Donald R. Blake (PI), Nicola J. Blake, Simone Meinardi, Angela Young, Andreas Beyersdorf, Lambert A....

Donald R. Blake (PI), Nicola J. Blake, Simone Meinardi, Angela Young, Andreas Beyersdorf, Lambert A. Doezema, Brian Novak, Barbara Barletta, Jason Midyett, Michael A Kamboures, Henry Fuelberg (and team), Stephanie Vay, Melody Avery….and the

rest of the INTEX Science Team

Trace Gases in Whole Air Samples Collected on the DC-8 for INTEX-NA

Donald R. Blake (PI), Nicola J. Blake, Simone Meinardi, Angela Young, Andreas Beyersdorf, Lambert A. Doezema, Brian Novak, Barbara Barletta, Jason Midyett, Michael A Kamboures, Henry Fuelberg (and team), Stephanie Vay, Melody Avery….and the

rest of the INTEX Science Team

Trace Gases in Whole Air Samples Collected on the DC-8 for INTEX-NA

Main NMHC/CFC/AN System - 2936 samples

Analysis by GC/ECD/FID/MS at UC-Irvine

Main NMHC/CFC/AN System - 2936 samples

CH4 System - 2263 samples

Analysis by GC/ECD/FID/MS at UC-Irvine

Main NMHC/CFC/AN System - 2936 samples

CO System - 586 samplesCH4 System - 2263 samples

Analysis by GC/ECD/FID/MS at UC-Irvine

Comparison of TRACE-P and INTEX

Expect lower summer levels (OH consumption) - as see for ethyne

0 500 1000 1500 2000 2500

TRACE-P (Spring)INTEX (Summer)

0

2

4

6

8

10

12

Mixing Ratio (pptv)

Ethyne

Altitude km

Comparison of TRACE-P and INTEX

Expect lower summer levels (OH consumption) - as see for ethyne•But - relatively more ethane for INTEX

(Less combustion/compared to alkane sources?)

0 1000 2000 3000 4000 5000

TRACE-P (Spring)INTEX (Summer)

0

2

4

6

8

10

12

Mixing Ratio (pptv)

Ethane

0 500 1000 1500 2000 2500

TRACE-P (Spring)INTEX (Summer)

0

2

4

6

8

10

12

Mixing Ratio (pptv)

Ethyne

Altitude km

Comparison of TRACE-P and INTEX

Expect lower summer levels (OH consumption) - as see for ethyne•But - relatively more ethane for INTEX

(Less combustion/compared to alkane sources?)•Also - INTEX ethane “pumped up”!

0 1000 2000 3000 4000 5000

TRACE-P (Spring)INTEX (Summer)

0

2

4

6

8

10

12

Mixing Ratio (pptv)

Ethane

0 500 1000 1500 2000 2500

TRACE-P (Spring)INTEX (Summer)

0

2

4

6

8

10

12

Mixing Ratio (pptv)

Ethyne

Altitude km

Comparison of TRACE-P and INTEX

0 0.5 1 1.5 2

TRACE-P (Spring)INTEX (Summer)

0

2

4

6

8

10

12

Mixing Ratio (pptv)

CH3I

Altitude km

Comparison of TRACE-P and INTEX

Surprisingly high levels over the continent during INTEX

- terrestrial as well as ocean sources?

0 0.5 1 1.5 2

TRACE-P (Spring)INTEX (Summer)

0

2

4

6

8

10

12

Mixing Ratio (pptv)

CH3I

Altitude km

Comparison of TRACE-P and INTEX

3 4 5 6 7 8 9 10

TRACE-P (Spring)INTEX (Summer)

0

2

4

6

8

10

12

Mixing Ratio (pptv)

H-1211

Altitude km

• Fewer low alt plumes than TRACE-P

Comparison of TRACE-P and INTEX

• Fewer low alt plumes than TRACE-P

• High altitude enhancement during INTEX -> long range transport from Asia??

3 4 5 6 7 8 9 10

TRACE-P (Spring)INTEX (Summer)

0

2

4

6

8

10

12

Mixing Ratio (pptv)

H-1211

Altitude km

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Flight Track with Color-coded Altitude

45

40

35

30

25

-90 -85 -80 -75 -70

13

14

15

1617

18

19

20

21

12

10

8

6

4

2

0

Altitude km

Smaller blue squares correspond to the 6 BL runs

Contrast between Ocean and Land BL Data

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Flight Track with Color-coded Altitude

45

40

35

30

25

-90 -85 -80 -75 -70

13

14

15

1617

18

19

20

21

12

10

8

6

4

2

0

Altitude km

Smaller blue squares correspond to the 6 BL runs

• First 3 over Atlantic

1

23

Contrast between Ocean and Land BL Data

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Flight Track with Color-coded Altitude

45

40

35

30

25

-90 -85 -80 -75 -70

13

14

15

1617

18

19

20

21

12

10

8

6

4

2

0

Altitude km

Smaller blue squares correspond to the 6 BL runs

• First 3 over Atlantic

• Last 3 over Land

1

23

4

5

6

Contrast between Ocean and Land BL Data

1

23

45

6

1

23

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

45

40

35

30

25

-90 -85 -80 -75 -70

13

14

15

1617

18

19

20

21

12

10

8

6

4

2

0

Altitude km

1

23

45

6

1

23

4

56

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

45

40

35

30

25

-90 -85 -80 -75 -70

13

14

15

1617

18

19

20

21

12

10

8

6

4

2

0

Altitude km

0.0

50.0

100.0

150.0

200.0

250.0

300.0

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

Ethyne Alt P (km)

UTC

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

Tracers: Combustion (ethyne)

0.0

50.0

100.0

150.0

200.0

250.0

300.0

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

Ethyne Alt P (km)

UTC

15

20

25

30

35

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CH2Cl2 Alt P (km)

UTC

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

Tracers: Combustion (ethyne)

& industrial (CH2Cl2)

0.0

50.0

100.0

150.0

200.0

250.0

300.0

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

Ethyne Alt P (km)

UTC

15

20

25

30

35

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CH2Cl2 Alt P (km)

UTC

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

Tracers: Combustion (ethyne)

& industrial (CH2Cl2)

• clean MBL

0.0

50.0

100.0

150.0

200.0

250.0

300.0

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

Ethyne Alt P (km)

UTC

15

20

25

30

35

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CH2Cl2 Alt P (km)

UTC

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

Tracers: Combustion (ethyne)

& industrial (CH2Cl2)

• clean MBL

• similar enhancements in the polluted CBL

0.0

0.2

0.4

0.6

0.8

1.0

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CH3I Alt P (km)

UTC

4BL leg #4 shows influence from ocean

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

0.0

0.2

0.4

0.6

0.8

1.0

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CH3I Alt P (km)

UTC

0

500

1000

1500

2000

2500

3000

3500

0

2

4

6

8

10

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

IsopreneAlt P (km)

UTC

4BL leg #4 shows influence from ocean and land

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

0.0

0.2

0.4

0.6

0.8

1.0

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CH3I Alt P (km)

UTC

0

500

1000

1500

2000

2500

3000

3500

0

2

4

6

8

10

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

IsopreneAlt P (km)

UTC

4

4

BL leg #4 shows influence from ocean and land

- as in trajectory

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

High Levels of organic Br gases from Caribbean

0

2

4

6

8

10

12

14

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CHBr3CH2Br2

Alt P (km)

UTC

33

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

0

2

4

6

8

10

12

14

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CHBr3CH2Br2

Alt P (km)

UTC

3

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

6

8

10

12

14

16

18

20

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CH3Br Alt P (km)

UTC

4 High MeBr associated with ag. regions of FL

Contrast between Ocean and Land BL Data

High Levels of organic Br gases from Caribbean

4

3

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

0

5

10

15

20

0

2

4

6

8

10

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

i-PrONO22-BuONO2

Alt P (km)

UTC

Leg 4 also has high levels of secondary pollutants

4

4

In BL for past 10 days

0

50

100

150

200

0

2

4

6

8

10

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

i-PrONO22-BuONO2

Alt P (km)

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

0

5

10

15

20

0

2

4

6

8

10

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

i-PrONO22-BuONO2

Alt P (km)

UTC

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

0

200

400

600

800

1,000

1,200

1,400

1,600

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

acetone_Singh Acetone_UCI

UTC

4

Leg 4 also has high levels of secondary pollutants

4

4

In BL for past 10 days

New UCI acetone data (unarchived) - compare to Singh group acetone

0

50

100

150

200

0

2

4

6

8

10

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

i-PrONO22-BuONO2

Alt P (km)

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

0

5

10

15

20

0

2

4

6

8

10

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

i-PrONO22-BuONO2

Alt P (km)

UTC

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

0

200

400

600

800

1,000

1,200

1,400

1,600

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

acetone_Singh Acetone_UCI

UTC

4

Leg 4 also has high levels of secondary pollutants

4

4

In BL for past 10 days

New UCI acetone data (unarchived) - compare to Singh group acetone

• strong similarities with i-PrONO2

• both high in Leg #4

350

355

360

365

370

375

380

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CO2 (ppmv)

Alt P (km)

UTC

300

350

400

450

500

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

OCS Alt P (km)

UTC

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

Both CO2 and OCS show draw-down over land

350

355

360

365

370

375

380

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CO2 (ppmv)

Alt P (km)

UTC

300

350

400

450

500

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

OCS Alt P (km)

UTC

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

Both CO2 and OCS show draw-down over land

Uptake of OCS and CO2 has common pathway

•through open stomata•transport resistances virtually the same. [Goldan et al. 1988]

350

355

360

365

370

375

380

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CO2 (ppmv)

Alt P (km)

UTC

300

350

400

450

500

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

OCS Alt P (km)

UTC

Both CO2 and OCS show draw-down over land

Uptake of OCS and CO2 has common pathway

•through open stomata•transport resistances virtually the same. [Goldan et al. 1988]

•Regional variation of OCS uptake uncertain [Kettle et al., 2002]

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

Comparison of TRACE-P and INTEX

Summer vegetation sink for CO2 main difference between missions? (Stephanie/Melody???)

340 350 360 370 380 390 400

INTEX (Summer)TRACE-P (Spring)

0

2

4

6

8

10

12

Mixing Ratio (ppmv)

CO2

Altitude km

Comparison of TRACE-P and INTEX

Like CO2 see vegetation sink for OCS in summer over the US

300 400 500 600 700 800 900 1000

TRACE-P (Spring)INTEX (Summer)

0

2

4

6

8

10

12

Mixing Ratio (pptv)

OCS

Altitude km

Comparison of TRACE-P and INTEX

Like CO2 see vegetation sink for OCS in summer over the US

Also:

• US much smaller source for OCS?? (much less and cleaner coal

burning)?

300 400 500 600 700 800 900 1000

TRACE-P (Spring)INTEX (Summer)

0

2

4

6

8

10

12

Mixing Ratio (pptv)

OCS

Altitude km

350

355

360

365

370

375

380

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CO2 (ppmv)

Alt P (km)

UTC

300

350

400

450

500

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

OCS Alt P (km)

UTC

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

Both CO2 and OCS show draw-down over land

- Revisited!

450

500

550

600

650

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CH3Cl Alt P (km)

UTC

350

355

360

365

370

375

380

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

CO2 (ppmv)

Alt P (km)

UTC

300

350

400

450

500

0

2

4

6

8

10

12

13:00:00 15:00:00 17:00:00 19:00:00 21:00:00

OCS Alt P (km)

UTC

INTEX-NA Flight 12July 25, 2004 (4th Pease Local)

Contrast between Ocean and Land BL Data

Both CO2 and OCS show draw-down over land

- Revisited!

MeCl also shows clear evidence of uptake over land

•This pathway less well known

>Soil sink?

>Vegetation sink?

Comparison of TRACE-P and INTEX

• US much smaller source for MeCl than Asia (much less biomass/biofuel/coal burning)??

400 500 600 700 800 900100011001200

TRACE-P (Spring)INTEX (Summer)

0

2

4

6

8

10

12

Mixing Ratio (pptv)

CH3Cl

Altitude km

Comparison of TRACE-P and INTEX

400 500 600 700 800 900100011001200

TRACE-P (Spring)INTEX (Summer)

0

2

4

6

8

10

12

Mixing Ratio (pptv)

CH3Cl

Altitude km

• US much smaller source for MeCl than Asia (much less biomass/biofuel/coal burning)??

• MeCl frequently influenced by PBL draw-down

Comparison of TRACE-P and INTEX

400 500 600 700 800 900100011001200

TRACE-P (Spring)INTEX (Summer)

0

2

4

6

8

10

12

Mixing Ratio (pptv)

CH3Cl

Altitude km

• US much smaller source for MeCl than Asia (much less biomass/biofuel/coal burning)??

• MeCl frequently influenced by PBL draw-down

• less useful as a biomass burning tracer

54

52

50

48

46

44

42

40

38

-75 -70 -65 -60 -55 -50 -45

14

15 16 17

18

19

20

2122

500

400

300

200

100

0

Ethyne pptv

54

52

50

48

46

44

42

40

38

-75 -70 -65 -60 -55 -50 -45

14

1516 17

18

19

20

2122

12

10

8

6

4

C2Cl4

pptv

Ethyne

C2Cl4

Biomass Burning TracersINTEX-NA Flight 9

July 18, 2004 (1st Pease Local)

Alaska Fire Plume

Alaska Fire Plume

54

52

50

48

46

44

42

40

38

-75 -70 -65 -60 -55 -50 -45

14

1516 17

18

19

20

2122

570

560

550

540

530

520

510

500

CH3Cl

54

52

50

48

46

44

42

40

38

-75 -70 -65 -60 -55 -50 -45

14

15 16 17

18

19

20

2122

500

400

300

200

100

0

Ethyne pptv

Ethyne

CH3Cl

Biomass Burning TracersINTEX-NA Flight 9

July 18, 2004 (1st Pease Local)

Alaska Fire Plume

Alaska Fire Plume

400

450

500

550

600

650

0 100 200 300 400 500 600CO (ppbv)

CH3

Cl (pptv)

Biomass Burning TracersAll INTEX Data

• CO: high in major BB Influence (CO >160 ppb)

400

450

500

550

600

650

0 100 200 300 400 500 600CO (ppbv)

CH3

Cl (pptv)

Biomass Burning TracersAll INTEX Data

0

10

20

30

40

50

60

70

80

0 100 200 300 400 500 600CO (ppbv)

C2

Cl4

(pptv)

• CO: high in major BB Influence (CO >160 ppb)

• C2Cl4: high for urban/industrial

Urban/industrial

400

450

500

550

600

650

0 100 200 300 400 500 600CO (ppbv)

CH3

Cl (pptv)

Biomass Burning TracersAll INTEX Data

0

10

20

30

40

50

60

70

80

0 100 200 300 400 500 600CO (ppbv)

C2

Cl4

(pptv)

• CO: high in major BB Influence (CO >160 ppb)

• C2Cl4: high for urban/industriallow for pure BB

(select for C2Cl4 <10 pptv)

Urban/industrial

Biomass Burning?

400

450

500

550

600

650

0 100 200 300 400 500 600CO (ppbv)

CH3

Cl (pptv)

Biomass Burning TracersAll INTEX Data

0

10

20

30

40

50

60

70

80

0 100 200 300 400 500 600CO (ppbv)

C2

Cl4

(pptv)

• CO: high in major BB Influence (CO >160 ppb)

• C2Cl4: high for urban/industriallow for pure BB

(select for C2Cl4 <10 pptv)

• Large range of CH3Cl for low C2Cl4

Urban/industrial

Biomass Burning?

0

10

20

30

40

50

60

70

80

400 450 500 550 600 650CH

3Cl (pptv)

C2

Cl4

(pptv)

Biomass Burning TracersAll INTEX Data Data Subset: CO >160 ppb, C2Cl4 <10 pptv

100 200 300 400 500 600460

480

500

520

540

560

580

600

CO (ppbv)

CH3

Cl (pptv)

400

450

500

550

600

650

0 100 200 300 400 500 600CO (ppbv)

CH3

Cl (pptv)

0

10

20

30

40

50

60

70

80

0 100 200 300 400 500 600CO (ppbv)

C2

Cl4

(pptv)

0

10

20

30

40

50

60

70

80

400 450 500 550 600 650CH

3Cl (pptv)

C2

Cl4

(pptv)

Few data that look like BB

Biomass Burning TracersAll INTEX Data Data Subset: CO >160 ppb, C2Cl4 <10 pptv

100 200 300 400 500 600460

480

500

520

540

560

580

600

CO (ppbv)

CH3

Cl (pptv)

400

450

500

550

600

650

0 100 200 300 400 500 600CO (ppbv)

CH3

Cl (pptv)

0

10

20

30

40

50

60

70

80

0 100 200 300 400 500 600CO (ppbv)

C2

Cl4

(pptv)

0

10

20

30

40

50

60

70

80

400 450 500 550 600 650CH

3Cl (pptv)

C2

Cl4

(pptv)

Few data that look like BB

0 200 400 600 800 1000 1200 1400 1600460

480

500

520

540

560

580

600

CH3CN (pptv)

CH3

Cl (pptv) MeCl vs. Acetonitrile

Other Tracers:

Biomass Burning TracersAll INTEX Data Data Subset: CO >160 ppb, C2Cl4 <10 pptv

100 200 300 400 500 600460

480

500

520

540

560

580

600

CO (ppbv)

CH3

Cl (pptv)

400

450

500

550

600

650

0 100 200 300 400 500 600CO (ppbv)

CH3

Cl (pptv)

0

10

20

30

40

50

60

70

80

0 100 200 300 400 500 600CO (ppbv)

C2

Cl4

(pptv)

0

10

20

30

40

50

60

70

80

400 450 500 550 600 650CH

3Cl (pptv)

C2

Cl4

(pptv)

Few data that look like BB

0 200 400 600 800 1000 1200 1400 1600460

480

500

520

540

560

580

600

CH3CN (pptv)

CH3

Cl (pptv) MeCl vs. Acetonitrile

Other Tracers:

0 500 1000 1500 2000 2500

HCN_CITHCN_Singh

460

480

500

520

540

560

580

600

HCN (pptv)

CH3

Cl (pptv)MeCl vs. HCN

Biomass Burning TracersAll INTEX Data Data Subset: CO >160 ppb, C2Cl4 <10 pptv

100 200 300 400 500 600460

480

500

520

540

560

580

600

CO (ppbv)

CH3

Cl (pptv)

400

450

500

550

600

650

0 100 200 300 400 500 600CO (ppbv)

CH3

Cl (pptv)

0

10

20

30

40

50

60

70

80

0 100 200 300 400 500 600CO (ppbv)

C2

Cl4

(pptv)

0

10

20

30

40

50

60

70

80

400 450 500 550 600 650CH

3Cl (pptv)

C2

Cl4

(pptv)

Bottom Line:

0 200 400 600 800 1000 1200 1400 1600460

480

500

520

540

560

580

600

CH3CN (pptv)

CH3

Cl (pptv)

0 500 1000 1500 2000 2500

HCN_CITHCN_Singh

460

480

500

520

540

560

580

600

HCN (pptv)

CH3

Cl (pptv)

• No really great BB tracers during INTEX (?)

• Not much BB influence directly sampled during INTEX

“SW” Pollution

Mid-Continental Oil FieldEthane from surface study

[Katzenstein et al., 2003]

SW pollution characterized by:

• High levels of alkanes and daughter alkyl nitrates

• Low levels of urban tracers (such as CO)

“SW” Pollution55

50

45

40

35

30

25

-140 -120 -100 -80 -60 -40

24

22

20

18

16

14

Ratio Ethane/CO (pptv/ppbv)

Air masses with “SW” style oil and gas pollution were widespread during INTEX-NA

• sampled on >15 legs on 10 flights

0

1000

2000

3000

4000

5000

0

2

4

6

8

10

12

15:00:00 17:00:00 19:00:00 21:00:00 23:00:00

EthanePropaneEthyne

Alt P

UTC

INTEX Flight 7July 12, 2004

“SW” Pollution

0

1000

2000

3000

4000

5000

0

2

4

6

8

10

12

15:00:00 17:00:00 19:00:00 21:00:00 23:00:00

EthanePropaneEthyne

Alt P

UTC

INTEX Flight 7July 12, 2004

"SW Pollution"- High ethane & propane- Low ethyne (& CO)

“SW” Pollution

0

1000

2000

3000

4000

5000

0

2

4

6

8

10

12

15:00:00 17:00:00 19:00:00 21:00:00 23:00:00

EthanePropaneEthyne

Alt P

UTC

INTEX Flight 7July 12, 2004

"SW Pollution"- High ethane & propane- Low ethyne (& CO)

“SW” Pollution

Terrestrial Influences on Atmospheric Carbonyl Sulfide and Methyl Chloride over the US during Summertime”, Blake and Blake et al.,

”More Evidence for the Widespread Transport of Light Alkane Pollution from the Southwestern US”, Young, Blake and Blake, Model group, et al.,

"Gaseous Tracers of Convective Uplift during INTEX NA”, Blake and Blake and Fuelburg et al.,

"Coastal Emissions of Bromoform and Dibromomethane during INTEX NA"Blake and Blake et al.,

"Evidence for Long-range Transport of Asian Emissions to the US During Summer”, Blake and Blake and Fuelburg et al.,

First Cut Papers List