Rethinking organic aerosols: Semivolatile emissions and photochemical aging

被引：1469

作者：

Robinson, Allen L. ^{[1
]}

Donahue, Neil M.

Shrivastava, Manish K.

Weitkamp, Emily A.

Sage, Amy M.

Grieshop, Andrew P.

Lane, Timothy E.

Pierce, Jeffrey R.

Pandis, Spyros N.

机构：

[1] Carnegie Mellon Univ, Ctr Atmospher Particle Studies, Pittsburgh, PA 15213 USA

[2] Univ Patras, Dept Chem Engn, Patras 26500, Greece

来源：

SCIENCE | 2007年 / 315卷 / 5816期

关键词：

D O I：

10.1126/science.1133061

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Most primary organic-particulate emissions are semivolatile; thus, they partially evaporate with atmospheric dilution, creating substantial amounts of low-volatility gas-phase material. Laboratory experiments show that photo-oxidation of diesel emissions rapidly generates organic aerosol, greatly exceeding the contribution from known secondary organic-aerosol precursors. We attribute this unexplained secondary organic-aerosol production to the oxidation of low-volatility gas-phase species. Accounting for partitioning and photochemical processing of primary emissions creates a more regionally distributed aerosol and brings model predictions into better agreement with observations. Controlling organic particulate-matter concentrations will require substantial changes in the approaches that are currently used to measure and regulate emissions.

引用

页码：1259 / 1262

页数：4

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