摘要
2009年10月31日—11月8日,用国际上应用较多的4种气溶胶在线监测仪同步监测了深圳大气细粒子中元素碳(EC)和有机物(OM)的浓度。比对结果显示:黑碳仪与单颗粒黑碳光度计测定EC有很高的相关度,R2=0.97,斜率为1.00;在线EC/OC分析仪的EC监测结果与前两者的相关度R2均大于0.95,但是其浓度水平总体偏低30%～40%;在线EC/OC分析仪测定的OC与气溶胶质谱仪测得的OM也比较吻合,相关度R2=0.83,但是在OM高浓度时在线EC/OC分析仪的测量结果相对偏低。对造成不同在线仪器观测数据差异的因素进行了初步探讨,为研究者掌握这些在线仪器获得的高时间分辨率观测数据的准确性和差异性提供支撑信息。
A couple of carbonaceous aerosol online monitoring instruments, which are popularly used in the world, were compared by real atmospheric measurement, in order to provide some useful information on their cbaracteristics to scientists in the field. Elemental carbon （EC） and organic matter （OM） in atmospheric fine particles in Shenzhen were monitored simultaneously by 4 different online instruments from October 31 to November 8, 2009, and the comparison among the results indicated that the EC concentrations measured using an aethalometer and an single particle soot photometer （SP2） agreed with each other quite well, with R^2 = 0. 97 and slope = 1.00 ; the EC concentrations measured using an online EC/ OC analyzer also correlated well （R^2 〉 0.95 ） with those by the aethalometer and SP2, but presented 30%-40% lower concentration levels; the organic carbon （OC） concentrations measured using the online EC/OC analyzer correlated well （R^2 = 0.83） with the OM concentrations measured using an Aerosol Mass Spectrometer （AMS） , but deviated from the OM time-series trends relatively more when the OM were at high concentration levels. Possible reasons for the differences among the measurement results are discussed.
出处
《北京大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第1期159-165,共7页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家自然科学基金(20777001,40805049)
深圳市科技计划项目(CXB200903090046A)资助
关键词
有机物
元素碳
在线监测
比对
organic matter
elemental carbon
online monitoring
comparison
