Simulation chamber studies on the NO3 chemistry of atmospheric aldehydes

被引：20

作者：

Bossmeyer, J. ^{[1
]}

Brauers, T. ^{[1
]}

Richter, C. ^{[1
]}

Rohrer, F. ^{[1
]}

Wegener, R. ^{[1
]}

Wahner, A. ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Chem & Dynam Geosphare Troposphare 2, D-52425 Julich, Germany

来源：

GEOPHYSICAL RESEARCH LETTERS | 2006年 / 33卷 / 18期

关键词：

D O I：

10.1029/2006GL026778

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Absolute reaction rate studies of NO3 radicals with 4 aldehydes were performed in the atmosphere simulation chamber SAPHIR at the Research Center Julich. Rate coefficients ( ethanal: 2.6 +/- 0.5, propanal: 5.8 +/- 1.0, butanal: 11.9 +/- 1.4, benzaldehyde: 2.2 +/- 0.6; in 10(-15) cm(3) s(-1) at 300 K) were determined from measured concentration time profiles of aldehydes and NO3 at near ambient conditions. The values for the aliphatic aldehydes are in good agreement with the most recent recommendations ( IUPAC Subcommittee on Gas Kinetic Data Evaluation for Atmospheric Chemistry: Evaluated kinetic and photochemical data for atmospheric chemistry, 2005, available at http:// www. iupac- kinetic. ch. cam. ac. uk). The measured concentration- time profiles of precursor aldehydes, NO3, NO2, and of product aldehydes were compared to model calculations based on the MCM v3 ( Jenkin et al., 2003; Saunders et al., 2003). Differences between measurements and model are attributed to a major interference of the GC system to peroxyacyl nitrates. In addition modifications to the rate constants in the MCM are suggested.

引用

页数：5

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