Secondary organic aerosol formation from anthropogenic air pollution

rapid and higher than expected

Rainer Volkamer (Avtor), Jose L. Jimenez (Avtor), F. M. San Martini (Avtor), Katja Džepina (Avtor), Qi Zhang (Avtor), Dara Salcedo (Avtor), Luisa T. Molina (Avtor), D. Worsnop (Avtor)

Povzetek

The atmospheric chemistry of volatile organic compounds (VOCs) in urban areas results in the formation of 'photochemical smog', including secondary organic aerosol (SOA). State-of-the-art SOA models parameterize the results of simulation chamber experiments that bracket the conditions found in the polluted urban atmosphere. Here we show that in the real urban atmosphere reactive anthropogenic VOCs (AVOCs) produce much larger amounts of SOA than these models predict, even shortly after sunrise. Contrary to current belief, a significant fraction of the excess SOA is formed from first-generation AVOC oxidation products. Global models deem AVOCs a very minor contributor to SOA compared to biogenic VOCs (BVOCs). If our results are extrapolated to other urban areas, AVOCs could be responsible for additional 3 - 25 Tg yr(-1) SOA production globally, and cause up to - 0.1 W m(-2) additional top-of-the-atmosphere radiative cooling.

Ključne besede

atmospheric aerosol;atmospheric chemistry;volatile organic compounds;secondary organic aerosols;

Podatki

Jezik:	Angleški jezik
Leto izida:	2006
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UNG - Univerza v Novi Gorici
UDK:	54
COBISS:	59094787
ISSN:	0094-8276
Št. ogledov:	1783
Št. prenosov:	0
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

URN:	URN:SI:UNG
Strani:	str. 1-4
Letnik:	ǂVol. ǂ33
Zvezek:	ǂiss. ǂ17
Čas izdaje:	2006
DOI:	10.1029/2006GL026899
ID:	12761645