天然气水合物的特征及环境意义  

Gas Hydrates, Marine Geohazards and Climate Changes

作　　者：徐国强[1] 吕炳全[1] 王红罡[1] 

机构地区：[1]同济大学海洋地质与地球物理系,上海200092

出　　处：《上海地质》2000年第2期24-28,共5页

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世纪潜在的能源资源,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。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.

关 键 词：天然气水合物 能源资源 海洋灾害 海洋沉积物 

分 类 号：P744.4[天文地球—海洋科学] X55[环境科学与工程—环境工程]