Temporal variations of elemental carbon in Beijing
Temporal variations of elemental carbon in Beijing
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DOI：
10.1029/2009jd012027
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发表时间：
2009-12-08
影响因子：
4.4
通讯作者：
Wu, Y.
中科院分区：
文献类型：
--
作者：
Han, S.;Kondo, Y.;Wu, Y.
测定了2005 ~ 2006年北京市大气中元素碳（EC）、一氧化碳（CO）和二氧化碳（CO2）的浓度。用半连续热光学分析仪每小时测量一次EC。在距观测点约50公里的范围内，观测到的浓度相当均匀。EC和CO的年平均浓度分别为6.9 mu gC m（-3）和1120 ppm /十亿（体积）。随着近地面风速（WS）的减小，这些树种的浓度增加。CO- co2、EC- co2和EC-CO相关性的斜率用于估计主要EC和CO源。在弱风区(WS
Concentrations of elemental carbon (EC), carbon monoxide (CO), and carbon dioxide (CO2) were measured in Beijing between 2005 and 2006. EC was measured every hour with a semicontinuous thermal optical analyzer. The observed concentrations were rather uniform over a distance of about 50 km from the observation site. The annual average concentrations of EC and CO were 6.9 mu gC m(-3) and 1120 parts per billion by volume, respectively. The concentrations of these species increased with decreasing near-surface wind speed (WS). The slopes of the CO-CO2, EC-CO2, and EC-CO correlations are used to estimate major EC and CO sources. In the weak wind regime (WS