在２０世纪８０年代后期 ,冰核记录揭示出大约每隔１００ｋａ发生的由冰期到暖期的急剧气候变化可通过温室气体甲烷浓度的快速增加加以对比。最初 ,这些增高被认为是湿地环境的细菌作用造成的。Ｎｉｓｂｅｔ（１９９０）根据以水合物形式贮存在永冻地区和大陆边缘的数量巨大的 In the late 1980s, ice-core records revealed that glacial-to-warm dramatic climate changes occurring every about 100 ka can be compared with the rapid increase in greenhouse gas methane concentrations. Initially, these increases were thought to be caused by the bacterial action of the wetland environment. Nisbet (1990) based on the huge amount of hydrate stored in the permafrost and continental margin