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: 欧美一级毛片一级毛片 | 图片区 日韩 欧美 亚洲 | 亚洲精品麻豆一区二区 | 五月伊人网 | 欧美日韩国产超高清免费看片 | 三级毛片免费看 | miya亚洲私人影院在线 | 国产在线欧美日韩精品一区二区 | 视频国产在线 | 亚洲一级片免费看 | 久久精彩视频 | 91丝瓜视频最新版 | 色屁屁在线 | 一级毛片免费视频 | 青青青国产依人在线视频97 | 高清在线亚洲精品国产二区 | 日本日韩欧美 | 日韩综合久久 | 黄色一及毛片 | 在线观看麻豆 | 五月天婷婷一区二区三区久久 | 精品大臿蕉视频在线观看 | 日韩一区二区三区四区区区 | 国产成人精品亚洲777图片 | 日韩一级大毛片欧美一级 | 男女做污污无遮挡激烈免费 | 久草在现 | 日韩综合网 | 无码日韩精品一区二区免费 | 国产在线看不卡一区二区 | 全黄a免费一级毛片人人爱 全黄一级裸片视频在线观看 | 日本在线毛片视频免费看 | 亚洲第一第二区 | 国产成人性毛片 | 国产丰满主播丝袜勾搭秀 | 91福利视频合集 | 亚洲综合一 | 亚洲成a人片在线观看中文 亚洲成a人片在线观看中文动漫 | 乡下女色又黄一级毛片 | 日本三级免费 | 麻豆成人在线 |