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 transcript:

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 + 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

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

Role of Biogenics and Oxidation Products? Intense nucleation events

Role of Anthropized air masses? NE NW Wind sectors

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)

Thank You

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

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 !!!