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000004695 084__ $$2WoS$$aMeteorology & Atmospheric Sciences
000004695 1001_ $$0P:(DE-HGF)0$$aSaathoff, H.$$b0
000004695 245__ $$aTemperature dependence of yields of secondary organic aerosols from the ozonolysis of a-pinene and limonene
000004695 260__ $$aKatlenburg-Lindau$$bEGU$$c2009
000004695 300__ $$a1551 - 1577
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000004695 440_0 $$09601$$aAtmospheric Chemistry and Physics$$v9$$x1680-7316
000004695 500__ $$aThis work was supported by the ESF programme INTROP, Interdisciplinary Tropospheric Research: from the Laboratory to Global Change and the European Network of Excellence ACCENT. We thank the AIDA team of Research Centre Karlsruhe for the effective support during the measurement campaigns. MH and AMJ acknowledge support by the Swedish Foundation for Strategic Environmental Research MISTRA and Formas under contract 214-2006-1204.
000004695 520__ $$aSecondary organic aerosol (SOA) formation has been investigated as a function of temperature and humidity for the ozone-initiated reaction of the two monoterpenes alpha-pinene (243-313 K) and limonene (253-313 K) using the 84.5 m(3) aerosol chamber AIDA. This paper gives an overview of the measurements done and presents parameters specifically useful for aerosol yield calculations. The ozonolysis reaction, selected oxidation products and subsequent aerosol formation were followed using several analytical techniques for both gas and condensed phase characterisation. The effective densities of the SOA were determined by comparing mass and volume size distributions to (1.25 +/- 0.10) g cm(-3) for alpha-pinene and (1.3 +/- 0.2) g cm(-3) for limonene. The detailed aerosol dynamics code COSIMA-SOA proved to be essential for a comprehensive evaluation of the experimental results and for providing parameterisations directly applicable within atmospheric models. The COSIMA-assisted analysis succeeded to reproduce the observed time evolutions of SOA total mass, number and size distributions by adjusting the following properties of two oxidation product proxies: individual yield parameters (alpha(i)), partitioning coefficients (K-i), vapour pressures (p(i)) and effective accommodation coefficients (gamma(i)). For these properties temperature dependences were derived and parameterised. Vapour pressures and partitioning coefficients followed classical Clausius-Clapeyron temperature dependences. From this relationship enthalpies of vaporisation were derived for the two more and less volatile product proxies of alpha-pinene: (59 +/- 8) kJ mol(-1) and (24 +/- 9) kJ mol(-1), and limonene: (55 +/- 14) kJ mol(-1) and (25 +/- 12) kJ mol(-1). The more volatile proxy components had a notably low enthalpy of vaporisation while the less volatile proxy components gave enthalpies of vaporisation comparable with those of typical products from alpha-pinene oxidation, e. g. pinonaldehyde and pinonic acid.
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000004695 7001_ $$0P:(DE-HGF)0$$aNaumann, K.-H.$$b1
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000004695 7001_ $$0P:(DE-Juel1)VDB72913$$aJonsson, A.M.$$b3$$uFZJ
000004695 7001_ $$0P:(DE-HGF)0$$aHallquist, M.$$b4
000004695 7001_ $$0P:(DE-Juel1)4528$$aKiendler-Scharr, A.$$b5$$uFZJ
000004695 7001_ $$0P:(DE-Juel1)16346$$aMentel, T. F.$$b6$$uFZJ
000004695 7001_ $$0P:(DE-Juel1)5344$$aTillmann, R.$$b7$$uFZJ
000004695 7001_ $$0P:(DE-HGF)0$$aSchurath, U.$$b8
000004695 773__ $$0PERI:(DE-600)2069847-1$$gVol. 9, p. 1551 - 1577$$p1551 - 1577$$q9<1551 - 1577$$tAtmospheric chemistry and physics$$v9$$x1680-7316$$y2009
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