Chemical, physical, and optical evolution of biomass burning aerosols: a case study

被引：108

作者：

Adler, G. ^{[1
]}

Flores, J. M. ^{[2
,3
]}

Riziq, A. Abo ^{[1
]}

Borrmann, S. ^{[2
,3
]}

Rudich, Y. ^{[1
]}

机构：

[1] Weizmann Inst Sci, Dept Environm Sci, IL-76100 Rehovot, Israel

[2] Max Planck Inst Chem, Dept Particle Chem, D-55128 Mainz, Germany

[3] Johannes Gutenberg Univ Mainz, Inst Atmospher Phys, D-55099 Mainz, Germany

来源：

ATMOSPHERIC CHEMISTRY AND PHYSICS | 2011年 / 11卷 / 04期

基金：

以色列科学基金会;

关键词：

POLYCYCLIC AROMATIC-HYDROCARBONS; OXYGENATED ORGANIC AEROSOLS; MASS-SPECTROMETER; REFRACTIVE-INDEX; HIGH-RESOLUTION; PARTICULATE MATTER; SMOKE PARTICLES; AIR-POLLUTION; URBAN; EMISSIONS;

D O I：

10.5194/acp-11-1491-2011

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In-situ chemical composition measurements of ambient aerosols have been used for characterizing the evolution of submicron aerosols from a large anthropogenic biomass burning (BB) event in Israel. A high resolution Time of Flight Aerosol Mass Spectrometer (HR-RES-TOF-AMS) was used to follow the chemical evolution of BB aerosols during a night-long, extensive nationwide wood burning event and during the following day. While these types of extensive BB events are not common in this region, burning of agricultural waste is a common practice. The aging process of the BB aerosols was followed through their chemical, physical and optical properties. Mass spectrometric analysis of the aerosol organic component showed that aerosol aging is characterized by shifting from less oxidized fresh BB aerosols to more oxidized aerosols. Evidence for aerosol aging during the day following the BB event was indicated by an increase in the organic mass, its oxidation state, the total aerosol concentration, and a shift in the modal particle diameter. The effective broadband refractive index (EBRI) was derived using a white light optical particle counter (WELAS). The average EBRI for a mixed population of aerosols dominated by open fires was m = 1.53(+/- 0.03) + 0.07i(+/- 0.03), during the smoldering phase of the fires we found the EBRI to be m = 1.54(+/- 0.01) + 0.04i(+/- 0.01) compared to m = 1.49(+/- 0.01) + 0.02i(+/- 0.01) of the aged aerosols during the following day. This change indicates a decrease in the overall aerosol absorption and scattering. Elevated levels of particulate Polycyclic Aromatic Hydrocarbons (PAHs) were detected during the entire event, which suggest possible implications for human health during such extensive event.

引用

页码：1491 / 1503

页数：13

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