Strong spectral dependence of light absorption by organic carbon particles formed by propane combustion

被引：114

作者：

Schnaiter, M. ^{[1
]}

Gimmler, M.

Llamas, I.

Linke, C.

Jaeger, C.

Mutschke, H.

机构：

[1] Forschungszentrum Karlsruhe, Inst Meteorol & Climate Res, Karlsruhe, Germany

[2] Univ Jena, Inst Astrophys, D-6900 Jena, Germany

[3] Univ Jena, Univ Observ, D-6900 Jena, Germany

来源：

ATMOSPHERIC CHEMISTRY AND PHYSICS | 2006年 / 6卷

关键词：

D O I：

10.5194/acp-6-2981-2006

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

We have measured the extinction and absorption cross sections of carbon particles emitted by a propane diffusion flame both in an aerosol chamber and on size-segregated samples deposited on optical windows. The absorption cross section, the single scattering albedo, and the Angstrom exponent show drastic dependencies both on the C/O ratio and on the particle size. This is interpretated as being due to the appearance of nucleation modes of smaller organic particles at higher C/O ratios, which were detected by SMPS measurements and partially by TEM analysis. The spectral range of the validity of the absorption power-law ( Angstrom exponent) model is investigated by vacuum ultraviolet extinction measurements. These measurements give also indications for a preferentially aromatic nature of the OC component of the flame products.

引用

页码：2981 / 2990

页数：10

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