北极冰层厚度在一年内减少了19%

(2009-05-15 10:40:58)

  据俄罗斯科学技术网10月28日报道,科学家根据欧洲航天局从Envisat环境监测卫星上收到的数据分析发现,目前北极大部分地区的海冰厚度与去年同期相比减少了19%。

  伦敦大学学院极地观察中心的科学家利用雷达测高仪测量了2002年至2008年北极不同地区的极地冰盖的厚度。

  英国伦敦大学的科学家研究认为,越来越长的夏季导致北极冰层变薄。此前有数据表明,在过去50年里,北极冰层的厚度平均减少了约40%,北极冰层厚度减小的情况比先前预计的更加严重。研究证实,北极地区夏季延长与冰层变薄之间确实存在直接联系。

  2007年北极出现异常温暖的天气,导致大量冰雪融化,这种情况是前所未有的。今年北极的气温虽然没有打破去年的纪录,然而冰川融化现象比去年同期更为严重。科学家们目前尚无法解释这一现象。

  英国伦敦大学学院的卡塔琳娜-芝里斯博士认为,今夏的冰融现象不仅仅是受天气影响,也许还有其他因素。

  欧洲科学家研究表明,去年冬天以来,北极冰层厚度的平均指数下跌了26厘米,某些区域减少的冰层厚度甚至超过了49厘米。芝里斯博士表示,近年来记录显示北冰洋面积不断扩大,这也同温度、极地旋风及洋流等因素有关。

  欧洲航天局的西摩-拉克松博士表示,他们将继续利用环境监测卫星对北极极地冰盖减少情况进行监测。准确数据的提供只是一个时间问题,而目前这种情况已经非常明显。

  如果目前的情况持续下去,北极冰层将继续融化,甚至某些冰层会在夏季消失。冰层变薄不仅会导致海平面的抬升,更会对北极环境、生态系统等造成一系列连锁影响,其中,首当其冲的便是当地人的正常生活。此外,北极冰层的融化还将加重全球气候变暖对北半球的影响,甚至可能破坏墨西哥湾流(由墨西哥湾向东北经大西洋流至欧洲的暖流)的正常运转。

阅读( ) | 评论( ) | 收藏
个人资料

Warning: include(template/common/haoyou.php) [function.include]: failed to open stream: No such file or directory in F:veg520wwwvegedatatmptempnews10_all.php on line 374

Warning: include() [function.include]: Failed opening 'template/common/haoyou.php' for inclusion (include_path='.;C:php5pear') in F:veg520wwwvegedatatmptempnews10_all.php on line 374

Warning: include(template/common/lanmu3.php) [function.include]: failed to open stream: No such file or directory in F:veg520wwwvegedatatmptempnews10_all.php on line 377

Warning: include() [function.include]: Failed opening 'template/common/lanmu3.php' for inclusion (include_path='.;C:php5pear') in F:veg520wwwvegedatatmptempnews10_all.php on line 377

Warning: include(template/common/lanmu4.php) [function.include]: failed to open stream: No such file or directory in F:veg520wwwvegedatatmptempnews10_all.php on line 380

Warning: include() [function.include]: Failed opening 'template/common/lanmu4.php' for inclusion (include_path='.;C:php5pear') in F:veg520wwwvegedatatmptempnews10_all.php on line 380

Warning: include(template/common/lanmu5.php) [function.include]: failed to open stream: No such file or directory in F:veg520wwwvegedatatmptempnews10_all.php on line 383

Warning: include() [function.include]: Failed opening 'template/common/lanmu5.php' for inclusion (include_path='.;C:php5pear') in F:veg520wwwvegedatatmptempnews10_all.php on line 383

Warning: include(template/common/lanmu6.php) [function.include]: failed to open stream: No such file or directory in F:veg520wwwvegedatatmptempnews10_all.php on line 386

Warning: include() [function.include]: Failed opening 'template/common/lanmu6.php' for inclusion (include_path='.;C:php5pear') in F:veg520wwwvegedatatmptempnews10_all.php on line 386

Warning: include(template/common/lanmu7.php) [function.include]: failed to open stream: No such file or directory in F:veg520wwwvegedatatmptempnews10_all.php on line 389

Warning: include() [function.include]: Failed opening 'template/common/lanmu7.php' for inclusion (include_path='.;C:php5pear') in F:veg520wwwvegedatatmptempnews10_all.php on line 389

Warning: include(template/common/lanmu8.php) [function.include]: failed to open stream: No such file or directory in F:veg520wwwvegedatatmptempnews10_all.php on line 392

Warning: include() [function.include]: Failed opening 'template/common/lanmu8.php' for inclusion (include_path='.;C:php5pear') in F:veg520wwwvegedatatmptempnews10_all.php on line 392
关于本站 | 联系我们 | 意见反馈 | 友情链接 | 素友博客登记 | 素食推广我参与 | 网站地图 | 素食分类
素食文化的倡导者和推动者,中国最大的素食平台与资源中心
最佳浏览效果 IE6.0 以上版本 分辨率:1024 * 768 以上
Copyright © 2007-2009 中国素食文化传播网 All Rights Reserved 闽ICP备07008009号