Sulfate

C130

KCO

MOUDI

Sierra

ATOFMS

Berner

ATOFMS

< 1 um

< 1.8

< 2.5

< 1.14

0.2 – 1.0

1.0 – 2.5

< 0.5

< 1.0

0.2 – 1.0

1.0 – 2.5

ug/m3

#/cc

ug/m3

#/cc

SIO

0.6

NIO

1.8

3.4

0.3

BoBNE

1.77

BoBNE

3.6

8.2

BoBE

0.6

1.85

2.3

BoBE

5.2

5.9

3.1 ± 0.84

4.4

BoBE

5.6

6.7

5.1 ± 2.2

74.5

0.5

2.8

1.5

1.8

2.9

3.6 ± 0.44

3.6

4.4

0.7

5.2 - 13

5.2 ± 2.5

4.5

6.0

0.5

Low scattering: 0.6 (SIO), 1.8 (NIO), 0.6 – 2 (L BoBE), 1.5 – 3 (L AS)
Medium scattering: 1.8 (BoBNE), 4 – 6 (BoBE), 3 – 4.4 (AS)
High scattering: 4 – 8 (BoBNE), 6 – 7 (BoBE), 4 – 13 (AS)

Agreement between platforms: Agree within uncertainty of size cuts and natural variability.
MOUDI fine filter (<2.5 um) gives higher values.

Potassium

C130

KCO

MOUDI

Sierra

ATOFMS

Berner

ATOFMS

< 1 um

< 1.8

< 2.5

< 1.14

0.2 – 1.0

1.0 – 2.5

< 0.5

< 1.0

0.2 – 1.0

1.0 – 2.5

ug/m3

#/cc

ug/m3

#/cc

SIO

0.003

0.004

NIO

0.08

T 58

NSS 56

T 2.1

NSS 0.08

BoBNE

0.04

T 314

NSS 314

1.9

0.3

BoBNE

0.15

0.4

0.55

BoBE

0.07

BoBE

0.37

0.42

BoBE

0.38

0.04

0.05

T 200

NSS 196

T 1.3

NSS 0.6

0.27

0.2

0.24

T 256

NSS 231

T 1.0

NSS 0.5

0.2 – 0.53

0.27

0.35

Low scattering: 0.003 – 0.1 (SIO and NIO), 0.07 (BoBE), 0.04 (AS)
Medium scattering: 0.04 (BoBNE), 0.4 (BoBE), 0.2 – 0.3 (AS)
High scattering: 0.1 – 0.55 (BoBNE), 0.4 (BoBE), 0.2 – 0.5 (AS)

Agreement between platforms: Agree within uncertainty of size cuts and natural variability.

Sodium

C130

KCO

MOUDI

Sierra

ATOFMS

Berner

ATOFMS

< 1 um

< 1.8

< 2.5

< 1.14

0.2 – 1.0

1.0 – 2.5

< 0.5

< 1.0

0.2 – 1.0

1.0 – 2.5

ug/m3

#/cc

ug/m3

#/cc

SIO

0.009

0.03

NIO

0.007

0.035

BoBNE

0.017

BoBNE

0.034

0.024

0.049

BoBE

0.17

BoBE

0.07±0.05

BoBE

0.35

0.14± .04

0.005

0.006

0.016

0.035

0.21

0.12±0.02

0.013

0.08

< = 0.15

0.13±0.03

0.024

0.06

Assume all Na due to sea salt. C130 values 0.02 – 0.35. RB values 0.005 – 0.08.

RB values lower most likely a reflection of sharper size cuts for Berner than SFUs. Similar for KCO Sierra.

NH₄⁺ / SO₄⁼ molar ratio

C130 KCO KCO KCO KCO KCO KCO RB RB RB RB

MOUDI MOUDI MOUDI Sierra ATOFMS ATOFMS Berner Berner ATOFMS ATOFMS

< 1 um < 1.8 < 2.5 < 1.14 0.2 – 1.0 1.0 – 2.5 < 0.5 < 1.0 0.2 – 1.0 1.0 – 2.5

L SIO 0.4 0.4

L NIO 1.1 1.1

L BoBNE

M BoBNE 1.3

H BoBNE 1.2 0.66 0.63

L BoBE 1.7 1.4

M BoBE 1.5 2.8

H BoBE 1.2 1.4 2.5±.31 0.71 0.69

L AS 1.2 1.2

M AS 2.0 2 ± .43 1.5 1.5

H AS 1.5 2.2 ± .16 1.5 1.5

Low scattering: 0.4 – 1.1 (SIO), 1.7 (BoBE)
Medium scattering: 1.3 – 1.5 (BoBE and BoBNE), 1.5 – 2 (AS)
High scattering: 0.6 (BoBNE), 0.7 (BoBE), 1.5 (AS)

Aerosol is acidic with respect to sulfate in cleaner low scattering air masses (SIO and NIO).
Ship shows more acidic aerosol than C130 for polluted air masses.

Aerosol Mass

C130^* KCO KCO KCO KCO^** KCO KCO RB RB RB RB

MOUDI MOUDI MOUDI Sierra ATOFMS ATOFMS Berner Berner ATOFMS ATOFMS

< 1 um < 1.8 < 2.5 < 1.14 0.2 – 1.0 1.0 – 2.5 < 0.5 < 1.0 0.2 – 1.0 1.0 – 2.5

ug/m3 ug/m3 ug/m3 ug/m3 ug/m3 #/cc #/cc ug/m3 ug/m3 #/cc #/cc

L SIO 1.1

L NIO 1.4

L BoBNE

M BoBNE 2.4 (no C)

H BoBNE 8.7 21

L BoBE 1.1 (no C) 5.7 8

M BoBE 14 16 4.1

H BoBE 14 17 21 10 ± 5

L AS 1.4

M AS 4.8 8 ± 1.3 9.2

H AS 15 11 ± 4 12

^{* Sum of measured components – water soluble inorganic ions and
total carbon.}
^{** Sum of measured components – Cl, NO3, SO4, Na, ash, and NH4.}

^{Low scattering: 1.1 – 1.4 (SIO and NIO), 6 – 8 (BoBE),
1.4 (AS)}
^{Medium scattering: 16 (BoBE), 9 (AS)}
^{High scattering: 21 (BoBE), 17 (BoBE), 12 (AS)}

^{KCO and RB in general agreement. Only two platforms
with gravimetric mass measurement.}

^{Total Carbon}

C130 KCO KCO KCO KCO KCO RB RB RB RB

MOUDI MOUDI MOUDI ATOFMS ATOFMS Berner Berner ATOFMS ATOFMS

< 1 um < 1.8 < 2.5 0.2 – 1.0 1.0 – 2.5 < 0.5 < 1.0 0.2 – 1.0 1.0 – 2.5

ug/m3 ug/m3 ug/m3 ug/m3 #/cc #/cc ug/m3 ug/m3 #/cc #/cc

L SIO

L NIO 1.8 0.01

L BoBNE

M BoBNE

H BoBNE 3.7 2.7

L BoBE 0.94

M BoBE 1.99 1.1

H BoBE 8.8 4.0 120 0.08

L AS

M AS 1.9 1.0 27 0.01

H AS 6 +/- 4 26 0.01

C130, KCO, and RB values available although not all samples have been analyzed. Comparison should be repeated when all data are available.
Agreement at this point is very good between platforms. (Which follows the absorption data ).

Low scattering: 0.9 (BoBE)
Medium scattering: 1 – 2 (BoBE and AS)
High scattering: 3 – 4 (BoBNE), 4 – 9 (BoBE), 6+/-4 (AS)

Black Carbon

C130 KCO KCO KCO KCO KCO RB RB RB RB

MOUDI MOUDI MOUDI ATOFMS ATOFMS Berner Berner ATOFMS ATOFMS

< 1 um < 1.8 < 2.5 0.2 – 1.0 1.0 – 2.5 < 0.5 < 1.0 0.2 – 1.0 1.0 – 2.5

ug/m3 ug/m3 ug/m3 ug/m3 #/cc #/cc ug/m3 ug/m3 #/cc #/cc

L SIO

L NIO

L BoBNE

M BoBNE

H BoBNE 1.7 1.8

L BoBE 0.5

M BoBE 1.1 0.7

H BoBE 2.6 2.3

L AS

M AS 0.4 0.6

H AS 2.8

Agreement at this point is very good between platforms. (Which follows the absorption data ).
Again—only a portion of the data has been looked at.
Values from all high scattering periods are similar.

Low: 0.5 (BoBE)
Medium 0.7 – 1.1 (BoBE), 0.4 – 0.6 (AS)
High: 1.8 (BoBNE), 2.3 – 2.6 (BoBE), 2.8 (AS)

BC / TC (BC / SO4)

C130 KCO KCO KCO KCO KCO RB RB RB RB

MOUDI MOUDI MOUDI ATOFMS ATOFMS Berner Berner ATOFMS ATOFMS

< 1 um < 1.8 < 2.5 0.2 – 1.0 1.0 – 2.5 < 0.5 < 1.0 0.2 – 1.0 1.0 – 2.5

ug/m3 ug/m3 ug/m3 ug/m3 #/cc #/cc ug/m3 ug/m3 #/cc #/cc

L SIO

L NIO

L BoBNE

M BoBNE

H BoBNE 0.45 (0.5) 0.67 (.22)

L BoBE 0.53(0.84)

M BoBE 0.59 0.62 (.15)

H BoBE 0.29 0.59

L AS

M AS 0.24 (0.2) 0.62 (.14)

H AS 0.48 (0.4)

ACE 2 0.35 (.09)

BC/TC:

Low scattering: 0.53 (BoBE)
Medium: 0.6 (BoBE), 0.24 (AS)
High: 0.4 – 0.7 (BoBNE), 0.3 (BoBE), 0.5 (AS)
BC/SO4:

Variable across air masses and platforms. Needs more data. But always higher than ACE 2 average of 0.09.