Marine aerosol measurements - welcome |...

Marine aerosol measurements

AMS Users Meeting 2015

Jurgita Ovadnevaite | 13 September 2015

Darius Ceburnis, Manuel Dall’Osto & Colin O’Dowd,

C-CAPS colleagues, CNR Bologna, Aerodyne Research


Direct and indirect climate effect?

directly scattering and

absorbing radiation

serving as condensation nuclei

during cloud formation

Direct and indirect climate effect?

directly scattering and

absorbing radiation

serving as condensation nuclei

during cloud formation


Atmospheric Research Station at Mace Head (53º20' N, 9º54' W)

PEGASO Antarctic cruise January-February 2015


12

10

8

6

4

2

0

AM

S O

M,

g m

-3

6543210

OC PM1, g m-3

Tank slope=2.1Ambient slope=2.4

Bubble tank (without CE)

Ambient (CE comp dep)

R = 0.96

Sea salt quantification by the HR-ToF-AMS

Jurgita Ovadnevaite Darius Ceburnis, Manjula Canagaratna, Douglas R. Worsnop,

Harald Berresheim, Jakub Bialek, A. Manders, G. de Leeuw

and Colin O’Dowd

15th AMS Users Meeting

Sea salt detection by the AMS

To be, or not to be…

Sea Salt

15th AMS Users Meeting

Ovadnevaite et al., 2012 JGR

Do NOT Overload!!!! Max ambient ~5 µg m-3, saturation at >20 µg m-3


5 2

5 0

87 0

8 2

10 1

79 0

13 2 20 4

61

0

15 3 24

4

52

1

22 2

32

6

36

3

33 1

45

5 12

4

21 1

59

3 9

7

40 1

38 4

15

4

24 2

36

4 31

3

28 3

34

6 29

1

11

2 12 1

73 0

7

2 6 1

84 0

19%

25%

3%

50%

2%

2%

mP

Jan

Feb March

Apr

May

Jun

Jul

AugSep

Oct

Nov

Dec

14 4 26

1

54

0

23 2 16

1

58

0

16 3 20

3

57

0

20 2

48

4 24

1

21 2

46

6 21

4

35 2

40

5 15

3

18 1

50

4 22

5 20

1

56

5 13

5

21 4

21

3

49

1

9 2

9 1

78 0

11 3

11 1

75

0

20% 35%

4%

37%

3%

2%

mA

Jan

Feb March

Apr

May

Jun

Jul

AugSep

Oct

Nov

Dec

43

11

32 13

1 0

38

11

33 17

1 0

43

23

21

12 0 0

37

24

23

15

0 1

49

6

30

13 1 1

43

4

37 14

0 2

36 2

47 10 1 4 58

5 27

9 0 1

33 4

46 15

1 0

44

7

38

10 0

0

49

6

33

11 1

0

43%

13%

30%

13%

1% 1%

cP

Jan

Feb March

Apr

May

Jun

Jul

AugSep

Oct

Nov

Dec

9 2

4 0

85 0

14 3

14 1

69

0

17 3 27

4

49

0

14 2 35

5

41

1

21 2

51

6 14

5

20 2

51

10 14

4

20 1

56

3 14

6 32 2

47

4 12

3

30 2

32

4 30

2

28 3

28

6 34

1

10 2

25 4

58

0

14

5 20 3

58

0

18% 36%

4%

37%

2%

2%

mT

Jan

Feb March

Apr

May

Jun

Jul

AugSep

Oct

Nov

Dec

Sea salt

NO3-

Organics

MSA

SO42-

NH4+

7 years of continuous Aerosol Mass Spectrometry measurements at Mace Head Atmospheric Research station revealed seasonal trends in the chemical composition of submicron aerosol as well as chemical signatures associated with air masses of different origin.

AMS measurements at Mace Head


4

3

2

1

0

Conce

ntr

atio

n [

µg m

-3]

00:0016/08/2009

00:0017/08/2009

Date

1.0

0.8

0.6

0.4

0.2

0.0

Enrich

men

t

4

3

2

1

0

Conce

ntr

atio

n [

µg m

-3]

00:0011/11/2010

12:00 00:0012/11/2010

12:00

Date

1.0

0.8

0.6

0.4

0.2

0.0

Enrich

men

t

OM Sea salt Enrichment OM Sea salt Enrichment

4

3

2

1

0

Con

cent

ratio

n [µ

g m

-3]

00:0016/08/2009

00:0017/08/2009

Date

1.0

0.8

0.6

0.4

0.2

0.0E

nrichment

4

3

2

1

0

Con

cent

ratio

n [µ

g m

-3]

00:0011/11/2010

12:00 00:0012/11/2010

12:00

Date

1.0

0.8

0.6

0.4

0.2

0.0

Enrichm

ent

OM Sea salt Enrichment OM Sea salt Enrichment

82%

2% 5% 0% 11%

0%

74%

2% 8% 0% 15%

1%

59%

2% 12% 0%

23%

4% 50%

2%

15% 1% 27%

4%

35% 2%

21%

3%

34%

6%

11%

1% 33%

4%

46%

5%

9% 1%

21% 7%

60%

3%

14% 1% 39%

4%

38%

3%

30% 2%

23%

3%

38%

4%

28% 3%

27%

1%

35%

6%

69%

2% 10% 0% 17%

1%

71%

2% 10% 0%

16% 1%

48%

18%

2% 28%

3% 2% mP

Jan

Feb March

Apr

May

Jun

Jul

AugSep

Oct

Nov

Dec

1.0

0.8

0.6

0.4

0.2

0.0

[g

m-3

]

1 2 3 4 5 6 7 8 9 101112

2.46OrganicsOrganics

2.0

1.5

1.0

0.5

0.0

[g m

-3]

1 2 3 4 5 6 7 8 9 101112

0.20

0.15

0.10

0.05

0.00

[g m

-3]

1 2 3 4 5 6 7 8 9 101112

0.25

0.20

0.15

0.10

0.05

0.00

[g

m-3

]1 2 3 4 5 6 7 8 9 101112

80x10-3

60

40

20

0[

g m

-3]

1 2 3 4 5 6 7 8 9 101112

Sea salt

NO3-

Organics

MSA

SO42-

NH4+

Neutralization

MSA/SO42-

2.0

1.5

1.0

0.5

0.0

[g

m-3

]

1 2 3 4 5 6 7 8 9 101112

Marine Polar

a) b)

82%

2% 5% 0% 11%

0%

74%

2% 8% 0% 15%

1%

59%

2% 12% 0%

23%

4% 50%

2%

15% 1% 27%

4%

35% 2%

21%

3%

34%

6%

11%

1% 33%

4%

46%

5%

9% 1%

21% 7%

60%

3%

14% 1% 39%

4%

38%

3%

30% 2%

23%

3%

38%

4%

28% 3%

27%

1%

35%

6%

69%

2% 10% 0% 17%

1%

71%

2% 10% 0%

16% 1%

48%

18%

2% 28%

3% 2% mP

Jan

Feb March

Apr

May

Jun

Jul

AugSep

Oct

Nov

Dec

1.0

0.8

0.6

0.4

0.2

0.0

[g

m-3

]

1 2 3 4 5 6 7 8 9 101112

2.46OrganicsOrganics

2.0

1.5

1.0

0.5

0.0

[g

m-3

]

1 2 3 4 5 6 7 8 9 101112

0.20

0.15

0.10

0.05

0.00

[g

m-3

]

1 2 3 4 5 6 7 8 9 101112

0.25

0.20

0.15

0.10

0.05

0.00

[g

m-3

]

1 2 3 4 5 6 7 8 9 101112

80x10-3

60

40

20

0[

g m

-3]

1 2 3 4 5 6 7 8 9 101112

Sea salt

NO3-

Organics

MSA

SO42-

NH4+

Neutralization

MSA/SO42-

2.0

1.5

1.0

0.5

0.0

[g

m-3

]

1 2 3 4 5 6 7 8 9 101112

Marine Polar

a) b)



Ambient and Laboratory studies

O’Dowd et al., 2015 Nat. Scientific Reports

Wave history



RHw (Reynolds number)

𝑅𝐻𝑤 =𝐶𝑑1/2

∗ 𝑈10∗HS

𝜈𝑤 Cd - Drag coefficient

U10-10 m wind speed HS - Significant height of wind waves

w - kinematic viscosity of sea water

w depends on SST and salinity

600

500

400

300

200

100

0

dN

/dlo

gD

2 3 4 5 6 7 8 9

0.12 3

Ddry [m]

25

20

15

10

5

Win

d sp

eed [m

s-1]

i i CMDi Fi(RHw)

1 1.37 0.018 104.5*(RHw-1e5)0.556

2 1.5 0.041 0.0442*(RHw-1e5)1.08

3 1.42 0.09 149.6*(RHw-1e5)0.545

4 1.53 0.23 2.96*(RHw-1e5)0.79

5 1.85 0.83 0.51*(RHw-2e5)0.87

Ovadnevaite et al., 2014 ACP

(Goddijn-Murphy et al., 2011)


Ovadnevaite et al., 2014 ACP

SSSF intercomparison



Atmospheric Research Station at Mace Head (53º20' N, 9º54' W)

PEGASO Antarctic cruise January-February 2015


14%

0% 7% 0%

79%


50x10-12

40

30

20

10

0

Sig

nal (a

mps)

150140130120110100908070605040302010

m/z

From:01/27/2015 15:56:32To:01/27/2015 16:35:10

120x10-12

100

80

60

40

20

0

58

18:0007/01/2015

00:0008/01/2015

06:00 12:00 18:00 00:0009/01/2015

UTC Time

100x10-12

80

60

40

20

0

-20

43

+4

4+

55

3.0

2.5

2.0

1.5

1.0

0.5

0.0

Co

nce

ntr

atio

n,

g m

3

00:0005/01/2015

00:0006/01/2015

Time

Org NO3 SO4 NH4 SS MSA



6

4

2

0Rel

ati

ve

inte

nsi

ty [

%]

100908070605040302010m/z

16

CxHy CxHyOw >1 CxHyOk =1 Others

0.06

0.04

0.02

0.00

Rel

ati

ve

inte

nsi

ty

100908070605040302010

m/z

0.16

0.08

Cx CxHy CxHyO

CxHyOw>1 CxHyN

CxHyON

CxHyOw>1N

CS

HO


Thank you!

This work was supported by the ESA (OSSA), SFI Ireland, HEA-PRTLI4, BACCHUS EU FP7, PEGASO.

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Marine aerosol measurements - welcome |...

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