Cloud droplet activation of polymerized organic aerosol

被引：40

作者：

Petters, Markus D. ^{[1
]}

Kreidenweis, Sonia M.

Snider, Jefferson R.

Koehler, Kirsten A.

Wang, Qiang

Prenni, Anthony J.

Demott, Paul J.

机构：

[1] Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA

[2] Univ Wyoming, Dept Atmospher Sci, Laramie, WY 82071 USA

[3] Colorado State Univ, Dept Chem Engn, Ft Collins, CO 80523 USA

来源：

TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY | 2006年 / 58卷 / 03期

关键词：

D O I：

10.1111/j.1600-0889.2006.00181.x

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

High-molecular-weight organic compounds represent an important fraction in atmospheric aerosols, but their interactions with atmospheric water vapour are not well understood. Specifically, the hygroscopicity of polymerized atmospheric aerosols is larger than expected for their high molecular weights and is not a strong function of the degree of polymerization, but their cloud-nucleating activity declines as polymerization progresses. We apply a Flory-Huggins based theory for polymer-water interactions to describe water activity in aqueous solutions of atmospherically relevant oligomers and polymers, and show via experiments on particles composed of commercial polymers that it is consistent with observed particle hygroscopic growth and cloud formation behaviour.

引用

页码：196 / 205

页数：10

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