北京地区稻田上空甲烷浓度的监测  

Monitoring on The Concentration of Atmospheric Methane of A Rice Cropping Region in Beijing Area

作　　者：崔平[1] 姚亨[1] 齐立文[1] 

机构地区：[1]中国环境科学研究院,中国科学院生态环境研究中心

出　　处：《环境科学》1996年第2期26-28,共3页Environmental Science

基　　金：中国科学院LAPC资助

摘　　要：通过对北京地区稻田种植区上空甲烷浓度持续２ａ的观测发现，该地区大气中１９９２和１９９３年甲烷的年平均浓度分别为１．１６，１．１７μｇ／Ｌ，且季节性变化规律以及年际变化规律有比较固定的趋势。一年中当地上空甲烷的浓度呈明显的冬春低夏秋高的趋势，且夏季甲烷浓度的变化幅度比较大。该地区甲烷浓度的日变化趋势不明显。在水稻生长期内的７、８月间，稻田上空甲烷浓度和水稻甲烷排放速率有密切的关系，动态分析表明，该地区大气中甲烷浓度年增加速率为０．２％，较以往文献报道要小。onitoring on methane concentration in the atmosphere in the rice cropping region was carried out between Oct.1991 and Nov. 1993. Results indicated that the average concentration of methane of the two testing years in the local region were 1. 16 and 1. 17 μg/L respectively. The variation of methane concentrations showed a strong seasonal pattern. The concentration and concentration deviation were high in summer and low in winter. During rice vegetation Period, the methane concentrations were closely related with the variation of methane emission rates from rice paddies indicating rice Paddies is one of the most important methane sources of the region. Running analysis showed that the average increasing rate of atmospheric methane in the region was 0. 2%, much lower than some previous reports.

关 键 词：甲烷 水稻 大气 大气监测 浓度 北京地区 

分 类 号：X831.02[环境科学与工程—环境工程]