Effects of aging on organic aerosol from open biomass burning smoke in aircraft and laboratory studies

被引：479

作者：

Cubison, M. J. ^{[1
,2
]}

Ortega, A. M. ^{[1
,3
]}

Hayes, P. L. ^{[1
,2
]}

Farmer, D. K. ^{[1
,2
]}

Day, D. ^{[1
,2
]}

Lechner, M. J. ^{[1
]}

Brune, W. H. ^{[4
]}

Apel, E. ^{[5
]}

Diskin, G. S. ^{[6
]}

Fisher, J. A. ^{[7
]}

Fuelberg, H. E. ^{[8
]}

Hecobian, A. ^{[9
]}

Knapp, D. J. ^{[5
]}

Mikoviny, T. ^{[10
]}

Riemer, D. ^{[11
]}

Sachse, G. W. ^{[12
]}

Sessions, W. ^{[8
]}

Weber, R. J. ^{[9
]}

Weinheimer, A. J. ^{[5
]}

Wisthaler, A. ^{[10
]}

Jimenez, J. L. ^{[1
,2
]}

机构：

[1] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA

[2] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA

[3] Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA

[4] Penn State Univ, Dept Meteorol, University Pk, PA 16802 USA

[5] Natl Ctr Atmospher Res, Boulder, CO 80307 USA

[6] NASA, Langley Res Ctr, Hampton, VA 23665 USA

[7] Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA

[8] Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA

[9] Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA

[10] Univ Innsbruck, Inst Ionenphys & Angew Phys, A-6020 Innsbruck, Austria

[11] Univ Miami, Rosenstiel Sch Marine & Atmospher Chem, Miami, FL 33149 USA

[12] Natl Inst Aerosp, Hampton, VA USA

来源：

ATMOSPHERIC CHEMISTRY AND PHYSICS | 2011年 / 11卷 / 23期

关键词：

URBAN SUPERSITE T0; HIGH-RESOLUTION; MASS-SPECTROMETRY; HETEROGENEOUS OXIDATION; MEXICO-CITY; PHOTOCHEMICAL OXIDATION; VOLATILITY MEASUREMENTS; SOURCE APPORTIONMENT; PARTICULATE MATTER; AMBIENT AEROSOL;

D O I：

10.5194/acp-11-12049-2011

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Biomass burning (BB) is a large source of primary and secondary organic aerosols (POA and SOA). This study addresses the physical and chemical evolution of BB organic aerosols. Firstly, the evolution and lifetime of BB POA and SOA signatures observed with the Aerodyne Aerosol Mass Spectrometer are investigated, focusing on measurements at high-latitudes acquired during the 2008 NASA ARCTAS mission, in comparison to data from other field studies and from laboratory aging experiments. The parameter f(60), the ratio of the integrated signal at m/z 60 to the total signal in the organic component mass spectrum, is used as a marker to study the rate of oxidation and fate of the BB POA. A background level of f(60) similar to 0.3% +/- 0.06% for SOA-dominated ambient OA is shown to be an appropriate background level for this tracer. Using also f(44) as a tracer for SOA and aged POA and a surrogate of organic O:C, a novel graphical method is presented to characterise the aging of BB plumes. Similar trends of decreasing f(60) and increasing f(44) with aging are observed in most field and lab studies. At least some very aged BB plumes retain a clear f(60) signature. A statistically significant difference in f(60) between highly-oxygenated OA of BB and non-BB origin is observed using this tracer, consistent with a substantial contribution of BBOA to the springtime Arctic aerosol burden in 2008. Secondly, a summary is presented of results on the net enhancement of OA with aging of BB plumes, which shows large variability. The estimates of net OA gain range from Delta OA/Delta CO(mass) = -0.01 to similar to 0.05, with a mean Delta OA/POA similar to 19%. With these ratios and global inventories of BB CO and POA a global net OA source due to aging of BB plumes of similar to 8 +/- 7 TgOA yr(-1) is estimated, of the order of 5% of recent total OA source estimates. Further field data following BB plume advection should be a focus of future research in order to better constrain this potentially important contribution to the OA burden.

引用

页码：12049 / 12064

页数：16

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