物探与化探2017，Vol.41Issue(6)：1027-1036,10.DOI:10.11720/wtyht.2017.6.06
青藏高原湿地冻土区活动层甲烷排放特征
Methane emission characteristics of active layer in wetland permafrost area of the Tibetan Plateau
摘要
Abstract
As an important part of the earth's terrestrial carbon cycle,the Tibetan Plateau has become a hot place of warmhouse gas emission.The effect of gas hydrate exploration on ecological environment deserves much attention.In this paper,the authors studied the flux and isotope of subsurface methane in gas hydrate area of the Qilian Mountain.Some conclusions have been reached:1.Methane emission from alpine steppe and alpine meadow shows seasonal features.The maximum emission value is 19.2 mg/m2 · h and the maximum absorption value is-108 mg/m2 · h,demonstrating the role of carbon sink.2.Methane isotope data show that there exist a large number of microorganisms in the active layer of permafrost region.The methane in 10 ～ 30cm is the cause of microorganism,which is relatively active in summer and inactive in winner.The metabolic process of microorganism changes the oxidation-reduction of methane,and bacteria addicted to methane leads to the emission of methane.3.As for the occurrence state of gas hydrate and the way of exploration,the phenomenon of blast increase of methane in near-surface atmosphere does not appear.4.The emission of methane is influenced by many factors,and hence the study of temperature,moisture and PH value of soil needs further research.关键词
天然气水合物/甲烷排放/环境效应/冻土区/青藏高原Key words
gas hydrate/methane emission/ecological effect/permafrost region/the Tibetan Plateau分类
天文与地球科学引用本文复制引用
张富贵,张舜尧,唐瑞玲,王惠艳,杨志斌,周亚龙,孙忠军..青藏高原湿地冻土区活动层甲烷排放特征[J].物探与化探,2017,41(6):1027-1036,10.基金项目
中国地质调查局地质调查项目(DD20160226-2,DD20160224) （DD20160226-2,DD20160224）
中国地质科学院基本科研业务费项目(AS2016Y01) （AS2016Y01）
