inter-comparisons between hr-tof-ams and...

5/12/2017

1

Inter-comparisons between HR-ToF-AMS and ACSM

Yele SunInstitute of Atmospheric Physics, CAS

AMS/ACSM Measurements in China (July 2016)

ACSM Datasets

UrbanN=22

Non-urbanN=13

5/12/2017

2

ACTRIS ACSM Inter-comparisons

Reproducibility expanded uncertainties of Q-ACSM concentration measurements (%)

Crenn et al., AMT, 2015

•PM1Composition:─ Organics, sulfate,

nitrate, ammonium, and chloride

ACSM260m

Tower Measurements

─ Time res.: 5min

HR-ToF-AMS

•Gaseous species: ─ CO, SO2, O3

─ Time res.:1min

•CAPS + AE33:

Ground

─ Particle ext (1 s)─ BC (1 min)

•SMPS: ─ Particle number size

distributions (5 min)

5/12/2017

3

150

100c.(µ

g m

-3)

ACSM 59%

ACSM vs. HR-ToF-AMS

150

100

50

0Mas

s C

onc.

(µg

m-3

)100

50

0Mas

s C

onc

HR-ToF-AMS

8% 18%

10% 5%

60%

10% 14% 8%

8%

11/26/2013 11/30/2013 12/04/2013 12/08/2013 12/12/2013Date & Time

14%

Same InletDefault RIEs except ammonium

160

120

80

g, A

CSM

r2 = 0.98Slope = 0.98

250

200

150

100Con

c. (µ

g m

-3)

Org HR-ToF-AMS ACSM

ACSM vs. HR-ToF-AMS

40

0

Org

16012080400Org, HR-ToF-AMS

100

50

0

Mas

s C

11/26/2013 11/30/2013 12/04/2013 12/08/2013 12/12/2013

50

40

M

r2 = 1Slope = 0.82

60

50

40µg m

-3)

SO4 HR-ToF-AMS ACSM

30

20

10

0

SO4,

ACS

6050403020100SO4, HR-ToF-AMS

40

30

20

10

0

Mas

s C

onc.

(µ

11/26/2013 11/30/2013 12/04/2013 12/08/2013 12/12/2013

5/12/2017

4

40

30

203, AC

SMr2 = 0.99Slope = 1.24 40

30

20onc.

(µg

m-3

)

NO3 HR-ToF-AMS ACSM

ACSM vs. HR-ToF-AMS

20

10

0

NO

3

302520151050NO3, HR-ToF-AMS

20

10

0

Mas

s C

o

11/26/2013 11/30/2013 12/04/2013 12/08/2013 12/12/2013

30

M

r2 = 0.99Slope = 1.2 30

µg m

-3)

NH4 HR-ToF-AMS ACSM

20

10

0

NH

4, AC

S

302520151050NH4, HR-ToF-AMS

20

10

0

Mas

s C

onc.

(µ

11/26/2013 11/30/2013 12/04/2013 12/08/2013 12/12/2013

20

15

10, AC

SM

r2 = 0.97Slope = 0.61 30

20

onc.

(µg

m-3

)

Chl HR-ToF-AMS ACSM

ACSM vs. HR-ToF-AMS

5

0

Chl

302520151050Chl, HR-ToF-AMS

10

0

Mas

s C

o

11/26/2013 11/30/2013 12/04/2013 12/08/2013 12/12/2013

300

250

200SM

r2 = 0.99Slope = 0.99

400

300

µg m

-3)

Total HR-ToF-AMS ACSM

200

150

100

50

0

Tota

l, AC

S

3002001000Total, HR-ToF-AMS

200

100

0

Mas

s C

onc.

(µ

11/26/2013 11/30/2013 12/04/2013 12/08/2013 12/12/2013

5/12/2017

5

1210

8644

, AC

SM

r2 = 0.95Slope = 1.51

12

10

8

6c (µ

g m

-3)

HR-ToF-AMS ACSM

44: ACSM vs. HR-ToF-AMS

420

m/z

4

86420m/z 44, HR-ToF-AMS

0.15

CSM

r2 = 0.58Slope = 1.41

4

2

0

Con

c

11/26/2013 12/01/2013 12/06/2013 12/11/2013Date & Time

0.15

HR-ToF-AMS ACSM

0.10

0.05

0.00

f 44,

AC

0.150.100.050.00f 44, HR-ToF-AMS

0.10

0.05

0.00

f 44

11/26/2013 12/01/2013 12/06/2013 12/11/2013Date & Time

20

15

(µg

m-3

)

HR-ToF-AMS ACSM

12

10

8

6, AC

SM

r2 = 0.97Slope = 0.94

43: ACSM vs. HR-ToF-AMS

0.10

0.08

0.0643

HR-ToF-AMS ACSM

10

5

0

Con

c (

11/26/2013 12/01/2013 12/06/2013 12/11/2013Date & Time

0.10

0.08

0.06ACSM

r2 = 0.19Slope = 0.79

6

4

2

0

m/z

43

12840m/z 43, HR-ToF-AMS

0.04

0.02

0.00

f

11/26/2013 12/01/2013 12/06/2013 12/11/2013Date & Time

0.04

0.02

0.00

f 43,

0.100.080.060.040.020.00f 43, HR-ToF-AMS

5/12/2017

6

0.12ig

nal HR-ToF-AMS

ACSM

AMS vs. ACSM: Mass Spectra

Large overestimation of m/z 44 during clean periods

0.120.100.08C

SM

r2 = 0.51Slope = 1.05

44

0.08

0.04

0.00

Frac

tion

of S

120110100908070605040302010m/z (amu)

Clean

0.08

0.06f Sig

nal HR-ToF-AMS

ACSM

Polluted

0.08

0.06

CSM

r2 = 0.94Slope = 0.99 43

44

29

0.060.040.020.00

MS A

C

0.060.040.020.00MSHR-ToF-AMS

43

55

29

15

0.04

0.02

0.00

Frac

tion

of

120110100908070605040302010m/z (amu)

Polluted0.04

0.02

0.00

MS A

C

0.080.060.040.020.00MSHR-ToF-AMS

55

15

0.08

0.06

of S

igna

l COA

OA Factors: ACSM vs. HR-ToF-AMS

0.08

0.06

ACSM

r2 = 0.92Slope = 0.92

0.04

0.02

0.00

Frac

tion

o

120110100908070605040302010m/z (amu)

200

150µg m

-3)

HR-ToF-AMS ACSM

COA 60

50

40SM

r2 = 0.89Slope = 0.52

0.04

0.02

0.00

MS C

OA,

A

0.080.060.040.020.00MSCOA, HR-ToF-AMS

100

50

0

Mas

s C

onc.

(µ

11/26/2013 11/30/2013 12/04/2013 12/08/2013 12/12/2013

40

30

20

10

0

CO

A, A

C

100806040200COA, HR-ToF-AMS

5/12/2017

7

0.08

0.06

0 04n of

Sig

nal CCOA

0.08

0.06

0.04

S CC

OA,

AC

SM

r2 = 0.91Slope = 0.89

HOA+CCOA


100

80

60

(µg

m-3

)

HR-ToF-AMS ACSM

CCOA100

80

ACSM

r2 = 0.86Slope = 1.46

0.04

0.02

0.00

Frac

tion

120110100908070605040302010m/z (amu)

0.02

0.00

MS

0.080.060.040.020.00MSCCOA, HR-ToF-AMS

HOA+CCOA

60

40

20

0

Mas

s C

onc.

11/26/2013 11/30/2013 12/04/2013 12/08/2013 12/12/2013

60

40

20

0

CC

OA,

A

6040200CCOA, HR-ToF-AMS

0.20

0.15

0 10of S

igna

l OOA

0.20

0.15

0.10

OO

A, A

CSM

r2 = 0.95Slope = 1.2


50

40µg m

-3)

HR-ToF-AMS ACSM

OOA 50

40

30SM

r2 = 0.95Slope = 0.9

0.10

0.05

0.00

Frac

tion

120110100908070605040302010m/z (amu)

0.05

0.00

MS O

0.120.080.040.00MSOOA, HR-ToF-AMS

30

20

10

0

Mas

s C

onc.

(µ

11/26/2013 11/30/2013 12/04/2013 12/08/2013 12/12/2013

30

20

10

0

OO

A, A

C

50403020100OOA, HR-ToF-AMS

5/12/2017

8

120

80nc

.(µg

m-3

)ACSM 33%

21%


120

80

40

0Mas

s C

onc.

(µg

m-3

)

40

0Mas

s C

on

HR-ToF-AMS 46%

33%

39%

11/26/2013 11/30/2013 12/04/2013 12/08/2013 12/12/2013Date & Time

28%

100

803 )

ACSM AMS

Org

ACSM: Filament 2

80

60

40

20Mas

s C

once

ntra

tion

(µg

m- 3 AMS

R2 = 0.97 (ACSM vs. AMS)

012:00

2016-12-140:00

2016-12-1512:00 0:00

2016-12-1612:00

Date && Time

5/12/2017

9

6

5

4

3

2ncen

tratio

n (µ

g m

-3)

m/z 43

R2 = 0.97

6

5

4

3

2

ACSM

(µg

m-3

)

f(x) = 0.86xR2 = 0.97

1:1 line43

1

0Mas

s C

on

12:002016-12-14

0:002016-12-15

12:00 0:002016-12-16

12:00

Date && Time

0.14

0.12

0.10

0.08Frac

.

f43R2

= 0.22

1

0

A

6543210AMS (µg m-3)

0.14

0.12

0.10

0.08

0 06ACSM

f(x) = 0.86xR2 = 0.22 1:1 line

f43

0.06

0.04

0.02

0.00

Mas

s F

12:002016-12-14

0:002016-12-15

12:00 0:002016-12-16

12:00

Date && Time

0.06

0.04

0.02

0.00

A

0.100.080.060.040.020.00AMS

8

6

4

2once

ntra

tion

(µg

m-3

)

m/z 44

R2 = 0.98

8

6

4

2ACSM

(µg

m-3

)

f(x) = 0.97xR2 = 0.98

1:1 line44

2

0Mas

s C

o

12:002016-12-14

0:002016-12-15

12:00 0:002016-12-16

12:00

Date && Time

0.20

0.15

0.10

ss F

rac.

f44

R2 = 0.35

2

0

86420AMS (µg m-3)

0.20

0.15

0.10

ACSM

f(x) = 1.11xR2 = 0.35

1:1 line

f44

0.05

0.00

Mas

12:002016-12-14

0:002016-12-15

12:00 0:002016-12-16

12:00

Date && Time

0.05

0.00

0.120.080.040.00AMS

5/12/2017

10

0.8

0.6

0.4ce

ntra

tion

(µg

m-3

)

m/z 60

R2 = 0.95

0.2

0.0Mas

s C

on

12:002016-12-14

0:002016-12-15

12:00 0:002016-12-16

12:00

Date && Time

0.016

0.012

rac.

f60

R2 = 0.18

0.008

0.004

0.000

Mas

s Fr

12:002016-12-14

0:002016-12-15

12:00 0:002016-12-16

12:00

Date && Time

8

6

4

2 OA

sign

al (%

)

higher f44 in ACSM ACSM AMS

100

80

60

ratio

n (µ

g m

-3)

ACSM AMS


Org

Average MS

0120110100908070605040302010

m/z (amus)

40

20

0

Mas

s C

once

ntr

12:002016-12-14

0:002016-12-15

12:00 0:002016-12-16

12:00

Date && Time

5/12/2017

11

10

8

6

4

2

OA

sign

al (%

)

lower f44 in ACSM ACSM AMS

0120110100908070605040302010

m/z (amus)100

80

60

atio

n (µ

g m

-3)

ACSM AMS


OrgAverage MS

40

20

0

Mas

s C

once

ntra

12:002016-12-14

0:002016-12-15

12:00 0:002016-12-16

12:00

Date && Time

Conclusions

• ACSM NO3 vs. SO4

• ACSM f44triangle plotO/C• ACSM f60• PMF ACSM OA: Split of POA factors• ME2: AMS spectra as constrains

5/12/2017

12

PM1 ACSM vs. PM2.5 ACSM

inter-comparisons between hr-tof-ams and...

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