摘要
利用 1991 0 5— 2 0 0 2 0 5期间实测资料 ,分析了瓦里关全球基准站 (36°17′N ,10 0°5 4′E ,海拔 3816m)大气CH4本底特征 ,并探讨了与源汇过程的关系 .结果表明 ,瓦里关山大气CH4体积分数本底范围和增长趋势与 6 0°N— 30°N平均水平大致相符 ,但本底体积分数季节变化与所处纬度带基本特征和季节振幅的地理分布差异较大 ,年增长值波动也与全球平均状况并不完全一致 ,是所在地区多种CH4源汇和大气输送共同作用的结果 .瓦里关站提供的大气CH4本底观测资料 ,既能体现亚洲内陆地域特点又具有全球代表性 ,辅以其它相关资料 。
By using observational data during the period of May 1991—May 2002 at Waliguan Observatory(36°17′N,100°54′E,3816?m asl),characteristics of background atmospheric CH-4 as well as potential relationship between sources and sinks,were studied.Results indicated that,the CH-4 concentration distribution and the growth trend coincided with the results of other monitoring records in the similar latitudinal band 60°N—30°N.However,the averaged seasonal variation pattem of CH-4 and amplitude has a notable discrepancy according to the station's geographical location.The fluctuation of CH-4 annual growth values did not reach the global means.The unique CH-4 characteristics at Waliguan are probably attributed to the joint influence of multiple sources,sinks,as well as air mass transport from the surrounding areas.The observational data of CH-4 obtained at Waliguan represents the Asian continental behavior with global representativeness.It can further explain the formation of background CH-4 characteristics in the inland plateau of China by combining with other relevant information.
出处
《环境科学学报》
CAS
CSCD
北大核心
2004年第1期91-95,共5页
Acta Scientiae Circumstantiae
基金
联合国全球环境基金 (GLO 91 G32 )
日本文部科学省学术振兴会JSPS博士后研究基金 (PB0 1736 )
中华人民共和国国家科技部基础性工作项目 (G99 A 0 7)
关键词
大气监测
甲烷
本底变化
源汇
地域特征
atmospheric CH-4
background variation
source and sink
regional features
