江西鹰潭地区森林生态系统NO_2浓度变化规律  

Dynamics of atmospheric NO_2 concentration in a forest eco-system at Yingtan, Jiangxi Province

作　　者：樊建凌[1] 胡正义[1] 

机构地区：[1]中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室

出　　处：《中国环境科学》2006年第2期171-175,共5页China Environmental Science

基　　金：国家"973"项目(G1999011805);中国科学院知识创新项目(ISSASIP0205);土壤与农业可持续发展国家重点实验室基金资助

摘　　要：利用中国科学院红壤生态试验站（江西鹰潭）森林微气象分站二氧化氨（NO2）定位连续观测数据，分析了2003年8月-2004年7月江西鹰潭森林大气NO2浓度的分布特征和动态变化．结果表明。该森林生态系统NO2浓度时均值、日均值和月均值分别为12．2，12．2，17．4μgm^3，其中51．7％89日均浓度介于10-15μg／m^3．白天NO2浓度比夜晚低7％，是大峰值浓度在夜晚21：00．秋、冬季NO2浓度高，春、夏季低．大气NO2浓度季节变化表明该地区已受到污染，但污染较轻。NO2满足国家Ⅰ级标准．The distribution pattern and dynamics of atmospheric NO2 concentration in a forest ecosystem at Yingtan city of Jiangxi Province were analyzed with data from a one-year from August 2003 to July 2004） field automatic observation. The hourly, daily and monthly mean concentration of NO2 were 12.2, 12.2 and 17.4μg/m3, respectively. The 51.7% of hourly mean concentration of NO2 ranged from 10μg/m^3 to 15μg/m^3. The mean NO2 concentration was lower by 7% at the daytime than at the night, while the highest NO2 concentration was observed at 21：00. NO2concentrations were higher in the autumn-winter seasons than in the spring-summer seasons. The high concentration of NO2 suggested that the atmosphere was polluted in the study area, however, the present pollution class was still attributed to the national first-grade standard.

关 键 词：森林 二氧化氮 动态 野外定位观测 

分 类 号：X511[环境科学与工程—环境工程]