我国近地面甲烷浓度分布及变化规律
The Distribution and Variation Trend of Near Surface Methane Concentration in China
史晓宁1
作者信息
- 1. 南京市第二十九中学,江苏南京210036
- 折叠
摘要
利用我国业务使用的5个大气本底监测站的观测资料,分析了2009年1月至2013年12月不同地区近地面甲烷(CH4)浓度的分布和变化规律.结果表明:这5年临安站CH4浓度最高,其次是龙凤山站,上甸子站居中,而香格里拉站和瓦里关站CH4浓度最低.上甸子站和龙凤山站CH4浓度具有明显的双峰特征,最高值出现在夏季,次高值出现在冬季;且受人为活动的影响,CH4浓度日变化幅度很大.而香格里拉站和瓦里关站由于海拔高,人为排放源少,只有1个峰值出现在自然源排放强烈的夏季.除上甸子站CH4浓度呈逐年略下降趋势外,其余4个站的CH4浓度都呈逐渐上升趋势.
Abstract
The distribution and change trend of near surface methane concentration was analyzed using methane observations from Chinese five operational atmospheric background stations from Jan.2009 to Dec.2013.The results showed that the methane concentration of Lin'an station was the highest,Longfengshan station was second high,Shangdianzi station lied middle level,while the concentrations in Shangri-La and Waliguan station were relatively low in these five years.The methane concentration in Shangdianzi and Longfengshan station were having double peak characters with highest values in summer and the second highest in winter.At the same time the diurnal change in these two stations were also higher as a result of human activity.While,only one peak existed in Waliguan and Shangri-La station with the highest values in summer because of the high altitude and minimal anthropogenic emissions.Besides the methane concentration in Shangdianzi station showed slightly downward trend,the methane in other four stations all presented the increasing trend with time.
关键词
大气本底站/甲烷/分布和变化Key words
Atmospheric background station/Methane/Distribution and variation引用本文复制引用
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据