中国部分清洁地区大气中N_2O的浓度  

THE BACKGROUND LEVELS OF ATMO SPHERIC NITROUS OXIDE(N 2O) IN SOME REGIONS OF CHINA

作　　者：王木林[1] 程红兵[1] 李兴生[1] 温玉璞[1] 

机构地区：[1]中国气象科学研究院

出　　处：《气象学报》1997年第3期363-370,共8页Acta Meteorologica Sinica

基　　金：国家科技攻关项目;国家重大自然科学基金

摘　　要：１９９３年４月—１９９５年８月对中国部分清洁地区大气的Ｎ２Ｏ浓度进行了现场观测，结果表明：农田（玉米田和麦田）大气的Ｎ２Ｏ平均浓度高达３２２．１－３４３．４ｐｐｂｖ，这是土壤排放Ｎ２Ｏ的结果；临安、龙风山和瓦里关山大气本底观测站（ＷＭＯ／ＧＡＷ）Ｎ２Ｏ的平均浓度分别为３１８．８±８．４ｐｐｂｖ，３１７．４±４．７ｐｐｂｖ和３１４．０±４．２ｐｐｂｖ。在此基础上，分析了大气Ｎ２Ｏ的分布及变化特征。另外。In the obverservational result of the atmospheric N 2O concentration in some unpolluted regions of China from May 1993 to July 1995, They show that the average mixing ratios of N 2O over agricultural fieldes(maize and wheat ) are from 322.1 to 343.4 ppbv ( 10-9 v/v). There are larger value and variation of mixing ratio of N 2O due to emission of N 2O from fertilized soils. The mean mixing ratios of N 2O at Linan and Longfengshan Background Air Pollution Monitoring Station and Waliguanshan Global Atmosphere Watch Baseline Observatory (WMO/GAW )are 318.8±8.4 ppbv, 317.4±4.7 ppbv and 314.0±4.2 ppbv, respectively.The distribution and variation of N 2O were disscussed. Additionally,the sampling technique and measured method of mixing ratio of N 2O were specially analysed and assessed.

关 键 词：大气 清洁地区 氧化亚氮 浓度 气相色谱法 

分 类 号：P421.2[天文地球—大气科学及气象学]