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)

vincent.michoud@mines-douai.fr

2+ H2SO4 (A. Kukui), mono and multifunctionnal OVOCs (LISA), SVOC (INERIS, LISA), PAN (LISA)

Instrument Time resolution

# species # species > LD*

PTR-ToFMS 10 min 16 16

Online GC/FID/FID

90 min 43 NMHC (C2-C12)

26

Online GC/FID/MS

90 min 239 NMHC (C5-C10)14 OVOC (C2-C10)

23

Offline active sampling solid adsorbants

180 min 40(C6-C16)

28

Offline active sampling

DNPH

180 min 18(C1-C9)

14

0

1 0 0

2 0 0

3 0 0

4 0 0

5 0 0

6 0 0

7 0 0

8 0 0

9 0 0

1 0 0 0

1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 0 1 0 2 0 3 0 4 0 5 0 6

0 .0 E + 0 0

5 .0 E + 0 6

1 .0 E + 0 7

1 .5 E + 0 7

2 .0 E + 0 7

2 .5 E + 0 7

3 .0 E + 0 7

3 .5 E + 0 7

4 .0 E + 0 7

Date (July and Aug of 2013)

Dia

met

er, n

m

SMPS data (CNRM)

H2SO4 cm-3

ND<20nm cm-3

H2SO4

SO42- (AMS)

H2SO4 and aerosol measurements:

- any indication for new particle formation / growth ?

Courtesy to A. Kukui

Courtesy to A. Kukui

Role of Biogenics and Oxidation Products?Intense nucleation events

Role of Anthropized air masses?NENW 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?y = 0.3122x - 3.9992

R² = 0.5701

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

0.00000 10.00000 20.00000 30.00000 40.00000

Org

anic

s (A

MS)

VOCs (PTRMS)

Org vs VOCs

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

4.00

4.50

5.00

0.0 0.2 0.4 0.6 0.8 1.0

sulfa

te (A

MS)

DMS (PTRMS)

sulfate vs DMSy = 0.04x + 0.18R² = 0.31

y = 0.26xR² = 0.87

Very low level of DMS at Cape Corsica with suspicions of interferences from acetaldehyde cluster.

Courtesy to J. Pey

0E+00

1E-04

2E-04

3E-04

4E-04

0 100 200 300 400 500 600

D, nm

CS

(D),

s-1

02/08 18:00

27/07 12:00

H2SO4=k×OH×SO2 / CS

0E+00

1E-02

2E-02

3E-02

18/7

19/7

20/7

21/7

22/7

23/7

24/7

25/7

26/7

27/7

28/7

29/7

30/7

31/7

01/8

02/8

03/8

04/8

05/8

06/8

CS

, s-1

; S

urf

, 10

-4cm

2 /cm

3

0

5

10

15

20

25

30

35

21 22 23 24 25 26 27 28 29 30 31 01 02 03 04 05 06

OH

, H2S

O4, 1

06 c

m-3

0

1

2

3

SO

2, p

pb

H2SO4

OH

SO2

CS: H2SO4 Condensation sink (SMPS, LaMP)

GF=1.5 (<110 nm, LaMP)

~30% overestimation of H2SO4

No additional source of H2SO4 !!!