冰:北极和南极暖化
在北极大气中的甲烷急遽上升,在5年内增加了33 %。 35 (爱丁堡大学科学家保罗_帕玛〔Paul Palmer〕,2010年) 西伯利亚永冻层融化释出的甲烷,是先前认为的5 倍。36 (凯蒂_沃尔特博士〔Katie Walter〕,2006年) 东西伯利亚北极大陆架 的海底浅层永冻土也呈现出不稳定情况,并释放出大量的甲烷。37 (国际西伯利亚陆棚研究〔ISSS〕主任暨美国费尔班阿拉斯加大学教授艾格_塞米尔托夫〔Igor Semiletov〕,2010年) 北极冻原正在释出的甲烷和氧化亚氮,比之前所估计的高出很多。38 (加拿大卑诗大学葛雷格_亨利教授〔Greg Henry〕) 一些科学家将融冰中的北极称为「定时炸弹」。39,40,41 今年夏天,北极海冰面积缩小到史上第3低纪录,面积萎缩最严重的3次都发生在过去4年内。 42 (美国国家冰雪资料中心〔NSIDC〕2010 年度报告)) 在目前的暖化情况下,北极不太可能回复以往的状态。 43 (美国国家海洋和大气管理局2010年更新的北极报告) 2009至2010年冬季,北极暖化为北美东部和欧亚大陆东部带来了酷寒的冷风和暴风雪。 44,45,46,47 (美国国家海洋和大气管理局太平洋海洋环境实验室〔Pacific Marine Environmental Laboratory〕詹姆士_奥弗兰博士〔James Overland〕,2010年) 整体暖化造成现在北极每年融冰期比30 年前延长了20 天,这表示更多的热气会被北极海吸收,对海洋生态系统和北美气候造成很大的冲击。 48 (美国太空总署,2010年) 由于冰层逐渐消失,极地探险者首次能够以玻璃纤维小船进行环绕北极之旅;在10年前,因为水道被冰封住,若没有破冰船根本办不到。 49 挪威极地探险家布尔格_奥斯兰〔Borge Ousland〕,其航程从2010年6月开始。) 参考来源
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地球:我們可愛的家
南極冰融:訪問彼得‧貝瑞特教授
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冰河学家警告严重的冰融 - 2010年4月11日
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