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| 瓦里关山大气CH4本底变化 | |
| 引用本文： | 周凌晞,李金龙,汤洁,温玉璞,张晓春.瓦里关山大气CH4本底变化[J].环境科学学报,2004,24(1):91-95. |
| 作者姓名： | 周凌晞 李金龙 汤洁 温玉璞 张晓春 |
| 作者单位： | 1. 中国气象科学研究院,北京100081;日本国立环境研究所,筑波 2. 北京大学环境学院 3. 中国气象科学研究院,北京100081 4. 北京大学物理学院;青海省气象局,西宁,810001 |
| 基金项目： | 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) |
| 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 ,还可进一步揭示中国内陆高原大气CH4本底特征的成因 |
| 关 键 词： | 大气CH4 本底变化 源汇 地域特征 |
| 文章编号： | 0253-2468(2004)01-0091-05 |
| 收稿时间： | 2002/12/25 0:00:00 |
| 修稿时间： | 2002年12月25 |
Variations of background atmospheric methane at Mt.Waliguan, China |
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| ZHOU Lingxi,LI Jinlong,TANG Jie,WEN Yupu and ZHANG Xiaochun.Variations of background atmospheric methane at Mt.Waliguan, China[J].Acta Scientiae Circumstantiae,2004,24(1):91-95. | |
| Authors: | ZHOU Lingxi LI Jinlong TANG Jie WEN Yupu and ZHANG Xiaochun |
| Institution: | 1. Chinese Academy of Meteorological Sciences, Beijing 100081; 2. National Institute for Environmental Studies, Tsukuba, Ibaraki 3050053, Japan,College of Environmental Sciences, Peking University, Beijing 100871,Chinese Academy of Meteorological Sciences, Beijing 100081,Chinese Academy of Meteorological Sciences, Beijing 100081 and 1. College of Physics, Peking University; 2. Qinghai Meteorological Bureau, Xining 810001 |
| Abstract: | By using observational data during the period of May 1991-May 2002 at Waliguan Observatory(36°17'N, 100°54'E, 3816m asl), characteristics of background atmospheric CH4 as well as potential relationship between sources and sinks, were studied.Results indicated that, the CH4 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 CH4 and amplitude has a notable discrepancy according to the station's geographical location.The fluctuation of CH4 annual growth values did not reach the global means.The unique CH4 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 CH4 obtained at Waliguan represents the Asian continental behavior with global representativeness.It can further explain the formation of background CH4 characteristics in the inland plateau of China by combining with other relevant information. |
| Keywords: | atmospheric CH-4 background variation source and sink regional features |
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