Evolution of organic aerosols in the atmosphere

Jose L. Jimenez (Avtor), M. R. Canagaratna (Avtor), N. M. Donahue (Avtor), A. S. H. Prevot (Avtor), Qi Zhang (Avtor), J. H. Kroll (Avtor), P. F. DeCarlo (Avtor), J. David Allan (Avtor), H. Coe (Avtor), Katja Džepina (Avtor)

Povzetek

Organic aerosol (OA) particles affect climate forcing and human health, but their sources and evolution remain poorly characterized. We present a unifying model framework describing the atmospheric evolution of OA that is constrained by high–time-resolution measurements of its composition, volatility, and oxidation state. OA and OA precursor gases evolve by becoming increasingly oxidized, less volatile, and more hygroscopic, leading to the formation of oxygenated organic aerosol (OOA), with concentrations comparable to those of sulfate aerosol throughout the Northern Hemisphere. Our model framework captures the dynamic aging behavior observed in both the atmosphere and laboratory: It can serve as a basis for improving parameterizations in regional and global models.

Ključne besede

secondary organic aerosol;source apportionment;aerodyne aerosol mass spectrometer;global field measurements;laboratory experiments;

Podatki

Jezik:	Angleški jezik
Leto izida:	2009
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UNG - Univerza v Novi Gorici
UDK:	54
COBISS:	59051267
ISSN:	0036-8075
Št. ogledov:	1428
Št. prenosov:	0
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

URN:	URN:SI:UNG
Strani:	str. 1525-1529
Letnik:	ǂVol. ǂ326
Zvezek:	ǂiss. ǂ5959
Čas izdaje:	2009
DOI:	10.1126/science.1180353
ID:	12757740