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半干旱草原地-气温室气体交换速率测定
引用本文:王跃思,纪宝明,王艳芬,张文,刘广仁,杜睿,骆冬梅. 半干旱草原地-气温室气体交换速率测定[J]. 环境科学, 2000, 21(3): 6-6-10
作者姓名:王跃思  纪宝明  王艳芬  张文  刘广仁  杜睿  骆冬梅
作者单位:1. 中国科学院大气物理研究所,北京,100029
2. 中国科学院植物研究所,北京,100093
基金项目:国家自然科学基金资助项目( Project Supported by the National Natural Science Foundation of China ):49675270;49790020
摘    要:重点介绍采用静态箱 -气相色谱法测定低交换速率的半干旱草原地 -气间温室气体交换速率的采样分析系统的配置及操作 .将静态采样箱置于采样点 ,用 50 cm3或 100 cm3的塑料注射器现场取样 ,转存于气袋中并送到实验室分析 .用改进了的进样系统并装有 FID和 ECD的气相色谱仪 ( GC)分析其中的 CH4、CO2 和 N2O浓度 ,计算出地 -气痕量温室气体的交换速率 .对内蒙古羊草草原、草甸草原 N2O、CO2 和 CH4交换速率日变化规律实测结果分析表明 ,该方法简便易行、准确可靠 .

关 键 词:半干旱草原  静态采样箱  CH4  CO2  N2O  GC  交换速率
收稿时间:1999-07-06

Measurement of the Exchange Rate of Greenhouse Gases between Field and Atmosphere in Semi Arid Grassland
Wang Yuesi,Ji Baoming,Wang Yanfen,Zhang Wen,Liu Guangren,Du Rui and Luo Dongmei. Measurement of the Exchange Rate of Greenhouse Gases between Field and Atmosphere in Semi Arid Grassland[J]. Chinese Journal of Environmental Science, 2000, 21(3): 6-6-10
Authors:Wang Yuesi  Ji Baoming  Wang Yanfen  Zhang Wen  Liu Guangren  Du Rui  Luo Dongmei
Abstract:The method composed of static chamber and GC was used to measure the exchange rates of trace greenhouse gases between field and atmosphere in temperate semi arid grassland.This paper mainly introduced the configuration and operation of the sampling and analysing systems.Plastic syringes(50cm3 or 100cm3 volume)were used to pump gas samples from the closed chambers which were in situ.Gas samples were saved in syringes or gas sampling bags,and then were transported to the center lab.GC/FID & GC/ECD with the modified system of the samples injection were used to analyses the concentration of CH4,CO2 and N2O in the gas samples.The exchange rates of those trace greenhouse gases between field and atmosphere were calculated at last.The results based on the in situ measurement of the diurnal variation of the exchange rates of the N2O,CO2 and CH4 from Aneurolepidium Chinese grassland and meadow steppe in the Inner Mongolia showed that this method was convenient and reliable.
Keywords:semi arid grassland  closed chember  CH4  CO2  N2O  GC  exchange rate.
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