研究论文
周凌怠,汤洁,张晓春,季军,王志邦,DouglasWorthy,MicheleErnst,NeilTrivett.气相色谱法观测本底大气中的甲烷和二氧化碳[J].环境科学学报,1998,18(4):356-361
气相色谱法观测本底大气中的甲烷和二氧化碳
- IN SITU GAS CHROMATOGRAPHIC MEASUREMENT OF ATMOSPHERIC METHANE AND CARBON DIOXIDE
- 周凌怠
- 中国气象科学研究院大气化学研究所, 北京 100081
- 汤洁
- 中国气象科学研究院大气化学研究所, 北京 100081
- DouglasWorthy
- At mospheric Environment Service, Toronto, CANADA
- MicheleErnst
- At mospheric Environment Service, Toronto, CANADA
- NeilTrivett
- At mospheric Environment Service, Toronto, CANADA
- 摘要:根据世界气象组织全球大气监测网(WMO/GAW)开展全球温室气体监测的要求,建立了气相色谱(GC)法甲烷和二氧化碳(CH4/CO2)连续观测系统。概述了该系统在加拿大大气环境局(AES)5个月的组装调试,以及在中国大气本底基准观象台(CGAWBO)一年多时间里的业务运行和标定情况。组装调试和运行标定,与红外吸收(NDIR)法、气瓶采样 实验室分析(FLASK)法数据,以及与国内外其它台站观测资料的对比结果表明,该系统具有良好的线性、灵敏度、精度和准确度,其设计完全符合WMO全球大气本底测量的要求,具有高自动化的操作性能和严格的质量控制;所获我国大陆上空本底大气中CH4和CO2的浓度资料具有国际可比性,观测结果反映了我国西部高原地区大气CH4和CO2的本底变化特征。
- Abstract:A highly automatic gas chromatographic system for continuous measurement of atmospheric methane and carbon dioxide was established. The setup of the system, the tested results in AES, Canada, as well as its calibration in CGAWBO are presented. It is found out that the linearity, sensitivity, precision, and accuracy of the system can meet the standard of WMO's baseline watch on global atmosphere. The system was applied for measurement of atmospheric methane and carbon dioxide over Qinghai Xizang plateau in western China.
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