| 北京地区稻田上空甲烷浓度的监测 |
| 摘要点击 743 全文点击 819 投稿时间：1995-08-12 |
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| 中文关键词 甲烷 水稻 排放源 生物圈 大气痕量气体 |
| 英文关键词 methane rice monitoring Beijing area |
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| 中文摘要 |
| 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。 |
| 英文摘要 |
| Monitoring 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. |
