静态箱-气相色谱法CO_2和CH_4通量观测的质控方法研究  

Research of Quality Control Measures in Greenhouse Gase Flux Observation Using Static Closed Chamber-GC Technique

作　　者：顾帅[1] 周凌晞[1] 刘立新[1] 王木林[1] 温民[1] 

机构地区：[1]中国气象科学研究院,中国气象局大气成分观测与服务中心,中国气象局大气化学重点开放实验室,北京100081

出　　处：《气象》2010年第8期87-91,共5页Meteorological Monthly

基　　金：国家自然科学基金(40775078;40905066);科技部国际科技合作重点项目(2007DFA20650);财政部公益性行业(气象)科研专项(GYHY200806026);中国气象科学研究院基本科研业务费项目(2009Y003)

摘　　要：通量观测与大气本底浓度观测采用统一的分析—质控—标校流程和方法对准确评估大气温室气体源汇至关重要。静态箱-气相色谱法是研究陆地生态系统CO_2和CH_4通量的重要手段。本研究首先在实验室对存储样品的气袋进行检测与处理,包括剖析气袋结构,测试气袋在一定时间内对气样中CO_2及CH_4浓度的影响,根据测试结果对采样、运输流程进行优化,确保样品尽量减少污染;其次,采用与温室气体本底浓度分析—质控—标校相一致的流程和方法,以保证两种观测方法所获取数据的准确可比;最后,将本研究中优化的流程和方法应用于2007年7月至2008年7月期间青海瓦里关自由放牧地和围栏草地开展的温室气体通量观测实验,获取了较高质量的CO_2及CH_4通量观数据并进行了初步分析。Application of static closed chamber/GC technique to studying fluxes of CO2 and CH4 of terrestrial ecosystems can provide the necessary basis for exploring the sources and sinks of greenhouse gases in the atmosphere.Therefore,using the consistent analysis—quality control—calibration procedures and methods between the flux observation system and the atmospheric background concentration observation system is crucial.In the research,firstly,the air bags storing samples were detected and deled,including the structure analysis of airbags,testing the influence of airbags on the concentrations of CO2 and CH4 storing in the airbags in a certain period of time etc.In accordance with the testing results,some adjustments were applied in the sampling and transportation to minimize pollution of the samples;Secondly,rigorous procedures and methods that were consistent with that of analyzing and correcting the concentration of atmospheric background greenhouse gases were used to analyze the samples,ensuring the data obtained by using the two different observing methods could be accuracy compared;Finally,the optimized processes and methods in this study have been applied to greenhouse gase flux observing experiment on grazed grassland and fenced grassland at Mt.Waliguan during July 2007—July 2008.High-quality observing data of fluxes of CO2 and CH4 were obtained and a preliminary analysis of CO2 and CH4 fluxes was carried out.

关 键 词：静态箱-气相色谱法 气袋测试 分析标校 质量控制 草地温室气体通量 

分 类 号：X142[环境科学与工程—环境科学]