Characteristics of atmospheric CO2 and CH4 at the Shangdianzi regional background station in China
Characteristics of atmospheric CO2 and CH4 at the Shangdianzi regional background station in China
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中国上甸子区域本底站大气CO2和CH4特征
DOI：
10.1016/j.atmosenv.2016.01.044
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发表时间：
2016-04-01
影响因子：
5
通讯作者：
Luan, Tian
中科院分区：
文献类型：
--
作者：
Fang, Shuang-xi;Tans, Pieter P.;Luan, Tian
2009 - 2013年在中国上甸子区域本底站（SDZ）连续观测了大气CO2和CH 4。根据局地地面风场和长距离输送的影响，将观测记录分为局地影响、京津冀影响和俄蒙蒙内蒙古影响。81.4%的CO2和75.6%的CH 4具有代表性，表明SDZ大气CO2和CH 4受当地源和汇的影响很大。后向轨迹的聚类分析表明，大气CO2和CH 4受西北气团（RMI）或南、东南气团（BTH）的影响。BTH中的CO2和CH 4摩尔分数始终高于RMI，7月份CO2的最大差异为11.5 +/- 0.3 ppm，CH 4的最大差异为102 +/- 1 ppb。BTH的CO_2和CH_4年增长率分别为3.8 +/-0.01ppm/yr（-1）和10 +/-0.1ppb/yr（-1），明显高于RMI和全球平均值。BTH的CO2和CH 4的长期变化趋势与RMI不同，CO2和CH 4的变化趋势分别接近1.0 ppm yr（-1）和2 ppb yr（-1），表明京津冀平原CO2和CH 4的排放强度每年增加20%以上。(C)2016爱思唯尔有限公司版权所有。
Atmospheric CO2 and CH4 have been continuously measured at the Shangdianzi regional background station (SDZ) in China from 2009 to 2013. Based on the influences of local surface wind and long-distance transport, the observed records were flagged into locally influenced, Beijing-Tianjin-Hebei (BTH) influenced, and Russia, Mongolia, and Inner Mongolia autonomous region influenced (RMI). similar to 81.4% of CO2 and similar to 75.6% of CH4 mole fractions were flagged as locally representative, indicating that the atmospheric CO2 and CH4 at SDZ were strongly influenced by local sources and sinks. Cluster analysis of back trajectories proved that the atmospheric CO2 and CH4 were influenced by air masses from northwest (RMI) or from south and southeast (BTH). The CO2 and CH4 mole fractions in BTH are always higher than in RMI, with the largest difference of 11.5 +/- 0.3 ppm for CO2 and 102 +/- 1 ppb for CH4 in July. The annual growth rates of CO2 and CH4 in BTH are 3.8 +/- 0.01 ppm yr(-1) and 10 +/- 0.1 ppb yr(-1), respectively, which are apparently higher than those of the RMI and the global means. The long-term trends of CO2 and CH4 in BTH are deviating from those in RMI, with ratios of similar to 1.0 ppm yr(-1) for CO2 and similar to 2 ppb yr(-1) for CH4, indicating the strengths of CO2 and CH4 emission in Beijing-Tianjin-Hebei plain increased more than 20% every year. (C) 2016 Elsevier Ltd. All rights reserved.