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Which potential gaseous precursors for nucleation and new particles growth? Mines Douai, LAMP, LCE, LPC2E, LISA, INERIS Mines Douai Département Sciences.

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Presentation on theme: "Which potential gaseous precursors for nucleation and new particles growth? Mines Douai, LAMP, LCE, LPC2E, LISA, INERIS Mines Douai Département Sciences."— Presentation transcript:

1 Which potential gaseous precursors for nucleation and new particles growth? Mines Douai, LAMP, LCE, LPC2E, LISA, INERIS Mines Douai Département Sciences de l’Atmosphère et Génie de l’Environnement (SAGE)

2 2 + H 2 SO 4 (A. Kukui), mono and multifunctionnal OVOCs (LISA), SVOC (INERIS, LISA), PAN (LISA) InstrumentTime resolution # species# species > LD* PTR-ToFMS10 min16 Online GC/FID/FID 90 min43 NMHC (C2-C12) 26 Online GC/FID/MS 90 min23 9 NMHC (C5-C10) 14 OVOC (C2-C10) 23 Offline active sampling solid adsorbants 180 min40 (C6-C16) 28 Offline active sampling DNPH 180 min18 (C1-C9) 14

3 Date (July and Aug of 2013) Diameter, nm SMPS data (CNRM) H 2 SO 4 cm -3 N D<20nm cm -3 H 2 SO 4 SO 4 2- (AMS) H 2 SO 4 and aerosol measurements: - any indication for new particle formation / growth ? Courtesy to A. Kukui

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5 Role of Biogenics and Oxidation Products? Intense nucleation events

6 Role of Anthropized air masses? NE NW Wind sectors

7 Perspectives Harmonization of methods and approachs between Cape Corsica and Mallorca Analysis of joint aerosols and VOCs database (also in the frame of CARBOSOR project) - High time resolved instruments (PTR-MS, AMS) - Evolution of the aerosol state of oxidation (f43/f44) with several gaseous tracers A PMF analyses with combined VOCs and aerosols database ongoing. Highlight species combinaison with a focus on nucleation events? Multifunctional OVOCs and SVOCs measurements may be of prime interest for nucleation (data coming soon)

8 Thank You

9 VOCs Mallorca: DMS roles? Very low level of DMS at Cape Corsica with suspicions of interferences from acetaldehyde cluster. Courtesy to J. Pey

10 H 2 SO 4 =k×OH×SO 2 / CS CS: H 2 SO 4 Condensation sink (SMPS, LaMP) GF=1.5 (<110 nm, LaMP) ~30% overestimation of H 2 SO 4 No additional source of H2SO4 !!!


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