大兴安岭北部冻土中CO分布研究  

Study of Carbon Monoxide Concentration in Permafrost of the Da Hingan Mountains

作　　者：赵鹏武[1] 郭广猛[2] 魏江生[1] 王树森[1] 周梅[1] 苏日娜[1] 宋彩玲[1] 海龙[1] 

机构地区：[1]内蒙古农业大学生态环境学院,内蒙古呼和浩特010019 [2]中国科学院地理科学与资源研究所

出　　处：《冰川冻土》2008年第4期590-594,共5页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金重大项目(30590381-01);国家自然科学基金项目(30500393)资助

摘　　要：冻土中的甲烷作为重要的温室气体得到了广泛研究，而CO作为一种具有间接温室效应的气体，目前的研究还非常少，调查了大兴安岭北部兴安落叶松林地冻土中CO气体的分布，发现非过火区CO浓度普遍在21～117mL·m^-3，过火区在0～5mL·m^-3；夏季CO浓度阴坡在8～221mL·m^-3，阳坡在0～8mL·m^-3，在0～75cm深度CO浓度有逐渐上升趋势；较平缓的阴坡CO浓度明显高于较陡峭的阳坡；适当降雨有利于CO气体的产生，大雨或连续阴雨天气不利于CO的产生，大雨后1～2d内CO浓度较高，并且在不同地理位置有不同的观测结果。CO、CH4作为可燃性气体，对森林火灾有何影响，还需要做进一步研究。Carbon monoxide （CO） has an indirect effect on global warming, while it is seldom studied. In this paper, CO concentrations in permafrost of the Da Hingan Mountains were measured. It is found that CO concentration was generally 21 to 117 mL·m^-3 in the unburned soil and 0 to 15. mL·m^-3 in the burned soil. It was8 to 221mL·m^-3 in the shady slopes in summer,and 0 to 85mL·m^-3 in the sunny slopes. CO concentration increased from ground surface to 75 cm deep. This shows that temperature is a controlling factor in producing CO. Suitable rain is advantageous to produce CO. CO concentration is usually higher in 1 or 2 days after a rainfall. However, heavy rain or continual rain are disadvantageous to produce CO. Different result has been observed in different geographical position. More research is needed to verify whether CO and CH4 in permafrost benefit forest fire.

关 键 词：大兴安岭 CO气体 冻土 火灾 

分 类 号：S153.6[农业科学—土壤学]