地球科学进展 ›› 1997, Vol. 12 ›› Issue (1): 37 -42. doi: 10.11867/j.issn.1001-8166.1997.01.0037

全球变化研究 上一篇    下一篇

  1. 中国科学院南海海洋研究所 广州 510301
  • 收稿日期:1996-05-06 修回日期:1996-06-25 出版日期:1997-02-01
  • 通讯作者: 陈汉宗,男,1940年9月出生,副研究员,主要从事海洋地质与地球化学研究。


CHEN Hanzong, ZHOU Di   

  1. South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301
  • Received:1996-05-06 Revised:1996-06-25 Online:1997-02-01 Published:1997-02-01


Gas hydrates contains a large quantity of organic carbon which exceeds the total organic carbon from other sources. It is an important carbon reservoir in shallow geosphere. A slight variation of temperature/pressure would cause the formation/decomposition of gas hydrates,and subsequent consumption/release of methane. This exerts significant influence on global carbon cycle and greenhouse effect. The Polar regions differ from the mediate low latitudes on the feedback of gas hydrates to global climate change and galcial/interglacial alternation. Even in mediate low latitudes there exist two processes of opposite directions. The total effect of gas hydrates on global changes needs to be estimated in further researches. In China seas, there exist T P conditions suitable for the occurrence of gas hydrates. The BSR as an indication of gas hydrates has been reported in southern South China Sea. The total reserves of gas hydrates and their feedback to sea level changes in China seas may be assessed based on careful re interpretation of seismic profiles and computer simulations. This may provide an example for the marginal seas.


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