| 天然气水合物的特征及环境意义 |
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| 作者姓名： | 徐国强 吕炳全 |
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| 作者单位： | 同济大学海洋地质与地球物理系,上海 |
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| 摘 要： | 天然气水合物是由甲烷等气体和水分子组成的类冰状的固态物质，主要分布在极地永冻层和外大陆架边缘的海洋沉积物中，赋存在天然气水合物中的碳约为１０＾１３吨，相当于全球其他化石燃料中碳含量的两倍，由于天然气水合物处于亚稳定状态。因此天然气水合物既可作为２１世纪潜在能源资源，又可以非稳定状态导致海底滑塌和滑坡等地质灾害，并可通过释放甲烷影响全球气候。
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| 关 键 词： | 天然气水合物 能源资源 海洋灾害 海洋沉积物 |
Gas Hydrates, Marine Geohazards and Climate Changes |
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| Authors: | Xu Guoqiang Lu Bingquan Wang Honggang |
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| Abstract: | Gas hydrates are ice-like crystalline solids consisitng of water molecules and natural gas, mainly methane. Based on current estimate,the total amount of methane in gas hydrates likely exceeds 10~(13)t of methane carbon,which is roughly a factor of 2 larger than the carbon present in all known fossil fuel. Because gas hydrates are metastable,changes of pressure and temperature affect their stability. Three aspects of gas hydrates are important:their energy resource potential for the 21st century, their role as a submarine geohazard,and their effects on global climate change. |
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| Keywords: | gas hydrate energy resource marine geohazard greenhouse gas climate change |
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