在线观看 | 国产成人精品视频一区 | 国产1区2区在线观看 | 欧美成人四级剧情在线播放 | 欧美一区二区三区免费 | 久久视热这只是精品222 | 午夜性影院 | 日韩成人影院 | 久久精品草 | 一区二区三区无码高清视频 | 国产麻豆影院 | 狼人久久尹人香蕉尹人 | 久久在线免费观看视频 | 色婷婷五| 激情影院成人区免费观看视频 | 99久在线观看 | 一级做a爰片性色毛片刺激 一级做a爰片性色毛片视频图片 | 特级av毛片免费观看 | 2021年韩国r级理论片在线观看 | 欧洲免费无线码一二区 | 美女视频大全美女视频黄 | 国产精品欧美亚洲韩国日本不卡 | 国产女人综合久久精品视 | 九九精品视频在线观看 | 亚洲免费影院 | 国产午夜精品久久久久免费视小说 | 久久婷婷午色综合夜啪 | 免费成人黄色大片 |